Hewlett-Packard Co. v. Benton County Assessor , 357 Or. 598 ( 2015 )


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  • 598	                          August 6, 2015	                           No. 30
    IN THE SUPREME COURT OF THE
    STATE OF OREGON
    HEWLETT-PACKARD COMPANY,
    Plaintiff-Respondent,
    v.
    BENTON COUNTY ASSESSOR,
    Defendant,
    and
    DEPARTMENT OF REVENUE,
    Defendant-Appellant.
    (TC4979, TC4980, TC4987;
    S061456 (Control), S061457, S061458)
    En Banc
    On appeal from the Oregon Tax Court.*
    Henry C. Breithaupt, Judge.
    Argued and submitted on June 24, 2014.
    Joseph A. Laronge, Assistant Attorney General, Salem,
    argued the cause and filed the briefs for appellant. With him
    on the brief was Ellen Rosenblum, Attorney General.
    David L. Canary, Garvey Schubert Barer, Portland,
    argued the cause for the respondent. Cynthia M. Fraser
    filed the brief for the respondent. With her on the brief was
    David L. Canary and William K. Kabeiseman.
    BALMER, C. J.
    The judgment of the Oregon Tax Court is affirmed.
    Case Summary: The Department of Revenue sought direct judicial review of
    a decision of the Tax Court determining the real market value of real property.
    Held: (1) the department’s rules require the real market value of real property to
    be based on the property’s highest and best use; (2) the department’s rule defin-
    ing “value of the loss,” OAR 150-308.205-(F)(3)(k), must be applied consistently
    with the Tax Court’s highest and best use determination.
    The judgment of the Oregon Tax Court is affirmed.
    ______________
    *   
    21 OTR 186
     (2013).
    Cite as 
    357 Or 598
     (2015)	599
    BALMER, C. J.
    In this direct appeal from the Oregon Tax Court
    Regular Division (Tax Court), we must decide whether the
    Tax Court properly applied administrative rules governing
    property tax appraisals. Specifically, this case requires us
    to consider the relationship between two terms defined in
    the Department of Revenue’s administrative rules: “highest
    and best use” and “value of the loss.” See OAR 150-308.205-
    (D)(1)(c) (defining highest and best use); OAR 150-308.205-
    (F)(3)(k) (defining value of the loss). A property’s highest
    and best use is, among other things, the most profitable use
    that a potential owner could make of the property. The value
    of the loss measures the negative value created by compo-
    nents of the property that prevent it from cost-effectively
    serving its highest and best use.
    The department appeals from a decision of the
    Tax Court that accepted the property valuation proposed
    by taxpayer Hewlett-Packard (HP). In reaching that con-
    clusion, the Tax Court held that the highest and best use
    of HP’s property was a continuation of its current use as
    a single-tenant, owner-occupied research and manufactur-
    ing facility. The Tax Court also held that, of the numerous
    buildings on the campus, a potential owner would anticipate
    using only certain “core” buildings and would not anticipate
    using the “non-core” buildings. As a result, those non-core
    buildings were components of the property that prevented
    it from cost-effectively serving its highest and best use. The
    Tax Court, therefore, assessed the value of the loss caused
    by the presence of the non-core buildings. To do so, the Tax
    Court calculated the additional operating expenses that an
    owner would incur while operating the subject property—
    which has both the core and non-core space—as compared
    to the operating expenses that an owner would incur while
    operating a cost-effective version of the property consisting
    of only the core space.
    In this appeal, the department does not challenge
    the Tax Court’s findings that the non-core buildings were
    an overdevelopment or that the highest and best use of the
    property was as a single-tenant, owner-occupied research
    and manufacturing facility. Instead, the department raises
    600	         Hewlett-Packard Co. v. Benton County Assessor
    the narrow issue of whether the Tax Court properly applied
    the administrative rule defining the value of the loss,
    OAR 150-308.205-(F)(3)(k). According to the department,
    the Tax Court erred by calculating the value of the loss
    as if a potential owner would make no alterations to the
    subject property. The department contends that the Tax
    Court should have calculated the value of the loss as if a
    potential owner would convert the non-core space into mar-
    ketable rental space, which, according to the department,
    would result in more value than leaving the non-core space
    vacant.
    We reject the department’s argument because it
    presumes that the most valuable use of the non-core build-
    ings is as marketable rental space. That presumption is
    inconsistent with the Tax Court’s analysis of the highest
    and best use of the property. The department, however, does
    not challenge that analysis. That is, the department does
    not ask us to review the factual basis for the Tax Court’s
    determination that the highest and best use of the property
    is as a single-tenant, owner-occupied research and manufac-
    turing facility or the Tax Court’s application of the depart-
    ment’s administrative rules that govern the highest and
    best use determination. See ORS 305.445 (scope of review).
    As a result, we assume that the highest and best use of the
    non-core buildings is to leave them unaltered rather than
    to convert them to marketable space. Given that assump-
    tion, the Tax Court properly identified the value of the loss
    as the additional operating expenses that an owner would
    incur to operate the subject property compared to a more
    cost-effective option. We therefore affirm the decision of the
    Tax Court.
    The department’s rules defining the highest and
    best use and the value of the loss are part of a complex
    scheme of administrative rules outlining the methods and
    procedures that the department requires for appraising
    industrial plants, like HP’s property. See generally OAR
    150-308.205-(D) (describing the valuation process); OAR
    150-308.205-(F) (describing methods for valuing property
    inefficiencies). To assess the department’s contention that
    the Tax Court misapplied those rules, we must consider how
    the highest and best use and the value of the loss fit within
    Cite as 
    357 Or 598
     (2015)	601
    the department’s larger scheme of methods and procedures
    as well as the Tax Court’s relevant factual findings.
    The subject property is HP’s 178-acre manufactur-
    ing and research campus in Corvallis, Oregon. HP pays
    taxes on both its real property and personal property. The
    real property consists of the land and its improvements.
    The personal property is HP’s equipment located on site. In
    this case, the parties dispute the value of the real estate
    improvements for the three tax years beginning in 2008 and
    ending in 2011.
    Those improvements include 28 buildings contain-
    ing about 2 million square feet. The buildings share common
    utilities and are linked by a long corridor. HP constructed
    the buildings between the 1970s and the 1990s and has used
    the buildings to support as many as 8,000 employees while
    developing and manufacturing parts for scientific calcula-
    tors and ink-jet printers. By 2007, however, HP had reduced
    the number of components manufactured at that property
    and needed only about 2,000 employees on site. At that
    time, HP identified the property’s “core space” as 1.2 mil-
    lion square feet contained in 17 buildings. The remaining
    800,000 square feet was identified as the “non-core” space.
    Over the next couple of years, HP consolidated its operations
    into the core space and vacated the non-core space. After the
    consolidation, HP began leasing out a small portion of the
    recently vacated non-core space to outside firms.
    For the tax years of 2008-09 and 2009-10, Benton
    County assessed the total value of the improvements at
    $76 million and $79 million respectively. HP did not chal-
    lenge those assessments but asked the Tax Court to review
    Benton County’s assessment of HP’s equipment on the prop-
    erty. Benton County counterclaimed, contending that it had
    undervalued the improvements in 2008-09 and 2009-10.
    For the next tax year, 2010-11, Benton County assessed the
    value of the improvements at $200 million.
    After a partial settlement resolving the value of
    HP’s equipment, the parties presented evidence to the Tax
    Court on the only remaining issue—the extent to which HP’s
    improvements contributed to, or detracted from, the “real
    market value” of HP’s property. See ORS 308.232 (requiring
    602	              Hewlett-Packard Co. v. Benton County Assessor
    “ad valorem property taxation” to be based on the proper-
    ty’s “real market value”). Generally, a property’s real market
    value is the amount of money an informed and disinterested
    seller could reasonably expect an informed and disinterested
    buyer to pay for the property on the date of the assessment.
    See ORS 308.205(1) (defining real market value).
    To find how much a potential buyer would pay to
    own the property, an appraiser must follow the appraisal
    methods and procedures adopted by the department. ORS
    308.205(2) (requiring a property tax appraisal to be com-
    pleted “in accordance with rules adopted by the Department
    of Revenue”). The department’s rules call for an appraiser to
    value the property according to its “highest and best use.”
    OAR 150-308.205-(D)(3)(i) (“Determining the highest and
    best use for the unit of property is necessary for establishing
    real market value.”). The department requires valuing prop-
    erty according to its highest and best use because a seller
    “can expect to receive the highest offer from a prospective
    buyer who intends to put the property to its most profitable
    use.” STC Submarine, Inc. v. Dept. of Rev., 
    320 Or 589
    , 592
    n 5, 890 P2d 1370 (1995).
    The department defines “highest and best use” as
    “the reasonably probable and legal use of vacant land or an
    improved property that is physically possible, appropriately
    supported, and financially feasible, and that results in the
    highest value. See The Appraisal of Real Estate, 12th edi-
    tion (2001).” OAR 150-308.205-(D)(1)(c).1 To find a proper-
    ty’s highest and best use, an appraiser identifies the prop-
    erty’s potential alternative uses and tests them against the
    criteria set out in the department’s definition of highest and
    best use. Those alternative uses “may include, among oth-
    ers, all possible uses that might result from retaining, alter-
    ing or ceasing the integrated nature of the unit of property.”
    OAR 150-308.205-(D)(3)(i). For an improved property, those
    alternative uses often consist of “continuation of the existing
    1
    The last criterion, requiring that the highest and best use “result[ ] in the
    highest value,” OAR 150-308.205-(D)(1)(c), is frequently described as requir-
    ing that the use be “maximally productive.” See, e.g., Appraisal Institute, The
    Appraisal of Real Estate 307, 314, 318 (12th ed 2001) (referring to a use as being
    “maximally productive” or resulting in the “maximum productivity”). We under-
    stand the terms “highest value” and “maximally productive” as having the same
    meaning in this context.
    Cite as 
    357 Or 598
     (2015)	603
    use, renovation or rehabilitation, expansion, adaptation or
    conversion to another use, partial or total demolition, or
    some combination of these alternatives.” Appraisal of Real
    Estate at 315.2
    An appraiser uses the results from the highest and
    best use analysis to produce a final valuation opinion. See
    id. at 60 (“Through the highest and best use analysis, the
    appraiser * * * identifies the use or uses on which the final
    opinion of value is based.”). As a result, “[t]he first issue is
    the highest and best use of the property; the second issue is
    the market value of the property at that use.” Freedom Fed.
    Savings and Loan v. Dept. of Rev., 
    310 Or 723
    , 727, 801 P2d
    809 (1990) (emphasis in original); see also Appraisal of Real
    Estate at 305 (“[H]ighest and best use can be described as
    the foundation on which market value rests.”).
    After establishing the property’s highest and best
    use, an appraiser develops a final opinion of the property’s real
    market value by considering three different “approaches” to
    value: cost, income, and sales comparison. OAR 150-308.205-
    (D)(3)(a); see also ORS 308.411(1) (requiring the use of cost,
    income, or sales comparison approaches). The cost approach
    relies on the cost of constructing a substitute property that
    provides the same utility as the subject property at its high-
    est and best use. The income approach relies on the profits
    that the property can generate at its highest and best use.
    And the sales comparison approach relies on sale prices of
    other properties that can serve the same highest and best
    use as the subject property. An appraiser must consider
    each approach even though the appraiser may determine,
    after consideration, that not all three approaches are appro-
    priate in a specific case. OAR 150-308.205-(D)(3)(a). An
    appraiser then reconciles the indications of value produced
    by the appropriate approaches and concludes the analysis
    with a final valuation opinion.
    2
    The definition of highest and best use refers to the “use of vacant land or
    improved property.” OAR 150-308.205-(D)(1)(c). There are differences in the
    analysis of the highest and best use of property as if vacant and the highest and
    best use of property as improved. See, e.g., Appraisal of Real Estate at 309-19 (out-
    lining steps for the highest and best use as if vacant and highest and best use as
    improved). The parties have not argued that those differences affect the highest
    and best use conclusions reached in this case.
    604	             Hewlett-Packard Co. v. Benton County Assessor
    Although the highest and best use analysis nec-
    essarily precedes the final valuation opinion, an appraiser
    often must apply the three approaches to value while devel-
    oping preliminary valuation estimates of the property’s
    alternative uses for the highest and best use analysis. After
    all, the final step in the highest and best use analysis is to
    identify the use that produces the “highest value.” OAR 150-
    308.205-(D)(1)(c). Doing so is consistent with Appraisal of
    Real Estate, which is cited as the source of the department’s
    definition of highest and best use. 
    Id.
     According to Appraisal
    of Real Estate,
    “Highest and best use analysis often incorporates
    techniques and data from the application of all three
    approaches to value. * * * In many appraisal assignments,
    the final tests of financial feasibility and maximum produc-
    tivity require information that is obtained from the appli-
    cation and development of the approaches. Therefore, even
    though the discussion of highest and best use traditionally
    precedes the approaches to value in narrative appraisal
    reports, the conclusion of highest and best use often can be
    finalized only after a preliminary analysis of alternative
    uses has been performed.”
    Appraisal of Real Estate at 319.
    At the hearing before the Tax Court, the parties
    disputed both the highest and best use of the property and
    the real market value of the property at that use. They pre-
    sented evidence from expert appraisers in support of their
    respective positions. On both issues, the Tax Court accepted
    the factual analysis and opinions offered by HP’s expert. See
    Hewlett-Packard Co. v. Benton County Assessor, 
    21 OTR 186
    ,
    188-97 (2013) (determining the highest and best use and the
    real market value).
    According to HP’s expert, the highest and best use
    of the property was to continue using it in the same manner
    that HP had been using it—a single-purpose, owner-occupied
    facility serving a variety of “manufacturing and research
    and development operations.” 
    Id. at 189
    .3 In reaching that
    3
    In his report, HP’s expert described the highest and best use as the “con-
    tinued use as a specially designed single purpose campus style owner occupied
    manufacturing facility.”
    Cite as 
    357 Or 598
     (2015)	605
    conclusion, HP’s expert determined that, given the market of
    potential buyers for that type of property, a potential owner
    could not cost-effectively make productive use of the non-
    core space. Instead, HP’s expert concluded that a potential
    owner would simply leave the non-core space vacant while
    making productive use of the core space. Based on that opin-
    ion, the Tax Court found that the highest and best use of the
    property was “use by a single manufacturer using the core
    space and leaving the [non-core] space empty.” 
    Id. at 192
    .
    The parties spent considerable time at the hearing
    addressing whether a potential owner could make produc-
    tive use of the non-core space. According to the Tax Court,
    the department’s expert offered her opinion that “the space
    not used by a hypothetical purchaser of the property—the
    so called ‘non-core’ space—would be absorbed by other users
    in the market, at very healthy lease rates and with few, if
    any, conversion costs to make the existing space attractive
    at such lease rates.” 
    Id. at 190-91
    . Under the department’s
    reasoning, the property’s highest and best use would have
    multiple uses, where a potential owner would use the core
    space for its own research and manufacturing and use the
    non-core space as marketable rental property generating
    rental income.4
    HP’s expert disagreed and concluded that the con-
    version to marketable rental space could not satisfy all of the
    criteria for the highest and best use—that the use be legally
    permissible, physically possible, financially feasible, and
    result in the highest value. See OAR 150-308.205-(D)(1)(c)
    (defining highest and best use). First, HP’s expert found
    that the property was not zoned to be used as rental prop-
    erty and questioned whether the department’s proposed con-
    version was legally permissible. Second, the expert deter-
    mined that the department’s proposed conversion was not
    financially feasible. He reached that conclusion by “look[ing]
    at the costs, over time, of converting the existing space into
    space suitable for leasing to others and then weigh[ing]
    that cost against reasonably expected returns over time.”
    Hewlett-Packard, 21 OTR at 189. Based on that analysis,
    4
    See Appraisal of Real Estate at 325 (“Highest and best use often include
    more than one use for a parcel of land or an improved property.”).
    606	         Hewlett-Packard Co. v. Benton County Assessor
    HP’s expert concluded that “the cost of conversion to mar-
    ketable space exceeded the benefits of such conversion.” Id.
    Specifically, HP’s expert asserted that converting the non-
    core space into income-generating rental property would
    result in a net loss of about $13 million. As a result, HP’s
    expert stated that such a conversion was not financially fea-
    sible. Id.
    The Tax Court adopted the opinions offered by HP’s
    expert on those issues. According to the Tax Court, “the
    record shows that there are not insignificant questions about
    the legal obstacles that would be presented by trying to lease
    out the excess space.” Id. at 191. Further, the Tax Court
    concluded that “[a]ll of the evidence regarding the actual
    demands of the market in Corvallis, the location of the prop-
    erty relative to major transportation facilities, the actual
    condition of the property and other factors” undermined the
    department’s position that a potential owner would convert
    the non-core space into marketable rental property. Id. The
    Tax Court found that the opinion offered by HP’s expert was
    “consistent with the unrebutted testimony of witnesses for
    taxpayer with knowledge of these improvements in partic-
    ular and the market for space in Corvallis in general.” Id.
    As a result, the Tax Court “accept[ed] the conclusion that
    the costs of maintaining the excess space and converting
    it to space that would be attractive to the market would
    exceed the value to be produced by the potential rental of
    that space.” Id. For those reasons, the Tax Court ultimately
    concluded that the highest and best use of the property
    was a continuation of its existing use as a single-purpose,
    owner-occupied research and manufacturing facility where
    a potential owner would use the core space for research and
    manufacturing and leave the non-core space vacant.
    After establishing the highest and best use of the
    property, the Tax Court considered the conflicting valu-
    ation opinions offered by the parties’ experts. HP’s expert
    considered all three approaches to value—cost, income,
    and sales comparison—but he concluded that the income
    approach was not appropriate. Under the sales comparison
    approach, HP’s expert considered the prices buyers recently
    paid for similar single-purpose, owner-occupied research
    and manufacturing properties, and concluded that HP’s
    Cite as 
    357 Or 598
     (2015)	607
    improvements were worth $63 million on all three assess-
    ment dates.
    Under the cost approach, HP’s expert found the
    cost to build a new and cost-effective single-purpose, owner-
    occupied research and manufacturing property that pro-
    vides the same utility as HP’s property. He then adjusted
    that cost to reflect the property’s depreciation. One type of
    depreciation is based on the negative value created by com-
    ponents of the subject property that fail to cost-effectively
    serve the property’s highest and best use. The value of the
    loss, which is the target of the department’s appeal, is part
    of that depreciation analysis and will be discussed further
    below. Under the cost approach, HP’s expert concluded that
    the improvements were worth $65 million in 2008, $68 mil-
    lion in 2009, and $64 million in 2010.
    HP’s expert then reconciled the results from the
    cost approach and the sales comparison approach. His rec-
    onciliation produced a final valuation of the improvements
    that matched his results from the cost approach. As a result,
    HP’s expert offered his final opinion that the real mar-
    ket value of HP’s improvements was $65 million in 2008,
    $68 million in 2009, and $64 million in 2010.
    The department’s expert reached final opinions
    of the real market value that were substantially higher:
    $210 million for 2008, $217 million for 2009, and $179 mil-
    lion for 2010. However, the department’s expert reached
    those final valuation opinions by valuing the improvements
    according to a highest and best use that the Tax Court ulti-
    mately rejected—namely, that the property would be used
    entirely or partially to generate rental income. Additionally,
    the department, both through its expert and in its post-
    trial briefing, attempted to rebut the methodology that HP’s
    expert used.
    Because the real market value is based on the high-
    est and best use of the property, the Tax Court rejected the
    valuation opinions of the department’s expert and accepted
    the testimony of HP’s expert on the value of the property
    at its highest and best use. 
    Id. at 196
     (“[T]he real market
    values for the subject property as found by the appraiser
    for taxpayer are accepted by the court as the real market
    608	              Hewlett-Packard Co. v. Benton County Assessor
    values for the subject properties as of the respective assess-
    ment dates.”). As a result, the Tax Court found that, for the
    purposes of assessing property taxes, the real market value
    of HP’s improvements was $65 million in 2008, $68 million
    in 2009, and $64 million in 2010.
    The department appeals the Tax Court’s decision on
    the real market value. We review final decisions and orders
    of the Tax Court for “errors or questions of law or lack of sub-
    stantial evidence in the record to support the tax court’s deci-
    sion or order.” ORS 305.445. The department does not argue
    that the Tax Court erred when it adopted the factual con-
    clusions or the highest and best use analysis of HP’s expert.
    Instead, the department contends that, even if the Tax Court
    correctly decided the facts and the highest and best use of the
    property, the Tax Court nevertheless erred when it adopted
    the final valuation opinion offered by HP’s expert.
    According to the department, HP’s expert deter-
    mined the real market value using a methodology that
    failed to comply with the department’s administrative rules.
    Specifically, the department contends that HP’s expert, and
    therefore the Tax Court, misapplied the department’s rule
    defining value of the loss, which is a step in the process for
    calculating depreciation under the cost approach. See OAR
    150-308.205-(F)(3)(k) (defining value of the loss).5 Value of
    the loss is generally the excess operating costs that an owner
    will incur as the result of inefficiencies in the property that
    prevent the property from cost-effectively serving its high-
    est and best use. 
    Id.
     The department argues that, as a mat-
    ter of law, HP’s expert misapplied the department’s rule on
    the value of the loss and, therefore, that the Tax Court erred
    5
    The department’s definition of value of the loss includes technical terms
    that will be explained further below. That definition states,
    “The value of the loss equals the present value of the after-tax loss in
    anticipated income from the continuing operation of the property with a defi-
    ciency or superadequacy compared to the projected operation of the replace-
    ment property. For industrial plants, this loss in income is often the result of
    excess operating costs due to inefficiencies in the subject plant compared to
    the subject property when cured of the functional obsolescence. The present
    value includes factors for the time period that the plant will continue to incur
    the loss in income and an appropriate discount rate. See OAR 150-308.205-
    (C) for the appropriate method of calculating the discount rate.”
    OAR 150-308.205-(F)(3)(k).
    Cite as 
    357 Or 598
     (2015)	609
    as a matter of law by adopting the misapplication of the rule
    by HP’s expert.
    As an initial matter, HP argues that a Tax Court
    determination of the real market value of property is a fact
    issue and not a legal issue. In support, HP cites Reynolds
    Metals Co. v. Dept. of Rev., 
    299 Or 592
    , 705 P2d 712 (1985),
    on recons, 
    300 Or 250
    , 709 P2d 710 (1985), in which we iden-
    tified the fact issues in that case as including the dollar value
    of a property’s depreciation. Id. at 594 (“The major issues of
    fact are the dollar value of physical depreciation and the dol-
    lar value of functional obsolescence in the plant.”).
    HP, however, misreads Reynolds Metals. Although
    the valuation issues in Reynolds Metals were fact issues,
    nothing in that decision states that valuation issues are
    always and entirely fact issues. To be sure, the valuation
    process—including the highest and best use analysis and
    the approaches to value—is fact intensive. The process fre-
    quently requires an appraiser to collect data on the phys-
    ical property, the real estate market, and larger economic
    trends. And an appraiser may exercise professional judg-
    ment while both collecting that data and weighing its rel-
    evance. Further, the final opinion of value offered by an
    expert appraiser is just that—an expert opinion. To decide
    a property’s real market value, the Tax Court often resolves
    fact issues relating to the competing testimony of appraisal
    experts, including the credibility and persuasiveness of
    those experts.
    Despite the fact-intensive nature of the valua-
    tion process, the relevant statutes and department rules
    may impose legal constraints on that process. And inter-
    pretations of those statutes and rules remain legal issues.
    See Hopkins v. SAIF, 
    349 Or 348
    , 355, 245 P3d 90 (2010)
    (“Whether one expert is more persuasive than another in
    a particular case can be important in resolving a factual
    question; it cannot, however, determine the legal meaning
    of a statutory term.”). The statutes and rules governing the
    valuation process leave room for opposing appraisal experts
    to comply with the governing statutes and rules while still
    reaching different results. Nevertheless, determining the
    meaning and scope of the statutes and rules is a question of
    610	          Hewlett-Packard Co. v. Benton County Assessor
    law. Whether an appeal challenging a valuation judgment
    raises a factual issue or a legal issue depends on the ques-
    tion presented.
    The question that the department presents here
    relates to the interpretation of the department’s rule defin-
    ing the value of the loss, OAR 150-308.205-(F)(3)(k). That is
    a legal issue. The department stated repeatedly in its brief-
    ing and at oral argument that it was not asking this court
    to reconsider the Tax Court’s factual findings. As a result,
    we consider only the narrow legal issue that the department
    raises: whether the rule defining value of the loss required
    the Tax Court to calculate the value of the loss differently
    than it did.
    Because the department is the source of the rule
    defining value of the loss, OAR 150-308.205-(F)(3)(k), the
    department’s interpretation of that rule is entitled to def-
    erence “as long as its interpretation is a plausible one and
    not inconsistent with the rule, its context, or any other
    source of law.” Powerex Corp. v. Dept. of Rev., 
    357 Or 40
    ,
    54, 346 P3d 476 (2015) (quotation omitted). Context plays
    an important role in this case, both because the rule at
    issue refers to technical terms used in other rules and
    because the rule itself is part of a larger scheme of rules
    governing the valuation process. We therefore consider
    that context before assessing the rule defining value of
    the loss and the plausibility of the department’s interpre-
    tation of that rule.
    As noted above, the value of the loss is a compo-
    nent of the depreciation analysis within the cost approach
    to value. “The cost approach to value is based upon the
    principle of substitution, that is, it assumes that property
    is worth its cost or the cost of a satisfactory substitute with
    equal utility.” Delta Air Lines, Inc. v. Dept. of Rev., 
    328 Or 596
    , 605, 984 P2d 836 (1999). At its most basic level, the
    cost approach requires an appraiser to calculate the cost to
    construct a substitute property and then deduct value from
    that cost to account for the subject property’s depreciation—
    namely, attributes of the subject property that detract from
    its market value.
    Cite as 
    357 Or 598
     (2015)	611
    In this case, HP’s expert used the replacement cost
    approach, which starts by calculating the cost to build “a
    property having equivalent utility to the subject property
    but built with the most cost-effective materials, design,
    and layout.” OAR 150-308.205-(F)(3)(b); see also Hewlett-
    Packard, 21 OTR at 195 (stating that the parties both
    applied the replacement cost approach).6 The department’s
    rules define “[t]he most cost-effective materials, design, and
    layout” as the “combination of investment (cash out-flows)
    and the present value of anticipated after tax net income
    (cash in-flows) that produces the highest net present value.”
    OAR 150-308.205-(F)(3)(b).
    Because the replacement cost approach focuses on
    the cost of constructing improvements with “equivalent util-
    ity to the subject property,” HP’s appraiser first found the
    utility of the subject property. He determined that only the
    core space provided utility to a potential owner of the prop-
    erty. He then divided up the square footage in the core space
    according to the functions that the space could support, such
    as office, manufacturing, and warehouse. He then multiplied
    the square footage for each category by the cost per square
    foot to construct new, cost-effective buildings that serve
    those same functions: new office space, new manufacturing
    space, and new warehouse space. The result was the cost of
    constructing a new 1.2 million square foot facility that could
    support manufacturing and research and development oper-
    ations. For the 2008 assessment, HP’s expert estimated that
    the cost of constructing a new, cost-effective version of the
    core space would be $192 million.7
    HP’s expert then deducted value from that replace-
    ment cost to account for the subject property’s depreciation.
    The department’s rules identify three types of deprecia-
    tion: physical depreciation (age and deterioration), external
    6
    The replacement cost approach is in contrast to the reproduction cost
    approach, which starts by calculating the cost to build “a new replica of the sub-
    ject property * * * using the same materials, design, layout, [and] quality of work-
    manship.” OAR 150-308.205-(F)(3)(a)(A).
    7
    Throughout the remainder of the opinion, we use the values for the 2008
    assessment to illustrate the facts and concepts relevant to the department’s chal-
    lenge. Although the values are slightly different for the 2009 and 2010 assess-
    ments, the analysis is the same.
    612	          Hewlett-Packard Co. v. Benton County Assessor
    obsolescence (economic and locational factors), and func-
    tional obsolescence (construction and design inefficiencies).
    See, e.g., OAR 150-308.205-(F)(2)(b) (referring to physical
    depreciation, functional obsolescence, and external obsoles-
    cence). HP’s expert found no external obsolescence to deduct
    from the $192 million replacement cost, but he deducted
    $89 million for the physical depreciation of the core space and
    $38 million for its functional obsolescence. Based on those
    values, HP’s expert concluded that, for the 2008 assessment,
    the cost approach indicated that the subject property was
    worth about $65 million.
    The department does not challenge the values HP’s
    expert used for the replacement cost, the physical depreci-
    ation, or the external obsolescence. Instead, of all the steps
    in the process HP’s expert used in the cost approach, the
    department challenges only the value HP’s expert used for
    the property’s functional obsolescence. The department’s
    rules for finding a property’s functional obsolescence include
    the calculation for the value of the loss.
    The department’s rules define functional obsoles-
    cence as
    “a loss in market value of a subject property when there is
    a reasonable feasibility of a typical prospective purchaser
    acquiring, without undue delay, a replacement property
    possessing an equivalent utility but is more cost-effective
    in terms of design, materials, or equipment.”
    OAR 150-308.205-(F)(3)(c). An appraiser identifies func-
    tionally obsolete components of the subject property by com-
    paring the subject property to the replacement property,
    which represents the improvements that would most cost-
    effectively achieve the same utility as the subject property.
    Id. (“Functional obsolescence exists only by a comparison
    between the subject and the replacement property.”).
    A functionally obsolete component can be either
    deficient or superadequate. A property has a deficiency if it is
    missing a component needed to operate more cost-effectively
    or if it has a substandard version of that component. See
    OAR 150-308.205-(F)(3)(c)(A) - (B) (describing deficiencies).
    And a property has a superadequacy if it has a component
    exceeding market norms or the requirements needed to
    Cite as 
    357 Or 598
     (2015)	613
    operate cost-effectively. See OAR 150-308.205-(F)(3)(c)(C)
    (describing superadequacies). Specifically, a superadequacy
    is “an asset present in the subject property that is not pres-
    ent in the replacement property and does not contribute to
    value an amount equal to its cost.” 
    Id.
    In this case, HP’s expert determined that HP’s
    property had a superadequacy—namely, the non-core space.
    According to the analysis by HP’s expert, which the Tax
    Court adopted, only 1.2 million square feet of the property
    provided utility to a potential owner. But the subject prop-
    erty was 2 million square feet. As a result, the subject prop-
    erty had 800,000 square feet of superadequate space, which
    corresponded to the non-core space. The department does
    not challenge that determination.
    The indication of value that results from the cost
    approach must account for the presence of functionally obso-
    lete components, such as the superadequate space on the
    subject property. To do so, an appraiser determines the mar-
    ket loss resulting from the presence of functionally obsolete
    components and then deducts that amount from the repro-
    duction or replacement cost. Because HP’s expert started
    with the replacement cost, the department’s rules required
    a deduction using one of two potential methods for calculat-
    ing the market loss: “the cost to cure or the value of the loss.”
    OAR 150-308.205-(F)(2).
    The cost to cure is the cost needed to alter the sub-
    ject property so that it can operate as cost-effectively as
    the replacement property. See OAR 150-308.205-(F)(3)(h)
    (defining cost to cure as “the net cash out-flow anticipated to
    be necessary to eliminate the deficiency or superadequacy”).
    In this case, the cost to cure would be the cost to eliminate
    the non-core space and allow the property to operate in the
    same manner as the replacement property, consisting solely
    of the core space.
    The value of the loss, as previously noted, is gen-
    erally the additional operating costs that will result from
    failing to alter the subject property to match the cost-
    effectiveness of the replacement property. OAR 150-308.205-
    (F)(3)(k). The department’s rules define the value of the
    loss as “the present value of the after-tax loss in anticipated
    614	              Hewlett-Packard Co. v. Benton County Assessor
    income from the continuing operation of the property with
    a deficiency or superadequacy compared to the projected
    operation of the replacement property.” 
    Id.
     That rule states
    that, “[f]or industrial plants, this loss in income is often the
    result of excess operating costs due to inefficiencies in the
    subject plant compared to the subject property when cured
    of the functional obsolescence.” 
    Id.
    Between those two methods—the cost to cure and
    the value of the loss—an appraiser uses whichever method
    results in the smaller deduction. OAR 150-308.205-(F)(2).
    If the cost to cure is less, then the functional obsolescence is
    “curable.” OAR 150-308.205-(F)(3)(g). If the value of the loss
    is less, then the functional obsolescence is “incurable.” OAR
    150-308.205-(F)(3)(f).
    The department concedes that in this case the
    value of the loss is less than the cost to cure, even if we
    affirm the analysis that the Tax Court adopted.8 Therefore,
    the non-core space is an incurable superadequacy. The mar-
    ket loss resulting from the presence of the non-core space
    is determined according to the value of the loss, and the
    value of the loss is deducted from the cost of the replace-
    ment property.
    HP’s expert determined the value of the loss, and
    thus the functional obsolescence, by comparing the antici-
    pated income from operating the 2 million square foot sub-
    ject property to the anticipated income from operating the
    1.2 million square foot replacement property. According to
    HP’s expert, an owner of the subject property would annu-
    ally incur $4.6 million in additional operating expenses,
    as compared to the replacement property, until the prop-
    erty is redeveloped. After factoring in taxes and by apply-
    ing a discount rate to the additional operating expenses
    incurred over the remaining economic life of the non-core
    space, HP’s expert determined the value of the loss to be
    $38 million.
    8
    The department assigned as error the manner in which HP’s expert had
    calculated the cost to cure as well as the value of the loss. At oral argument, how-
    ever, the department waived any challenge related to the cost to cure and stated
    that it was challenging only the value of the loss. As a result, we do not consider
    whether HP’s expert properly calculated the cost to cure.
    Cite as 
    357 Or 598
     (2015)	615
    The department does not challenge the manner in
    which HP’s expert calculated the taxes, the discount rate, or
    the remaining economic life of the non-core space. Instead,
    the department contends only that HP’s expert erred when
    he calculated the “loss in anticipated income from continu-
    ing operation of the [subject] property with a deficiency or
    superadequacy.” OAR 150-308.205-(F)(3)(k). According
    to the department, the value of the loss should have been
    $13 million instead of the $38 million used by HP’s expert.
    The department reaches that number by relying on the
    highest and best use analysis performed by HP’s expert. As
    part of that analysis and as described above, HP’s expert
    considered whether converting the non-core space was
    a financially feasible use. He concluded that conversion
    was not financially feasible because an owner would lose
    $13 million by converting and maintaining the non-core
    space. The department contends that a potential owner
    would rather lose $13 million by converting the non-core
    space than lose $38 million by leaving the non-core space
    vacant. Recalculating the value of the loss as $13 million
    instead of $38 million would increase the cost approach val-
    uation by $25 million, resulting in a $90 million indication
    of value rather than the $65 million reached by HP’s expert
    and the Tax Court.
    The difficulty with the department’s analysis is fit-
    ting it within the narrow legal argument that it makes—
    namely, that the Tax Court misinterpreted or misapplied the
    rule defining the value of the loss. The department’s under-
    standing of the value of the loss is inconsistent with the val-
    uation scheme otherwise set out in the department’s rules.
    The value of the loss is used to measure the functional obso-
    lescence of the subject property. OAR 150-308.205-(F)(2).
    And functional obsolescence is the negative value of any
    deficiency or superadequacy in the subject property as
    compared to the replacement property. OAR 150-308.205-
    (F)(3)(c). The replacement property provides the same util-
    ity as the subject property but uses the most cost-effective
    materials, design, and layout. OAR 150-308.205-(F)(2). As
    a result, for the purposes of determining functional obso-
    lescence, the only difference between the subject property
    and the replacement property is the materials, design, and
    layout of the two properties.
    616	          Hewlett-Packard Co. v. Benton County Assessor
    But the department’s interpretation distorts the
    comparison between the subject property and the replace-
    ment property. The department would allow an appraiser to
    consider changes to the utility of the subject property as part
    of his or her value of the loss calculation. In this case, under
    the department’s interpretation, the subject property would
    provide 2 million square feet of utility that includes market-
    able rental space as well as an owner-occupied research and
    manufacturing facility. The replacement property, on the
    other hand, would provide only 1.2 million square feet used
    as an owner-occupied research and manufacturing facility.
    The department contends that a potential owner would use
    all 2 million square feet because that would generate the
    most value.
    But it is not appropriate to measure functional obso-
    lescence by comparing the value of a 2 million square foot
    property that includes marketable rental space as well as an
    owner-occupied research and manufacturing facility to the
    value of a 1.2 million square foot property used only as an
    owner-occupied research and manufacturing facility. That
    comparison occurs at the stage of determining the high-
    est and best use. By the time an appraiser calculates the
    value of the loss as part of the final valuation opinion, the
    appraiser has already figured out the use that a potential
    owner would make of the property to produce the highest
    value or maximum productivity: that use is the property’s
    highest and best use. See OAR 150-308.205-(D)(1)(c) (defin-
    ing highest and best use as, among other things, the use
    that “results in the highest value”).
    Here, the Tax Court found that the highest and best
    use of the property was as a single-purpose, owner-occupied
    manufacturing and research facility. HP’s expert found that
    the non-core space provided no utility as part of a single-
    purpose, owner-occupied manufacturing and research
    facility. The Tax Court expressly adopted that finding and
    valued the property as though it provided only 1.2 million
    square feet of utility. As a result, the non-core space was not
    included in the replacement property. And the value of the
    loss was calculated as the increased operating expenses that
    an owner would incur as a result of operating the subject
    property as compared to the replacement property. That is
    Cite as 
    357 Or 598
     (2015)	617
    entirely consistent with the department’s rule, which states
    that the value of the loss “is often the result of excess operat-
    ing costs due to inefficiencies in the subject plant compared
    to the subject property when cured of the functional obsoles-
    cence.” OAR 150-308.205-(F)(3)(k).
    HP’s expert calculated those additional operating
    expenses as $4.6 million per year, which, when spread out
    over the remaining economic life of the improvements, leads
    to a present value of $38 million. The department calcu-
    lates the operating expenses differently only because the
    department contends that the property should be operated
    to serve a different use. If the department were correct, and
    converting the non-core space into marketable rental prop-
    erty would increase the value of the property by $25 million,
    then the highest and best use of the property would be the
    mixed-use manufacturing/rental property that the depart-
    ment urged the Tax Court to accept. In that case, using the
    non-core space as marketable rental property would contrib-
    ute $25 million in incremental value to the subject prop-
    erty over leaving the non-core space vacant, even if the non-
    core space continued generating operating losses after the
    conversion. In other words, if using the property solely as
    a research and manufacturing facility makes the property
    worth $65 million and using the property as a rental prop-
    erty as well as a research and manufacturing facility makes
    the property worth $90 million, then using the property as
    a rental property contributes $25 million in value.9
    To the extent the department accurately represents
    the conversion costs and projected rental income used by
    HP’s expert and the Tax Court, then the department would
    have identified a potential error in the highest and best use
    9
    That is not to suggest that, even if the highest and best use was the mixed-
    use manufacturing/rental property that the department urged, the final valu-
    ation would increase by $25 million. Changing the highest and best use would
    require changing numerous other components of the cost approach, including
    the utility provided by the property, the scope of the replacement property, the
    calculation for physical depreciation, and the existence of external obsolescence.
    Further, changing the highest and best use would also require changes to the
    sales comparison approach as well as the reconciliation leading to the final val-
    uation opinion. The wide-ranging effects of the department’s argument on the
    valuation process highlight the impropriety of attempting to contain this issue
    entirely within the value of the loss.
    618	          Hewlett-Packard Co. v. Benton County Assessor
    analysis—specifically, calling into question the analysis of
    financial feasibility and the use that creates the highest
    value.. But the department has not asked us to consider the
    proper interpretation of those criteria or the Tax Court’s
    findings on those issues. Nor has the department asked us
    to review the Tax Court’s conclusion that there were signifi-
    cant questions regarding the legal permissibility of convert-
    ing the non-core space into marketable rental space. Those
    questions create market risk and decrease the present value
    of the proposed use.
    It is unclear whether the financial feasibility analy-
    sis performed by HP’s expert is the correct test for the finan-
    cial feasibility of improved property. If converting the non-
    core space is not financially feasible because it leads to a
    loss of $13 million, then it is not immediately apparent how
    leaving the non-core space vacant could be financially fea-
    sible, given the conclusion of HP’s expert that leaving the
    non-core space vacant creates a loss of $38 million. Even the
    Tax Court stated that HP’s expert’s analysis of the highest
    and best use was “perhaps not free from criticism.” Hewlett-
    Packard, 21 OTR at 191.
    Nevertheless, by concluding that the highest and
    best use of the property was as a single-purpose, owner-
    occupied manufacturing and research facility, the Tax Court
    held that a single-purpose, owner-occupied manufacturing
    and research facility was the physically possible, legally
    permissible, and financially feasible use that resulted in
    the highest value. The department does not challenge the
    factual or legal basis for ruling. Instead, the department
    maintains that we can rule in its favor without reversing
    the Tax Court’s ruling on highest and best use. But without
    disturbing that ruling, we cannot accept the department’s
    argument that a potential owner of the property would use
    it as a mixed-use manufacturing/rental property. Therefore,
    on the record before us, the Tax Court properly calculated
    the value of the loss.
    The judgment of the Tax Court is affirmed.