Pickard & Butters etc. v. Buttonwillow Recreation etc. CA5 ( 2020 )


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  • Filed 12/28/20 Pickard & Butters etc. v. Buttonwillow Recreation etc. CA5
    NOT TO BE PUBLISHED IN THE OFFICIAL REPORTS
    California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for
    publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication
    or ordered published for purposes of rule 8.1115.
    IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA
    FIFTH APPELLATE DISTRICT
    PICKARD & BUTTERS CONSTRUCTION,
    INC.,                                                                                       F078801
    Plaintiff and Appellant,                                         (Super. Ct. No. BCV-15-100179)
    v.
    OPINION
    BUTTONWILLOW RECREATION & PARK
    DISTRICT,
    Defendant and Respondent.
    APPEAL from a judgment of the Superior Court of Kern County. David R.
    Lampe, Judge.
    Law Offices of F. Glenn Nichols and F. Glenn Nichols for Plaintiff and Appellant.
    Clifford & Brown, John R. Szewczyk and Daniel T. Clifford for Defendant and
    Respondent.
    -ooOoo-
    INTRODUCTION
    This appeal involves a dispute between a general contractor and a public agency
    over a public works contract for the improvement of a park in the unincorporated
    community of Buttonwillow. Plaintiff Pickard & Butters Construction, Inc. (PBC) filed
    suit against Buttonwillow Recreation & Park District (District) for, among other claims,
    breach of contract and for prompt payment penalties under Public Contract Code
    section 7107. PBC sought the unpaid balance due on the contract and additional sums for
    extra work outside the scope of the contract performed at District’s request, and prompt
    payment penalties.
    Prior to trial, the court granted District’s motion in limine and excluded any
    evidence PBC performed extra work without a written change order based on theories of
    oral modification or waiver of the contract’s written change order requirement, or
    evidence that PBC was entitled to payment for such extra work based on estoppel. In
    making this ruling, the court relied on two appellate cases: Katsura v. City of San
    Buenaventura (2007) 
    155 Cal.App.4th 104
     (Katsura) and P&D Consultants, Inc. v. City
    of Carlsbad (2010) 
    190 Cal.App.4th 1332
     (P&D Consultants), review denied April 13,
    2011.
    We conclude the written change order requirement in the parties’ contract did not,
    as a matter of law, preclude PBC’s claims for extra work pursuant to theories of oral
    modification, waiver, or by the doctrine of estoppel. Thus, PBC was entitled to present
    evidence supporting application of these theories and we reverse the judgment and
    remand for a new trial. We express no view whether PBC is entitled to any
    compensation for alleged extra work under any of these theories.
    FACTUAL AND PROCEDURAL BACKGROUND
    I.      The Park Improvement Project
    After a competitive bidding process required by statute, District awarded PBC a
    contract to update a 12-acre park in Buttonwillow, an unincorporated area in Kern
    2.
    County. The parties executed an agreement on October 21, 2013, for a total of
    $913,921.40. The plans and specifications for the project were designed for District by
    Meyer Civil Engineering, Inc. (MCE), whose principal Richard Meyer was the engineer
    of record on the project. Meyer retained the services of Brett Dawson, a licensed Civil
    Engineer, to supervise the construction work.
    A.     Relevant Contract Provisions
    Under the terms of the contract, PBC was to complete the work within 180 days
    followed by a 60-day maintenance period. The original agreed upon completion date was
    April 28, 2014.
    Under section C-8, the contract provided that the engineer was to “give all orders
    and directions contemplated under the Contract.” The engineer had authority to reject all
    work and materials which did not conform to the proper execution, and any discrepancies
    or misunderstandings as to the contract specifications were to be referred to the engineer
    who was to decide the matter in accordance with the true intent and meaning of the
    contract.
    The contract also allowed the engineer to make necessary changes and request
    extra work by written order. Section C-10 was devoted to the topic of “Extra Work.” If
    the engineer ordered work or materials outside the scope of the plans and specifications,
    the contractor was to perform such work. The contract stated that “[s]uch labor, materials
    and/or equipment will be classed as extra work and shall be ordered in writing before
    such work is started. No extra work will be paid for unless ordered in writing.” If the
    price for extra work could not be ascertained before the order for extra work issued, the
    contractor could proceed with the extra work pursuant to the contract’s schedule for
    compensable extra work costs.
    In the event of a dispute between the engineer and the contractor over the scope of
    the contract, section C-29 stated a condition precedent to a contractor’s claim of extra
    costs: “(b) Claims for Extra Cost – If the Contractor claims that any instructions by
    3.
    drawings, or otherwise involve extra cost under this contract, he shall give the Engineer
    written notice thereof within fifteen (15) calendar days after the receipt of such
    instructions. Each such claim shall be in reasonable detail and shall state fully the basis
    of the claim and the amount of alleged extra cost incurred. Claims not so made within
    said period shall be deemed waived.”
    Within the first ten days of each calendar month during the project, the engineer
    was to provide to District a written estimate of all work done under the contract to date,
    together with any amounts due the contractor for extra work or approved claims for extra
    costs. District would then pay the contractor 95 percent of the amount of each progress
    estimate, payable by the 13th day of the succeeding month. The remaining five percent
    was to be retained until final completion and acceptance of the work under the contract.
    B.     Change Order Process Followed
    During the contract work, there were many items of extra work District approved
    and PBC completed. There were 17 change order requests (CORs) made by PBC, which
    were forwarded to Dawson. At trial, Dawson could recall only nine of the 17 CORs. For
    CORs 2 through 10, Dawson took the requests to District’s monthly board meeting, made
    a recommendation to approve or deny, and District made a decision as to the extra work.
    Dawson then apparently orally directed PBC to undertake the work. After District board
    meetings where extra work was approved, the next monthly pay estimate issued by
    Dawson would reflect line items labeled as contract change orders. The monthly pay
    estimate, prepared by Dawson and signed by both Dawson and PBC’s principal, Mark
    Butters, would indicate whether those line items of approved changes, along with other
    work within the scope of the contract, had been completed. If PBC completed change
    order items, they were marked on the estimate as items to pay; if the items were not yet
    completed, the estimate would indicate they had been approved but nothing was owing.
    The pay estimate was then sent to District for approval and payment. District’s monthly
    board meeting minutes show when it approved the extra work for PBC’s CORs 2 through
    4.
    10, but no written authorization by Dawson was furnished to PBC between the time
    District’s board voted to approve and when the approval appeared on the next month’s
    pay estimate.1
    C.     Disputes About Project Specifications, Extra Work, and Completion
    The contract was executed on October 21, 2013, and work commenced soon
    afterward. Disputes about the specifications arose quickly, one of which was whether
    native soil or imported soil was required for excavated tree wells.
    Another dispute centered on extra turf grading work Dawson asked PBC to
    perform along Highway 58 and Meadows Street. District’s board approved $5,000 for
    this work, it was listed as an approved change order on pay estimate 5, but then was
    removed from pay estimate 6.
    Butters testified PBC was directed to perform work only along Highway 58, and it
    was initially limited to regrading and piling up the scalped materials without removal.
    According to Butters, District’s General Manager, Marie Parsons, or Dawson directed
    PBC to do similar grading along Meadows Street. PBC ended up grading and removing
    the graded materials at a cost of approximately $16,000. Dawson said the board
    approved a maximum of $5,000 for the work, to which Butters objected as far under the
    actual cost of the work requested.
    Dawson testified there was a change order for work along Highway 58; he had
    asked PBC to prepare a time and materials estimate for that additional work; Dawson
    gave that request to Parsons who in turn took it to District’s board. The board approved
    work not to exceed $5,000, and the work had not been performed at the time Dawson
    forwarded the request to the board. It was Dawson’s recollection that Ken Brinar, PBC’s
    project manager, gave him the $5,000 figure for that extra work.
    1      There was conflict in the testimony and documentary evidence regarding PBC’s COR 1.
    5.
    Dawson testified he approached PBC to see if it could use the regraded soil as part
    of the preparation for the hydroseeding. According to Dawson, it was PBC’s obligation
    to haul the regraded materials away, but if PBC spread that excess soil on areas that had
    been damaged during the project, they could trade the value of that work. Dawson could
    not recall whether this was entirely an oral agreement or with whom he made that deal—
    nearly all of his conversations were with Brinar. In any event, that work-swap agreement
    was why he eliminated the $5,000 change order line item from pay estimate 6.2
    There were also disputes about the degree to which hydroseeding was part of the
    original specifications, and whether PBC’s failure to preserve the original sod and other
    turf damaged by PBC had caused the need for extensive regrading and hydroseeding.
    Meyer testified the specifications called for preservation of the park’s existing sod by
    rolling it up, putting it in storage, and keeping it healthy until it could be placed back in
    the park.
    Butters testified PBC had planned from the beginning to hydroseed the entire
    project after the work was completed, and that was how the project had been bid given
    the specifications. Butters claimed it was a “ridiculous specification” to cut the sod, save
    it for six months, and then place it back in the trenches—it would not have been possible
    to keep the sod alive during that time of the year.
    Dawson testified PBC had been all over the existing turf during the course of the
    project construction with equipment and had destroyed much or all of it; PBC had an
    2       In MCE’s response to PBC’s March 6, 2015, claim filed with District, MCE stated as
    follows: “Additional work was being considered by the District for grading behind the curb
    along Hwy. 58 and along Meadows Street. In anticipation of these costs, Brett Dawson included
    a new change order line in Pay Estimate No. 5 in the amount of $5,000,00. No payment was
    posted to this $5,000.00. Instead, later in the project an exchange of work value was agreed to
    and the change order was not needed, refer to item 15)b. Therefore, the line item was deleted on
    Pay Estimate No. 6. Estimates 2, 3, 4, 5 & 6 were technically short by $2,079.20. This was due
    [to] an error carried over from Pay Estimate No. 2. However, this was reconciled on Pay
    Estimate No. 7 when Liquidated Damages exceeded work value completed for that period.”
    6.
    obligation to maintain the existing lawn outside their work area, but failed to do so.
    Therefore, PBC had to hydroseed as a result of their mismanagement of the entire park,
    and PBC was instructed to prepare the ground prior to hydroseeding. Dawson said part
    of that ground preparation included rototilling the hard-pack and adjusting the soil’s pH
    levels. While this was not a direct requirement of the contract documents, it was work
    Dawson felt was required as a result of PBC’s inability to protect the existing landscape
    and assure viability of the new landscape. After hydroseeding, the grass did not appear
    healthy. Although the hydroseeding included fertilizer treatment, because the grass was
    not looking good, Dawson asked PBC to add fertilizer to the grass.
    Then there were continued disputes over why the hydroseed was not germinating
    properly. PBC claimed the seed mix selected by Dawson was not appropriate for the soil
    or the seed mix sold to PBC by Horizon (a materials supplier) was defective. There were
    also conflicts about the need for fertilizer, pH adjustments to the soil, the sprinkler
    schedule, adjustments to the irrigation controller, the amount of water the hydroseed
    needed, and whether PBC’s failures caused trees and shrubs to die.
    D.     Contractor Termination
    At the end of April 2014 and just prior to hydroseeding, Dawson generated a
    memo with a list of project clean-up items to be completed prior to the last pay estimate
    submission, typically referred to as a punch list. Brinar testified Dawson told him if PBC
    prepared for hydroseeding and it was accepted, if discussed items of clean-up were
    finished, and if the repair stripping of the parking lot was completed, Dawson and Meyer
    would deem this substantial completion of the project. Dawson disputed ever telling
    anyone at PBC that the project was substantially completed.
    On April 21, 2014, District’s board extended the project completion date to May 8,
    2014. Another punch list was issued by Dawson on May 7, 2014. When the project was
    not deemed complete on May 8, 2014, District began to impose liquidated damages.
    Dawson testified that as of May 8, 2014, he did not consider the 60-day maintenance
    7.
    period to have commenced. He believed the specifications indicated the maintenance
    period would begin when the project was deemed complete by District.
    On June 25, 2014, Dawson issued a notice ordering PBC to follow a specific work
    schedule for remaining project tasks. The notice indicated that the failure to meet any of
    these deadlines would result in the formal filing of a “‘notice to terminate the
    contractor.’”
    District imposed $54,000 in liquidated damages from May 9, 2014, to July 2,
    2014, when PBC took down its fencing around the park. On July 22, 2014, District
    issued a notice terminating PBC’s employment as contractor under section C-6 of the
    contract for delay in completion.
    District spent additional sums of money to complete the project and became
    involved in a pending lawsuit filed against District and PBC in November 2014 for
    money owed to Horizon for supplying the hydroseed. On December 29, 2014, District
    recorded a notice of completion of the project. Although there was outstanding money
    District owed to PBC on the final pay estimate, no payment to PBC was made. PBC
    claimed full payment of the outstanding contract price plus payment for extra work was
    due and owing by no later than February 2, 2015, and PBC filed a claim against District
    in March 2015, which District denied. PBC thereafter filed suit against District in May
    2015 for breach of contract, among other claims.
    II.    Procedural Background
    PBC’s complaint against District was amended twice. Following summary
    judgment, two claims remained: breach of contract and prompt payment penalties under
    Public Contract Code section 7107. The court granted District’s pretrial motion in limine
    to preclude PBC from presenting any evidence of uncompensated extra work without a
    written change order. The court concluded no evidence of extra work based on oral
    modification, waiver or estoppel was permitted pursuant to Katsura, supra, 
    155 Cal.App.4th 104
     and P&D Consultants, supra, 
    190 Cal.App.4th 1332
    .
    8.
    Following a bench trial, the court issued a statement of decision finding District
    breached the contract by failing to make final payment to PBC, but that no prompt
    payment penalties were owed. The court determined District was entitled to offset the
    contract price with liquidated damages, certain costs of completion, and for the money
    paid to settle the Horizon litigation, and judgment was entered in PBC’s favor for breach
    of contract in the amount of $27,566.53.
    DISCUSSION
    I.     Preclusion of Evidence of Oral Modification, Waiver, or Estoppel
    PBC argues the trial court erred in excluding all evidence extra work was
    performed at District’s request under theories of oral modification, waiver, or estoppel.
    “Generally, a trial court’s ruling on an in limine motion is reviewed for abuse of
    discretion. [Citation.] However, when the issue is one of law, we exercise de novo
    review.” (Condon-Johnson & Associates, Inc. v. Sacramento Municipal Utility Dist.
    (2007) 
    149 Cal.App.4th 1384
    , 1392; accord, Children’s Hospital Central California v.
    Blue Cross of California (2014) 
    226 Cal.App.4th 1260
    , 1277; see McIntyre v. The
    Colonies-Pacific, LLC (2014) 
    228 Cal.App.4th 664
    , 670 [“‘While trial judges ordinarily
    enjoy broad discretion with respect to the admission and exclusion of evidence in ruling
    on motions in limine [citation], a court's discretion is limited by the legal principles
    applicable to the case.’”].)
    A.     Background
    PBC contends California Supreme Court authority recognizes that private and
    public contracts are subject to the same rules of interpretation. Thus, regardless of
    whether the contract involves a public entity, written change order requirements for
    approving extra work are subject to modification by oral agreement or the parties’
    conduct under Civil Code section 1698. The written change order requirements may also
    be waived by the parties’ conduct, and under particular factual circumstances, the costs of
    extra work performed by a contractor may be awarded without a written change order
    9.
    under a theory of estoppel. To the extent Katsura and P&D Consultants hold differently,
    PBC argues they are factually distinguishable and/or contravene decisions issued by the
    California Supreme Court. PBC maintains Weeshoff Constr. Co. v. Los Angeles County
    Flood Control Dist. (1979) 
    88 Cal.App.3d 579
     (Weeshoff) properly applied principles of
    contract interpretation to conclude a written change order requirement in a public contract
    had been waived by the public entity, and the trial court should have followed Weeshoff
    rather than Katsura and P&D Consultants in deciding District’s motion in limine.
    PBC argues Dawson and Parsons issued oral change/extra work orders that
    modified the contract and caused PBC to incur extra costs, District waived the written
    change order requirement by approving and paying for other extra work without a written
    change order, and/or otherwise made promises that induced PBC to perform extra work
    that entitle PBC to recover under a theory of estoppel.
    District disputes that any evidence of oral modification, waiver or estoppel is
    admissible to prove extra work was authorized by District due to the written change order
    requirement. District contends that as a matter of law under P&D Consultants and
    Katsura, written change order requirements in public contracts cannot be modified orally
    or through conduct, waiver cannot apply, and recovery under the doctrine of estoppel is
    not permitted.
    B.     Legal Framework
    1.     General Contract Principles
    Pursuant to Civil Code section 1698, a contract in writing may be modified by an
    executed oral agreement or an oral agreement supported by new consideration so long
    as the statute of frauds is satisfied; and nothing in the statute precludes the application
    of law concerning estoppel or waiver, among other principles. (Civ. Code, § 1698,
    subds. (b)–(d).)
    Construction and works contracts often contain a provision that any extra work
    outside the scope of the contract performed by the contractor will be compensated only
    10.
    if a prior written change order was issued by the owner. If the contractor fails to obtain
    a written change order approving extra work, the contractor may argue the parties orally
    modified the written change order requirement. (Healy v. Brewster (1967) 
    251 Cal.App.2d 541
    , 552.) The contractor may also argue the owner freely and knowingly
    gave up the right to enforce the written change order requirement by oral or written
    agreement or by conduct showing the owner clearly gave up the right. (Ibid.; see
    Frank T. Hickey, Inc. v. L.A.J.C. Council (1954) 
    128 Cal.App.2d 676
    , 683 (Frank T.
    Hickey, Inc.).)
    The question presented by PBC is whether a written change order requirement in a
    public contract is subject to the principles of oral modification, waiver, or whether
    recovery for extra work without a change order is available under a theory of estoppel.
    As we discuss below, because public contracts are highly regulated and because public
    entities are governed by differing authority shaping the public entity’s ability to contract
    both in scope and mode, the ability to freely modify public contracts is very limited and
    will often be precluded. Nevertheless, where no statute, code, charter or other legal
    authority precludes it, or where no adopted public policy would be effectively nullified
    by it, theories of oral modification, waiver, or certain equitable remedies may be
    available in the public contract context.
    2.     Relevant California Supreme Court Public Contract Decisions
    The California Supreme Court has observed that California cases do not impose
    special rules of law simply because a governmental body is a party to a contract, and
    typically public contracts are subject to the same rules of interpretation as contracts
    between private parties. (M. F. Kemper Const. Co. v. City of L. A. (1951) 
    37 Cal.2d 696
    ,
    704–705 (Kemper); see Civ. Code, § 1635 [“All contracts, whether public or private, are
    to be interpreted by the same rules, except as otherwise provided by this code.”].)
    However, public contracts are governed and highly regulated by an array of
    statutes depending on the type of contract at issue, and public entities are subject to
    11.
    various statutes, codes, charters, ordinances, and regulations that govern the power and
    scope of their ability to contract. (See, e.g., Domar Electric Inc. v. City of Los Angeles
    (1994) 
    9 Cal.4th 161
    , 171 [“[A] charter city may not act in conflict with its charter.
    [Citations.] Any act that is violative of or not in compliance with the charter is void.”].)
    General contract principles may yield and theories of recovery may be deemed
    unavailable in the face of specific legal restrictions on public contracts and the public
    entity involved.
    In one of its early cases considering a public works contract, the California
    Supreme Court held ratification or estoppel was an available remedy even if the contract
    was improper under the entity’s charter. (Argenti v. City of San Francisco (1860) 
    16 Cal. 255
    , 266 (Argenti).) The court’s reasoning in this regard rested on the proposition that
    those doctrines of recovery were applicable to public corporations to the same extent as
    private corporations. (Ibid.)
    Two years after Argenti, however, the court reversed course in Zottman v. San
    Francisco (1862) 
    20 Cal. 96
     (Zottman). Extra work was directed on a public works
    contract, but without competitive bidding as required by the city’s charter. (Id. at p. 101.)
    As a result, the court held the contract for extra work was void, the contract could not be
    ratified nor was estoppel an available remedy. (Id. at pp. 105–106.) The court noted
    Argenti did not control because “the Justices who pronounce[d] the judgment [in Argenti]
    concurred only in the conclusion … [but] differed entirely in the grounds upon which
    they rested the liability of the city[.]” (Id. at p. 108.) Justice Cope, who authored
    Argenti, delivered a concurring opinion in Zottman and stated that “upon further
    reflection, I am convinced of the error of the reasoning upon which my conclusions were
    arrived at [in Argenti].” (Ibid. (conc. opn. of Cope, J.).) Justice Cope concluded the city
    could not act contrary to its charter and, thus, no recovery on the extra work could be
    obtained under any theory of implied liability. (Id. at pp. 108–109 (conc. opn. of Cope,
    J.).)
    12.
    More than 50 years later, the court reaffirmed the rule applied in Zottman:
    contracts that are formed beyond the powers of the public entity, or executed outside the
    legally required mode, are void. (Reams v. Cooley (1915) 
    171 Cal. 150
    , 154–157
    (Reams).) The Reams court held such contracts cannot be enforced, and no recovery
    under an implied theory for quantum meruit can be obtained.3 Reams involved a public
    works contract that had not been subject to the required competitive bidding process.
    (Reams, supra, at pp. 151–152.) When the public entity discovered the error, it refused to
    pay for the work performed under the contract, and the contractor filed suit. (Id. at
    p. 151.) The trial court denied recovery, and the Court of Appeal affirmed. (Id. at
    pp. 152–153.) On appeal before the California Supreme Court, the contractor argued that
    even if the contract was void due to the public entity’s lack of power to enter into such a
    contract without proper bidding, he was still entitled to recover under an implied contract
    theory in an action on quantum meruit. (Id. at p. 153.)
    The court rejected this argument on the ground that “no implied liability can arise
    for benefits received under a contract made in violation of the particularly prescribed
    statutory mode.” (Reams, supra, 171 Cal. at p. 154.) “Where the statute prescribes the
    only mode by which the power to contract shall be exercised, the mode is the measure of
    the power. A contract made otherwise than as so prescribed is not binding or obligatory
    as a contract and the doctrine of implied liability has no application in such cases.”
    (Ibid.) Thus, the court concluded that “[n]o contract, either expressly or impliedly, could
    be entered into by the [public entity] except with the lowest bidder after advertisement,
    and, of course, no implied liability to pay upon a quantum meruit could exist where the
    3       “Quantum meruit” refers to the well-established principle that the law implies a promise
    to pay for services performed under circumstances disclosing that they were not gratuitously
    rendered. (Huskinson & Brown v. Wolf (2004) 
    32 Cal.4th 453
    , 458.) To recover in quantum
    meruit, a party need not prove the existence of a contract, but must establish the circumstances
    were such that the services were furnished with some expectation by both parties that
    compensation for those services would be made. (Ibid.)
    13.
    prohibition of the statute against contracting in any other manner than as prescribed is
    disregarded.” (Id. at p. 156.)
    Following Reams, our high court reiterated that even if competitive bidding
    requirements are met or excused, if the contract is executed in a mode not within the
    public entity’s power, the contract is similarly void at inception and no doctrine of
    implied liability can be invoked for recovery. (Los Angeles Dredging Co. v. Long Beach
    (1930) 
    210 Cal. 348
     (Los Angeles Dredging).) “Certain general principles have become
    well established with respect to municipal contracts, … (1) The most important one is
    that contracts wholly beyond the powers of a municipality are void. They cannot be
    ratified; no estoppel to deny their validity can be invoked against the municipality; and
    ordinarily no recovery in quasi contract can be had for work performed under them.
    (2) It is also settled that the mode of contracting, as prescribed by the municipal charter,
    is the measure of the power to contract; and a contract made in disregard of the
    prescribed mode is unenforceable.” (Id. at p. 353, citing Reams, supra, 171 Cal. at
    p. 150, boldface omitted.)
    Based on these principles, the court in Los Angeles Dredging concluded that two
    oral contracts entered into by the city manager violated the charter’s requirement that
    such contracts be made only after competitive bidding. However, another charter
    provision allowed the city council to adopt a resolution authorizing the city manager to
    enter into a contract for emergency work without bids. Although no such resolution
    existed at the time the city manager entered into oral contracts for emergency work, the
    city council later passed a resolution ratifying the contracts made by the city manager as
    emergency acts. (Los Angeles Dredging, supra, 210 Cal. at p. 358.) The court held the
    doctrine of ratification applied because the ratification was within the powers of the
    municipality and performed in the manner originally prescribed. (Id. at pp. 358–359.)
    Without the emergency exemption from competitive bidding, however, the
    contract would not have been subject to ratification because the competitive bidding
    14.
    requirements could not be satisfied after the fact. (Los Angeles Dredging, supra, 210 Cal.
    at p. 359.) When bidding requirements are not satisfied, that contract is void at inception,
    there can be no recovery under an implied contract theory, the contract cannot be ratified,
    and no estoppel may be invoked against the municipality to deny its validity. (Miller v.
    McKinnon (1942) 
    20 Cal.2d 83
    , 87–88 (Miller).)4 Miller observed that “[p]ersons
    dealing with the public agency are presumed to know the law with respect to the
    requirement of competitive bidding and act at their peril.… If, as we have seen, the
    contract is absolutely void as being in excess of the agency's power, the contractor acts at
    his peril, and he cannot recover payment for the work performed .…” (Miller, supra,. at
    p. 89.)
    More recently, our Supreme Court held that when application of a theory of
    recovery generally available in private party contracts accomplishes an end run around
    statutory public contracting requirements (specifically, competitive bidding statutes),
    impairs the public policy underpinning the statutes, and implicates other public policy
    concerns, that theory of recovery is not applicable in the public contract setting. (Amelco
    Electric v. City of Thousand Oaks (2002) 
    27 Cal.4th 228
     (Amelco).)
    4       Miller expressly overruled Contra Costa Water Co. v. Breed (1903) 
    139 Cal. 432
     and
    Sacramento County v. Southern Pacific Co. (1899) 
    127 Cal. 217
     for the proposition that a
    municipality may not recover from the contractor payments made under a contract that is void
    for lack of compliance with the statutory bidding requirements. The Miller court explained that
    denying recovery to the municipality under such circumstances is based on estoppel, which does
    not apply when there is failure to comply with the bidding statute. (Miller, supra, 20 Cal.2d at
    pp. 90–91.) The court reasoned that the doctrine of implied liability applies where the general
    power by the public entity to contract on a subject exists and the form and manner of doing so is
    not expressly provided by charter or statute; but when the power to make a contract is statutorily
    limited to a prescribed method, any other method of contracting is expressly or impliedly
    prohibited and no implied liability can attach. (Id. at pp. 91–92.) A limited exception to this rule
    was enacted by the Legislature in 2004 under Public Contract Code section 5110, which allows a
    contractor to recover reasonable costs, excluding profit, for work performed under a contract
    later deemed invalid due to a defect in the bidding process caused solely by the public entity.
    15.
    In Amelco, an electrical contractor (Amelco) argued it had been subject to so many
    change orders on a public works project and the project was so different from what was
    originally specified by the city, the city had abandoned the contract. (Amelco, supra, 27
    Cal.4th at p. 235.) Although private parties may impliedly abandon a contract when they
    fail to follow change order procedures and when the final product differs substantially
    from the original, the court concluded the abandonment doctrine was fundamentally
    inconsistent with the purpose of the competitive bidding statutes. (Amelco, supra, 27
    Cal.4th at pp. 235, 239–240.) If the contract were set aside under the abandonment
    theory, then Amelco would be like a contractor who performed under a void contract.
    (Id. at p. 239.) The city could not simply contract for a quantum meruit payment, free
    from any other pre-contract requirements such as bidding the project. (Id. at pp. 238–
    239.)
    The court explained bidding statutes were meant to protect the public, but
    permitting recovery under abandonment would punish taxpayers by allowing changed
    projects to be negotiated without the benefit of any competitive bidding. (Amelco, supra,
    27 Cal.4th at pp. 239–240.) Practical considerations such as the difficulty of ascertaining
    precisely when abandonment of a contract occurs could delay notice of claims until the
    end of the project, creating uncertainty in budgeting and financing public projects. (Id. at
    p. 240.) Moreover, abandonment would incentivize contractors to bid unrealistically low
    with the hope of prevailing on an abandonment claim, based on the numerous changes
    inherent in any large public works project. (Id. at pp. 240–241.) Notably, the court
    rejected Amelco’s argument that abandonment applied because the city was liable for a
    breach of its agreements in the same manner as a private party. The court observed that
    while it was true the city was liable for breach in the same manner as a private party,
    recovery for specific breach is very different from abandonment where the entire contract
    is set aside and the contractor seeks recovery on a quantum meruit basis from the
    beginning of the project onward. (Id. at p. 242.)
    16.
    But Amelco does not bar all equitable remedies against public entities. If a theory
    of equitable recovery does not subvert public contracting law or the operation of a public
    policy adopted to protect the public, such recovery may be available. (Kemper, supra, 
    37 Cal.2d 696
    .) Kemper involved a mistake in a company’s (Kemper) bid for a public
    works project, which had the effect of omitting over $300,000 from the bid that was
    deemed irrevocable under the city’s charter. (Id. at pp. 699–700.) Having been alerted
    by Kemper to the mistake immediately after submission of the bid, the city knew the bid
    was in error, but accepted it anyway at the erroneously low price and attempted to hold
    Kemper to the mistake despite that it represented nearly one-third of the contract price.
    (Id. at p. 700.) Kemper refused to enter a contract at the mistaken bid price, so the city
    awarded the contract to the next lowest bidder, demanded forfeiture of Kemper’s bond,
    and Kemper filed suit to cancel its bid and obtain discharge of the bond. (Ibid.) The trial
    court entered judgment for Kemper, and, on appeal, the California Supreme Court upheld
    the judgment. (Id. at pp. 700, 702–705.)
    The Kemper court reasoned that the equitable remedy of recission was available
    under the circumstances. The mistake was of the clerical type from which recission is
    available, and the statement in the bid form that bidders would not be released on account
    of errors could be given effect by interpreting it as relating to errors of judgment rather
    than clerical mistakes. (Kemper, supra, 37 Cal.2d at pp. 703–704.)
    The court also rejected the city’s literal interpretation that its charter precluded
    bids from being withdrawn. The court noted that out-of-jurisdiction cases held rescission
    for mistake and relief from forfeiture may be had in public construction contracts, even
    when there were express contract or charter provisions making the bids irrevocable; and
    California cases had uniformly refused to apply a different or special rule simply because
    a governmental body is a party to a contract. (Kemper, supra, 37 Cal.2d at pp. 704–705.)
    Beyond recission for unilateral mistake, promissory estoppel has also been
    deemed available against a public entity in the pre-contract bidding context. (Kajima/Ray
    17.
    Wilson v. Los Angeles County Metropolitan Transportation Auth. (2000) 
    23 Cal.4th 305
    (Kajima).) The court in Kajima held a responsible bidder on a public contract who was
    wrongfully denied a contract could pursue damages against the public entity under a
    theory of promissory estoppel, but only bid preparation costs and not lost profits could be
    recovered. (Id. at p. 308.)
    The court explained that neither the doctrine of estoppel nor any other equitable
    principle may be invoked against a governmental entity where it would defeat the
    effective operation of a statute or policy adopted to protect the public. (Kajima, 
    supra,
     23
    Cal.4th at p. 316.) Because the competitive bidding statutes are enacted for the benefit of
    property holders and taxpayers, and were not meant to benefit or enrich bidders, they
    must be construed and administered to accomplish that purpose. (Id. at pp. 316–317.)
    Thus, awarding lost profits to a disappointed bidder would unduly punish the taxpaying
    public and provide an unfair windfall to bidders for efforts they did not make and risks
    they did not take. (Id. at p. 317.)
    In responding to the bidder’s argument that lost profits should be available
    because public and private contracts are governed by the same principles, the court
    concluded that, although that “may be” so, in the case of a wronged bidder there is no
    contract. (Kajima, supra, 23 Cal.4th at p. 317.) For recovery under a theory of
    promissory estoppel, the court explained it was responsible to determine the remedy
    justice required by considering the social consequences of any chosen remedy. (Id. at
    pp. 317–318.) The court reasoned allowing lost profits for a wrongfully denied contract
    could drain the public fisc in response to mere carelessness on the part of low level
    government officials. (Id. at p. 318.)
    Kemper, Amelco, and Kajima reflect twin principles that ordinary rules of implied
    contracts or equitable doctrines may be applied against the government (see Retired
    Employees Assn. of Orange County, Inc. v. County of Orange (2011) 
    52 Cal.4th 1171
    ,
    1176 (Retired Employees); U. S. Fid. & Guar. Co. v. State Bd. of Equal. (1956) 
    47 Cal.2d 18
    .
    384, 388–389), but only so long as that application does not effectively nullify a strong
    rule of policy adopted for the benefit of the public (City of Long Beach v. Mansell (1970)
    
    3 Cal.3d 462
    , 493; Amelco, 
    supra,
     27 Cal.4th at pp. 239–240). When it comes to public
    entity contracts that are ultra vires of a public entity’s legal authority to contract or a
    specified mode of contracting, it is clear the contract is void and no doctrine of estoppel
    or implied-in-fact contracts will apply. (See e.g., Reams, supra, 171 Cal. at pp. 156–157;
    Zottman, supra, 20 Cal. at pp. 102–105; Los Angeles Dredging, supra, 210 Cal. at p. 353
    [it is “settled that the mode of contracting, as prescribed by the municipal charter, is the
    measure of the power to contract; and a contract made in disregard of the prescribed
    mode is unenforceable”].)
    With this legal backdrop, we consider how written change order requirements in
    public contracts were considered in Weeshoff, Katsura, and P&D Consultants.
    3.      California Courts of Appeal
    The parties’ dispute focuses on which of three California appellate cases govern
    PBC’s claim the written change order requirement here was modified orally or by
    conduct, was waived by District, and/or that PBC may attempt to obtain recovery under
    the doctrine of estoppel. In Weeshoff, the court held a public entity’s conduct constituted
    waiver of a contractual written change order requirement authorizing extra work.
    (Weeshoff, supra, 88 Cal.App.3d at pp. 589–590.) Katsura and P&D Consultants
    distinguished Weeshoff and held no modification of a contract or its written change order
    requirement could be established. P&D Consultants broadly held “public contracts
    requiring written change orders cannot be modified orally or through the parties’
    conduct.” (P&D Consultants, supra, 190 Cal.App.4th at p. 1335.)
    Weeshoff involved a contractor who brought suit against a flood control district to
    recover damages purportedly due for extra work performed on a competitively bid public
    works contract. (Weeshoff, supra, 88 Cal.App.3d at p. 582.) The project involved
    construction on a section of Whittier Boulevard that was also a state highway. (Id. at
    19.
    p. 583.) The state required three lanes of traffic remain open on Whittier Boulevard
    during commuting hours and prohibited the use of temporary resurfacing on state
    highways. The contract likewise restricted the use of temporary resurfacing on state
    highways, and required any change orders be in writing. (Id. at pp. 583, 588.)
    During the project, a dispute arose about the three-lane requirement on a section of
    Whittier Boulevard. (Weeshoff, supra, 88 Cal.App.3d at p. 584.) Weeshoff had
    maintained the lanes with hard sand compact, but the district sent a memo stating sand
    was insufficient and ordered Weeshoff to fix it. (Ibid.) Weeshoff received another letter
    from the district the next day stating that if the road surface was not restored sufficiently,
    the district would restore it at Weeshoff’s expense and cancel the contract. (Id. at
    pp. 584–585.) About three days later, the district placed 18 tons of temporary resurfacing
    material at the site and later informed Weeshoff the temporary resurfacing costs would be
    subtracted from the final payment. (Id. at p. 585.) Disputes over the temporary
    pavement continued, and Weeshoff’s project superintendent was purportedly instructed
    by the district’s site manager to place temporary pavement at certain other locations. (Id.
    at pp. 586, 592.) No written change orders were issued regarding the temporary
    pavement. (Id. at p. 586.) The district ultimately refused to pay the extra costs associated
    with the temporary pavement, Weeshoff filed suit, and the trial court awarded Weeshoff
    damages for the extra costs incurred from the use of temporary pavement. (Ibid.)
    On appeal, the court affirmed the trial court’s findings that under these
    circumstances, the temporary resurfacing ordered by the district constituted a change in
    the contract terms; that by its conduct in threatening to cancel the contract if the hard-
    packed sand was not replaced and dumping 18 tons of temporary pavement at the job site,
    the conduct constituted a change order, and the district intended to waive the contractual
    provision requiring a written change order; and that the contractor was justified in
    believing the district had issued a valid change order through its conduct. (Weeshoff,
    supra, 88 Cal.App.3d at pp. 586–591.)
    20.
    The court observed that while California cases have generally upheld the necessity
    of compliance with contractual provisions regarding written change orders, written
    change order requirements may be waived if, by their conduct, the parties clearly assent
    to a change. For this proposition, the court cited two decisions involving private party
    contracts. (Weeshoff, supra, 88 Cal.App.3d at p. 589, citing C. F. Bolster Co. v. J. C.
    Boespflug Etc. Co. (1959) 
    167 Cal.App.2d 143
    , 150–151 & Frank T. Hickey Inc., 
    supra,
    128 Cal.App.2d at pp. 682–683.) The court reasoned the district had applied great
    pressure on Weeshoff to use temporary pavement, and dumping 18 tons of pavement on
    the roadway was conduct showing an intentional attempt to change the contract without a
    change order. (Weeshoff, supra, at pp. 589–590.) As a result, Weeshoff was permitted to
    recover its costs associated with the extra work performed without a written change
    order. (Id. at p. 592.)
    Twenty-eight years after Weeshoff, a different division of the Second District
    Court of Appeal decided Katsura. Katsura entered into an engineering consultant
    contract with the city which stated the maximum the city would pay for those services
    was $18,485 and required any modifications to be made only by mutual written consent
    of the parties. (Katsura, supra, 155 Cal.App.4th at p. 106.) The contract also authorized
    special work up to $1,850 for services not within the project scope. (Ibid.) Payments for
    such work were only to be made after issuance of a written notice to proceed signed by
    the city engineer. (Ibid.) Katsura’s first invoice to the city was for $2,943.25, which was
    paid; his second invoice was for $12,621.75, which was paid; his final invoice was for an
    additional $23,743.75, which the city refused to pay because it was beyond the contract
    price and it included unauthorized work. (Id. at pp. 106–107.)
    Katsura filed suit for money due, common count, account stated, and open book.
    (Katsura, supra, 155 Cal.App.4th at p. 107.) After a bench trial, the court found Katsura
    was entitled to recover judgment against the city for $2,920, the remaining amount of the
    $18,485 authorized under the contract. Katsura appealed arguing the full amount of the
    21.
    final invoice was due because the city breached the contract, waived its right to enforce
    the contract, or the contract was orally modified to authorize the special work. (Ibid.)
    The appellate court rejected each argument. (Id. at pp. 108–111.)
    The court first explained the city’s charter required city contracts to be made in
    writing, approved by the city council, and signed on behalf of the city by an officer
    designated by the council. (Katsura, supra, 155 Cal.App.4th at p. 108.) The charter
    permitted the city to pass a resolution or ordinance allowing the city manager to authorize
    contracts with or without a writing for the acquisition of equipment and other items
    within a budget approved by the council. (Ibid.) By resolution, the city manager was
    authorized to enter into contractual relationships up to $25,000 for the relevant fiscal
    year. (Ibid.) The city manager had delegated his authority to sign contracts to
    department heads, including the public works director who signed Katsura’s contract on
    behalf of the city. (Ibid.)
    The court then explained no contract could be enforced against the city that its
    charter prohibited. (Katsura, supra, 155 Cal.App.4th at pp. 108–109.) Katsura claimed
    the extra work he performed, as reflected on the third invoice, had been requested by a
    city engineer and an outside consultant, and these requests amounted to an oral
    modification of the contract. (Id. at p. 108.) The court observed there was no provision
    in the charter for the execution of oral contracts by employees of the city who do not
    have requisite authority; thus, these purported oral agreements were void. (Id. at p. 109.)
    As to Katsura’s theory of recovery based on an implied-in-law contract, the court
    held that because the oral agreements were void under the charter, no implied-in-law or
    quasi-contract theory could apply. (Katsura, supra, 155 Cal.App.4th at pp. 109–110.)
    The court explained that as held by the California Supreme Court, “‘“‘the law never
    implies an obligation to do that which it forbids the party to agree to do.’”’” (Id. at
    p. 110, quoting Reams, supra, 171 Cal. at p. 156; accord, Zottman, supra, 20 Cal. at
    p. 106; Amelco, 
    supra,
     17 Cal.4th at p. 235.) The court cited Amelco for the proposition
    22.
    that contracts disregarding applicable code provisions are beyond the power of the city to
    make. (Katsura, supra, at p. 110.)
    Katsura relied on Weeshoff, but the court found Weeshoff inapplicable and
    factually distinguishable in several regards. (Katsura, supra, 155 Cal.App.4th at
    pp. 110–111.) The Katsura court also questioned the viability of Weeshoff’s statement
    that written change order requirements could be waived by the parties’ conduct because
    the cases Weeshoff cited for this proposition involved private contracts, not public
    contracts. (Katsura, supra, at p. 111.) Given that the oral modification alleged by
    Katsura was prohibited by the city’s charter, the “great weight of authority” (ibid.) was
    contrary to Weeshoff in this regard. The “great weight of authority” referred to in
    Katsura included Reams, Zottman, Amelco and Los Angeles Dredging, among others.
    (See Katsura, supra, at pp. 108–110.)
    Finally, the court noted Katsura was not the victim of an innocent mistake: he
    admitted he performed the extra work knowing it was outside the scope of the contract,
    and he had actual knowledge of the process for obtaining authorization for extra work
    because he had been involved with the city on a previous contract and had submitted
    written requests authorizing extra work. (Katsura, supra, 155 Cal.App.4th at p. 111.)
    The holding in Katsura was extended by the court in P&D Consultants. There, a
    civil engineering firm (P&D) brought suit against the City of Carlsbad for breach of
    contract, breach of implied contract, quantum meruit, and violation of prompt payment
    statutes, seeking to recover for services on the redesign of a municipal golf course.
    (P&D Consultants, supra, 190 Cal.App.4th at pp. 1336–1337.) The parties’ written
    contract defined the scope of work and set a contract price. (Id. at p. 1336.) Importantly,
    it also provided that there could be no amendments, modifications or waivers of the
    contract terms absent a written agreement signed by both parties, and it contained an
    integration clause that the contract and any written agreements thereto embodied the
    parties’ entire agreement. (Ibid.)
    23.
    During the course of the work, the parties entered into five different amendments
    that increased the contract price. (P&D Consultants, supra, 190 Cal.App.4th at
    pp. 1336–1337.) In each of the first four amendments, P&D would submit a proposed
    change order with a fixed contract price to the city’s project manager (Cahill) and he
    would provide the city with the information for the preparation of an amendment. (Id. at
    p. 1336.) Usually, the city took several weeks to execute an amendment, and Cahill often
    authorized P&D to begin the extra work before it received the executed amendment.
    (Ibid.)
    The fifth written amendment resulted from a series of negotiations between P&D
    and Cahill. (P&D Consultants, supra,. 190 Cal.App.4th at pp. 1336–1337.) P&D sought
    additional money to complete the contract, but Cahill communicated there was only
    $100,000 left in the budget, and no further costs would be authorized nor should be
    needed to finish the design package. (Id. at p. 1337.) As finally approved, the fifth
    amendment authorized $99,810 of additional work. (Ibid.) The written amendment
    stated the intent of the parties was that the amendment was to provide all final and
    complete services by the city to bid the project, and that no additional compensation was
    to be requested nor would it be approved by the city related to this scope of work. (Ibid.)
    P&D began work several weeks before the city executed the fifth amendment, at
    Cahill’s direction, which had been the parties’ customary practice with prior
    amendments. (P&D Consultants, supra, 190 Cal.App.4th at p. 1337.) After the fifth
    amendment was executed, however, P&D sought more money from the city for
    additional work purportedly not included in the amendment. (Ibid.) The city refused to
    pay, and P&D filed suit seeking to recover another $100,000 for extra work it performed
    outside the scope of the fifth amendment. (Ibid.)
    P&D’s trial theory was that the contract’s written change order requirement was
    modified by Cahill’s oral authorization of the extra work for which it sought payment,
    and by the parties’ conduct in handling the amendments. (P&D Consultants, supra, 190
    24.
    Cal.App.4th at p. 1337.) Over the city’s objection, the jury was instructed on P&D’s oral
    modification theory of breach, and the jury returned a verdict for P&D. (Id. at p. 1339.)
    The city appealed after posttrial motions were denied, and argued the trial court erred in
    finding the contract could be modified orally or through the parties’ conduct in handling
    the amendments and allowing the matter to go to the jury on that theory. (Id. at pp. 1335,
    1339.) The city argued there was no written change order for the extra work P&D
    performed after the fifth amendment, in violation of the contract itself and Government
    Code section 40602, which required a general law city (as Carlsbad was at that time) to
    execute its contracts with the signature of the mayor or a designee as provided by
    ordinance. (Id. at p. 1335, fn. 1.)
    Relying entirely on Katsura, the court concluded that while Katsura involved a
    purported oral modification of a public contract, its reasoning was applicable to a
    purported modification through conduct—implied-in-fact. (P&D Consultants, supra,
    190 Cal.App.4th at pp. 1340–1341.) The court explained the parties’ contract limited the
    city’s power to contract to the prescribed method, and by relying on Cahill’s oral
    authorization or direction to perform extra work without a change order, P&D acted at its
    peril. (Id. at pp. 1341–1342.) The court noted the purpose of including a written change
    order requirement in a municipal works contract is to protect the public fisc from the type
    of situation that had occurred between the parties. (Id. at p. 1342.) Notably, however,
    the court did not reach the city’s argument that any contract modification P&D alleged
    with respect to the extra work would be void under Government Code section 40602
    because it was not signed by the mayor or his designee. (Id. at p. 1335, fn. 1.)
    The court distinguished Weeshoff factually, noting the parties’ contract in
    Weeshoff included a provision allowing extra work to proceed without a fully agreed-
    upon change order while P&D’s contract with the city unambiguously prohibited
    commencement of extra work without written authorization. (P&D Consultants, supra,
    190 Cal.App.4th at p. 1342.) The court also echoed Katsura’s criticism of Weeshoff as
    25.
    citing contract cases involving private parties and not public entities, and that the legal
    proposition a written change order requirement could be waived was “‘contrary to the
    great weight of authority .…’” (Id. at p. 1342, quoting Katsura, supra, 155 Cal.App.4th
    at p. 111.)
    Finally, the court distinguished Kemper, supra, 37 Cal.2d at pages 699 to 700,
    because P&D’s case did not concern relief from a mistaken bid that caused the
    municipality no damage. (P&D Consultants, supra, 190 Cal.App.4th at p. 1343.) While
    Kemper noted California cases have refused to apply special rules of law simply because
    a government body is party to the contract, the court was unconvinced this meant that
    contract modification in the private sector applies equally to public contracts, pointing to
    Amelco’s acknowledgment that “‘public works contracts are the subject of intensive
    statutory regulation and lack the freedom of modification present in private party
    contracts.’” (P&D Consultants, supra, at p. 1343, quoting Amelco, 
    supra,
     27 Cal.4th at
    p. 242.)
    C.     Analysis
    PBC contends that, given the longstanding prohibition on public entities
    contracting in a manner or mode outside their authority as limited by charter, statute, or
    code, Katsura could not have been decided differently. However, because there were no
    such limits on the contracting authority of the public flood district in Weeshoff, and
    because no special rules of interpretation apply to public contracts simply because one of
    the parties is a public entity, the principle of waiver was properly applied in Weeshoff.
    PBC argues the holding in P&D Consultants is not supported by Katsura because there
    was no similar statute, charter, or code prohibiting the city from entering into implied-in-
    fact contract modifications.
    In many respects, Katsura is a straightforward application of the principles
    recognized in Zottman, Reams, and Los Angeles Dredging: a public entity contract is
    void if entered into through a prohibited mode, and the contract cannot thereafter be
    26.
    enforced under an implied-in-law or quasi-contract theory. Weeshoff, on the other hand,
    involved the Los Angeles Public Flood District, which is a public entity not governed by
    the same charter requirements as the City of San Buenaventura in Katsura. The facts of
    Weeshoff do not indicate any legal prohibition on the district’s ability to modify its
    agreement with Weeshoff through its conduct and waive the written change order
    requirement. The long line of authority that dictated the outcome in Katsura simply was
    not relevant to the facts in Weeshoff.
    Katsura noted the viability of Weeshoff was questionable in holding that the
    application of waiver could apply to public contracts. (Katsura, supra, 155 Cal.App.4th
    at p. 111.) But, rather than stating a broad rule that no implied contract or waiver could
    ever be recognized in the public contract context, Katsura’s statement in this regard is
    better understood as recognizing the reality that the doctrine of waiver applied in
    Weeshoff is unlikely to be applicable in many public contracts due to the laws that restrict
    and govern public entities’ contracting abilities. Such an interpretation of Katsura’s
    discussion of Weeshoff is consistent with the observation in Amelco that public contracts
    lack the freedom of modification present in private party contracts (Amelco, supra, 27
    Cal.4th at p. 242), and the recognition in Retired Employees that government entities may
    be bound by implied-in-fact contracts so long as no statute or law prohibits it (Retired
    Employees, supra, 52 Cal.4th at p. 1176).5 Neither the facts of Katsura nor the case
    authority underpinning its determination preclude any and all oral modification of a
    5       Although dicta in Green Valley Landowners Assn. v. City of Vallejo (2015) 
    241 Cal.App.4th 425
     characterized Katsura as holding “all implied contracts against public entities
    are barred because, by definition, they have not formally been approved by the entity” (id. at
    p. 438), we do not agree Katsura’s holding is that broad, and even if it were, it would seemingly
    contravene the California Supreme Court’s holding in Retired Employees recognizing, albeit in
    the public employment context, that “a county may be bound by an implied contract under
    California law if there is no legislative prohibition against such arrangements, such as a statute or
    ordinance.” (Retired Employees, supra, 52 Cal.4th at p. 1176; see Youngman v. Nevada
    Irrigation Dist. (1969) 
    70 Cal.2d 240
    , 246 [“Governmental subdivisions may be bound by an
    implied contract if there is no statutory prohibition against such arrangements.”].)
    27.
    written change order requirement in a public contract where no statute, code, ordinance
    or charter prohibits it.
    Nor is P&D Consultants persuasive for its broad holding that “public contracts
    requiring written change orders cannot be modified orally or through the parties’
    conduct.” (P&D Consultants, supra, 190 Cal.App.4th at p. 1335.) There, the court did
    not decide whether the city was precluded by any statute or code from modifying the
    contract as alleged (through conduct). Instead, without citation to any authority beyond
    Katsura, the court concluded the plain language of the contract limited the city’s power
    to contract to a certain prescribed method. (Id. at p. 1341.) Yet, the contract itself is not
    a source of public contracting law nor is it legal authority limiting the ultimate scope of
    the city’s contracting powers, and we find no support for the proposition that a contract
    itself may limit or proscribe a public entity’s ultimate power to contract.
    P&D Consultants also echoed Katsura’s criticism of Weeshoff’s application of
    waiver as against the great weight of authority (P&D Consultants, supra, 190
    Cal.App.4th at p. 1342), but the authority cited by Katsura involved or discussed
    contracts that were void as ultra vires of the public entity’s ability to contract in scope or
    mode as provided by statute, charter, or code. (Katsura, supra, 155 Cal.App.4th at
    pp. 108–110, citing Domar Electric, Inc. v. City of Los Angeles, 
    supra,
     9 Cal.4th at
    p. 171, Los Angeles Dredging, supra, 210 Cal. at p. 353, Amelco, 
    supra,
     27 Cal.4th at
    pp. 234, 242, G. L. Mezzetta, Inc. v. City of American Canyon (2000) 
    78 Cal.App.4th 1087
    , 1093–1094 & Reams, supra, 171 Cal. at pp. 156–157.) In this case, District
    presents no argument how any oral or implied-in-fact modification of the written change
    order requirement was precluded by statute or District’s governing document of
    incorporation and thus rendered void as a matter of law.
    Beyond that, P&D Consultants distinguished Weeshoff on a factual basis for
    which there is no similar distinction here. The public entity’s contract with Weeshoff
    allowed for extra work without a fully agreed-upon written change order that P&D
    28.
    Consultants contrasted with the contract before it that unequivocally required any
    changes to be approved by prior written amendment executed by both parties. (P&D
    Consultants, supra, 190 Cal.App.4th at pp. 1336, 1342.) Unlike P&D Consultants, the
    written extra work order requirement here is extremely similar to that in Weeshoff. In
    Weeshoff, while any change was to be made in writing, if there was a disagreement about
    price for the extra work, the work could be directed without a negotiated price and paid
    for based on an extra work payment schedule within the contract that provided
    compensation for labor, material, equipment and other services. (Weeshoff, supra, 88
    Cal.App.3d at p. 588, fns. 3 & 4.) Similarly here, though no extra work was to be paid
    unless ordered in writing, if the price could not be fixed “before order for the extra work”
    was issued, section C-10 provides that the contractor was to be paid based on the same
    type of extra work payment schedule as in Weeshoff. Moreover, any amendment to the
    contract in P&D Consultants had to be executed by the city, but here and in Weeshoff, the
    engineer had express contractual authority to issue change/extra work orders without the
    written approval of the public entity.
    District argues P&D Consultants’s holding is consistent with generally recognized
    principles that the purpose of a written change order is to protect the public entity and
    taxpayer money from uncertainty that arises when contractors perform unauthorized work
    without a set budget or established price, and it avoids the painstaking process of finger
    pointing over payment for additional work months and years after performance and
    completion of the project.
    Written change order requirements in public contracts certainly serve these
    important ends, but District has pointed to no legal obligation that written change order
    requirements be included in public contracts; as a matter of adopted public policy or that
    applying theories of modification, waiver or estoppel would implicate the kind of
    significant public policy concerns discussed in Amelco with respect to abandonment.
    (See Amelco, 
    supra,
     27 Cal.4th at pp. 239–241.) As we have already observed, many
    29.
    public entities will not be permitted by their charter or by statute or code to engage in oral
    modifications or impliedly waive written change order requirements, nor will estoppel
    apply as Katsura illustrates. Contractors who undertake extra work without a written
    change order in such cases will do so at their peril because they are charged with
    knowledge of contracting law that binds the public entity. (See Miller, supra, 20 Cal.2d
    at p. 89.)
    Moreover, written change order requirements are not rendered meaningless simply
    because they may be susceptible to oral modification or waiver in rare instances. As
    Weeshoff pointed out, written change order requirements are generally upheld.
    (Weeshoff, supra, 88 Cal.App.3d at p. 589.) Thus, even though oral modification,
    implied-in-fact contracts, or doctrines of waiver and estoppel may be invoked where not
    in violation of the public entity’s contracting authority or adopted public policy, it does
    not mean the written change order requirement is unenforceable or can be waived by any
    purported agent of a public entity. Weeshoff explained waiver applied in that case
    because the district itself had engaged in conduct that constituted the issuance of a change
    order and waiver of the written change order requirement. (Id. at p. 590, fn. 5.)
    Although a site inspector had purportedly told Weeshoff to use temporary pavement, the
    site inspector had no contractual authority to issue any change to the contract even by
    written order. (Ibid.)
    For this reason, although P&D Consultants’s broad holding that public contracts
    requiring written change orders cannot ever be modified orally or through the parties’
    conduct is not persuasive, there is little reason to doubt the ultimate outcome there was
    correct. In that case, the city’s project manager had purportedly told P&D to proceed
    with extra work before the execution of written amendments later signed by the city.
    Yet, there is nothing in the facts suggesting the project manager had the authority,
    through the contract or otherwise, to approve an amendment on behalf of the city; the
    contract required the written approval of the city. (See J. M. Griffith Co. v. City of Los
    30.
    Angeles (1898) 
    6 Cal.Unrep. 119
    , 123 (per curiam) [engineer’s oral direction to
    contractor to perform extra work could not bind the city under the contract terms (which
    required approval by the city for changes), or the city’s charter]; Bares v. City of Portola
    (1954) 
    124 Cal.App.2d 813
    , 820 [engineer’s oral direction to contractor to perform extra
    work not binding on the city because the contract required a written order by the engineer
    pursuant to the authorization of the city]; Contra Costa Const. Co. v. Daly City (1920) 
    48 Cal.App. 622
    , 624–625 [the city engineer’s oral directions to contractor to perform extra
    work not binding on the city because contractually extra work would not be paid for
    unless authorized by resolution of the city’s board of trustees and the city charter did not
    authorize engineers to contract on behalf of the city].) This distinguishes P&D
    Consultants from the contracts here and in Weeshoff where contractual authority to issue
    change/extra work orders was vested with the engineer and not expressly contingent on
    agreement by the public entity.6
    In sum, without any showing District’s contracting authority was legally limited in
    scope or mode such that it was precluded from orally modifying the contract or waiving
    any written change requirement, Katsura simply does not apply. Further, P&D
    Consultants does not provide a persuasive basis to extend Katsura into a bright-line rule
    that no written change order requirement in a public contract could ever, as a matter of
    law, be modified by conduct or oral agreement. Moreover, P&D Consultants did not
    preserve for appeal any argument related to waiver or estoppel, and P&D Consultants
    expressly refused to decide the applicability of those doctrines. (P&D Consultants,
    supra, 190 Cal.App.at p. 1344.) Within the narrow circumstances of this case, PBC was
    not precluded as a matter of law from presenting evidence the written change order
    6       District points out a petition for review of the decision in P&D Consultants was filed, but
    the California Supreme Court denied it, which District argues reflected a conscious decision by
    our high court to allow P&D Consultants to remain in force and effect with regard to future
    circumstances like those in this case. Nevertheless, we are not persuaded the rule formulated in
    P&D Consultants as an extension of Katsura is as broad as P&D Consultants held.
    31.
    requirement had been modified orally or by conduct of the engineer or District, or that
    waiver or estoppel could be applied.
    Finally, because all evidence pertaining to oral modification, waiver, or estoppel
    was precluded as to alleged extra work, it cannot be determined the exclusion was
    harmless. The testimony is incomplete as to the circumstances under which extra work
    was purportedly requested, and there is no testimony or findings whether any of the
    purported extra work was actually outside the scope of the contract. Notably, there is
    evidence that at least some of the extra work claimed by PBC was performed knowing
    the engineer had deemed the work within the scope of the contract—e.g., the dispute over
    imported soil for the excavated tree wells.7
    The parties have not had an opportunity to address these issues or present evidence
    in this regard, and so it is incumbent upon us to remand for a new trial. In reversing
    judgment and remanding this matter to the trial court we express no opinion as to whether
    any purported extra work was actually outside the scope of the contract, whether the
    written change order requirement was modified or waived by District or its engineer, or
    whether estoppel is appropriate.
    II.    Remaining Issues
    The parties dispute additional issues regarding the permissibility of liquidated
    damages, whether the lack of notice of withheld amounts of the contract price precluded
    any withholding by District, and whether prompt payment penalties should have been
    assessed. Even to the extent they involve questions of law, the contours of these disputes
    7       In the event PBC disputed the engineer’s instructions or directions as involving extra
    costs not included in the contract price, section C-29 of the contract required PBC to file a claim
    with the engineer for those costs within 15 days of receipt of such instructions by the engineer, or
    the claim would be deemed waived. There is no evidence PBC ever filed such a claim for work
    the engineer deemed within the scope of the contract but PBC believed involved extra costs not
    contemplated by the contract.
    32.
    may be affected by determinations related to PBC’s claims of extra work for which a new
    trial is required. Thus, we do not reach the remaining disputed issues.
    DISPOSITION
    The trial court’s judgment is reversed and the case is remanded to the trial court
    for further proceedings consistent with this opinion. PBC is awarded its costs on appeal.
    (Cal. Rules of Court, rule 8.278, subd. (a)(1).)
    MEEHAN, J.
    WE CONCUR:
    PEÑA, Acting P.J.
    DeSANTOS, J.
    33.