Expert Witness Appraiser: Real Property Valuation Testimony in California

What actually qualifies an appraiser to testify

Under California Evidence Code § 720, a witness may testify as an expert only if they have special knowledge, skill, experience, training, or education sufficient to qualify on the subject. For property value specifically, Evidence Code § 813(a) narrows the field further: the value of property may be shown only by the opinion of a witness qualified to express such an opinion, the owner or the owner's spouse, or an officer, regular employee, or partner designated by a corporation, partnership, or unincorporated association that owns the property, if that designee is knowledgeable as to the value. Section 813(c) defines the owner broadly: it includes a person entitled to possession of the property, and either side of an ownership dispute where the court decides it is not efficient to resolve title first. The 'partner' branch matters more than people expect; it is the route by which a partnership-dissolution valuation fight gets an owner-side number on the record.

Licensing is state-specific. There is no national appraisal license. My Certified General credential is issued by the California Bureau of Real Estate Appraisers under the Real Estate Appraisers' Licensing and Certification Law (Bus. & Prof. Code § 11300 et seq.), and it is listed on the ASC National Registry maintained under Title XI of FIRREA (12 U.S.C. § 3331 et seq.). The Registry is a national list of state-issued credentials, not a credential of its own. The Certified General classification is the broadest California issues; it is not restricted by property type, transaction value, or complexity.

Qualification is not the end of it. Under Sargon Enterprises, Inc. v. University of Southern California (2012) 55 Cal.4th 747, the trial court acts as gatekeeper under Evidence Code §§ 801(b) and 802 and may exclude an opinion that rests on matter of a type not reasonably relied upon, or on reasoning that does not actually support the conclusion. A credentialed appraiser with an unsupported analysis still gets excluded.

California has its own evidence code for property value, and its own carve-outs

Evidence Code §§ 810 through 824 are special rules of evidence for valuation. Read § 810 in full before relying on them. Subdivision (a) applies the article to any action in which the value of property is to be ascertained, but only 'except where another rule is provided by statute.' Subdivision (b) then removes an entire arena: 'This article does not govern ad valorem property tax assessment or equalization proceedings.' Assessment appeals run on their own track before the county assessment appeals board under separate rules. Do not scope a tax appeal off this article.

Within its scope, the article controls what an appraiser may rely on. Section 814 limits the opinion to matter perceived by or personally known to the witness, or made known at or before the hearing, of a type reasonably relied upon in determining property value. Section 815 permits reliance on a sale or contract to sell and purchase the subject property itself, made freely and in good faith and sufficiently near in time. Section 816 permits comparable sales sufficiently near in time, located near enough, and similar in character, size, situation, usability, and improvements. Section 817 addresses leases, with a percentage-rent lease usable only to arrive at an opinion of the reasonable net rental value attributable to the property as provided in § 819, or to determine the value of a leasehold interest. Section 819 addresses the capitalized value of reasonable net rental value, § 820 the value of the land plus the cost of replacing or reproducing the improvements less depreciation and obsolescence. Section 823 allows any method of valuation that is just and equitable where there is no relevant, comparable market. Section 824 then carves out nonprofit, special use property as defined by Code of Civil Procedure § 1235.155: where there is no relevant, comparable market for it, a just and equitable method is the cost of purchasing land, the reasonable cost of making it suitable for the conduct of the same nonprofit special use, and the cost of constructing similar improvements, and the valuation witness must base the opinion on the value of reproducing the improvements without taking any depreciation or obsolescence into consideration. Subdivision (c) exempts specified public entity and public utility acquisitions for water, sewer, electricity, telephone, natural gas, or flood control facilities or rights-of-way that neither require removal or destruction of existing improvements nor render the property unfit for the owner's present or proposed use.

Section 822 is the one that surprises people, and its force depends on the proceeding. Section 822(a) makes certain matter inadmissible, and unusable as a basis for an opinion of value, in an eminent domain or inverse condemnation proceeding: the price or terms of an acquisition for a public use that could have been taken by eminent domain; the price of an offer, option, or listing to buy or lease (except where offered as an admission of a party); the value assessed for property tax purposes or the amount of taxes due, though actual or estimated taxes may still be considered in determining reasonable net rental value; an opinion as to the value of any property other than that being valued; the influence on value of noncompensable items of value, damage, or injury; and the capitalized value of the income or rental from any property or property interest other than the one being valued.

Read that last item precisely. Section 822(a)(6) excludes capitalized income from OTHER property; it is not a bar on capitalizing the subject property's own income stream, which §§ 817 and 819 expressly contemplate. And § 822(b) is a materially weaker rule than § 822(a): in any action that is not eminent domain or inverse condemnation, the same matter is inadmissible only 'except to the extent permitted under the rules of law otherwise applicable.' That is a conditional bar, not a flat exclusion. The practical consequence holds either way: an approach that is perfectly defensible in a lender appraisal can draw a motion in limine in a California valuation trial, so the analysis is better built to §§ 814 through 823 from the outset than retrofitted after the motion is filed.

A related point that § 822 does not decide: income from a business operated on the property. In eminent domain, loss of business goodwill is a separate compensable item under Code of Civil Procedure § 1263.510, with its own statutory elements the owner must prove; it is not folded into the real property value opinion.

Federal court is a different test, and a different disclosure regime

In federal court the standard is Federal Rule of Evidence 702, amended effective December 1, 2023 to make explicit that the proponent must demonstrate to the court that it is more likely than not that the admissibility requirements are met, and that the expert's opinion must reflect a reliable application of the principles and methods to the facts of the case. That amendment was a deliberate correction of courts treating reliability as a question of weight for the jury. Daubert v. Merrell Dow Pharmaceuticals, 509 U.S. 579 (1993) and Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999) supply the framework, with Kumho confirming it reaches non-scientific technical and specialized expertise, which is where appraisal sits. FRE 703 and 705 govern the basis of the opinion and its disclosure. The Federal Rules of Evidence also apply in bankruptcy cases under Fed. R. Bankr. P. 9017.

The disclosure difference drives scheduling. Federal Rule of Civil Procedure 26(a)(2)(B) requires a retained expert to provide a signed written report containing a complete statement of all opinions and the basis and reasons for them, the facts or data considered, supporting exhibits, qualifications including publications authored in the previous 10 years, a list of all other cases in which the witness testified as an expert at trial or by deposition in the previous four years, and a statement of compensation.

California requires none of that automatically, and the mechanism is commonly misdescribed. Expert disclosure in California state court is demand-driven. Under CCP § 2034.210, after the initial trial date is set any party may demand a mutual and simultaneous exchange of expert witness information; if nobody serves that demand, no exchange obligation arises. The designation itself, and the expert witness declaration for retained experts, happen in the exchange under § 2034.260. A demand for the mutual and simultaneous production of expert reports and writings is made as part of that same exchange demand under § 2034.210(c). Section 2034.270 then requires the parties to produce all discoverable reports and writings, if any, made by the designated expert. It compels production of what exists, and does not require an expert to author a report that would not otherwise be written.

Eminent domain runs on a separate track. Under CCP § 1258.210, not later than the 10th day after the trial date is selected, a party may serve a demand to exchange lists of expert witnesses and statements of valuation data, and the statutory notice language warns that failing to comply waives the right to call unlisted experts in the case in chief and to introduce valuation matter not properly disclosed.

Deposition, the workfile, and cross-examination

Experts on an exchanged list are subject to deposition under CCP § 2034.410. Under § 2034.430(b), the party noticing the deposition of a retained expert pays that expert's reasonable and customary hourly or daily fee for time spent at the deposition, running from the time noticed in the deposition subpoena, or from the expert's arrival if that is later, until the expert is dismissed, and regardless of whether the expert is actually deposed by any party attending. Subdivisions (c) and (d) shift the fee for a delay to tardy counsel representing the expert or a nonnoticing party, capped at the fee charged to the party who retained the expert.

USPAP's RECORD KEEPING RULE requires a workfile to exist before the report is issued, and to be retained for at least five years after preparation or at least two years after final disposition of any judicial proceeding in which the appraiser gave testimony related to the assignment, whichever period expires last. In litigation the workfile is not an archive. It is effectively the exhibit list for cross-examination: the adjustments, the comparables considered and rejected, the data sources behind each one. Opposing counsel is entitled to test all of it, so it should be assembled as though it will be read aloud.

Independence, rebuttal, and appraisal review

USPAP's ETHICS RULE requires impartiality, objectivity, and independence, and prohibits accepting an assignment, or having a compensation arrangement for one, that is contingent on the reporting of a predetermined result, a direction in assignment results that favors the cause of the client, the amount of a value opinion, the attainment of a stipulated result, or the occurrence of a subsequent event directly related to the appraiser's opinions and specific to the assignment's purpose. In California that is not merely a professional norm: Business and Professions Code § 11319 makes USPAP the minimum standard of conduct and performance for a licensee, and a departure is grounds for BREA discipline. Contingent valuation work is therefore off the table for any California licensee. It is also bad tactics: an expert shown to have a financial stake in the number has already lost the cross-examination.

Rebutting an opposing appraisal is a distinct assignment. Development and reporting of an appraisal review are governed by USPAP Standards 3 and 4. A review states whether the work under review is credible for its intended use and identifies specifically where the analysis fails. It does not produce the reviewer's own opinion of value unless the assignment expressly includes developing one, a distinction that gets blurred in briefing and then punished on the stand.

Scope of engagement

I hold the MAI and SRA designations and founded KO Appraisal in 2023. Before that I was a Senior Real Estate Appraiser at JP Morgan Chase and an independent fee appraiser at MVT Appraisal.

Property types I have valued include neighborhood and community shopping centers, apartment complexes, single- and multi-tenanted industrial buildings, low- to high-rise office buildings, mixed-use facilities, and vacant land. Prior assignments have included condemnation, estates, financing, and due diligence support, for clients including accountants, investment firms, law firms, lenders, and private and public agencies. I offer deposition and expert witness testimony.

Standard turnaround is one to three weeks. Engagements are California real property only: appraiser credentials are issued state by state and there is no national license.

Commercial: (619) 704-7070, kocommercialappraisal@gmail.com. Residential: (760) 685-8036, kevin@koappraisal.com. Office: 600 W Broadway, San Diego, CA 92101.

This page describes the rules that govern my work as an appraiser. It is general information, not legal advice. Retained counsel should confirm designation deadlines, exchange demands, and disclosure obligations for your forum and case type.

Common questions

Sources

Every statutory and regulatory claim on this page traces to one of the following. Where a source could not be confirmed, the claim was removed rather than softened.

1. Cal. Evid. Code § 720: a person may testify as an expert only if qualified by special knowledge, skill, experience, training, or education on the subject.
2. Cal. Evid. Code § 813: value of property may be shown only by opinions of (a)(1) qualified witnesses, (a)(2) the owner or owner's spouse, or (a)(3) an officer, regular employee, or partner designated by a corporate, partnership, or unincorporated-association owner who is knowledgeable as to value; (c) defines 'owner' to include a person entitled to possession.
3. Cal. Evid. Code §§ 801(b), 802: an expert opinion must rest on matter of a type reasonably relied upon by experts on the subject, and the court may require the witness to state the reasons and the matter relied on.
4. Sargon Enterprises, Inc. v. University of Southern California (2012) 55 Cal.4th 747: the trial court is a gatekeeper and may exclude expert opinion based on speculative matter or on reasoning that does not support the conclusion.
5. Cal. Evid. Code § 810: (a) except where another rule is provided by statute, this article supplies special rules of evidence for any action in which the value of property is to be ascertained; (b) the article does not govern ad valorem property tax assessment or equalization proceedings.
6. Cal. Evid. Code § 814: the opinion must be based on matter perceived by or personally known to the witness, or made known at or before the hearing, of a type reasonably relied upon in determining property value.
7. Cal. Evid. Code § 815: permits consideration of the price, terms, and circumstances of a sale or contract to sell and purchase the subject property, if freely made in good faith and sufficiently near in time.
8. Cal. Evid. Code § 816: permits consideration of comparable sales made in good faith, sufficiently near in time, located near enough, and similar in character, size, situation, usability, and improvements.
9. Cal. Evid. Code § 817: (a) permits consideration of the rent reserved and other terms and circumstances of leases of the property being valued; (b) a lease providing for a rental fixed by a percentage or other measurable portion of gross sales or gross income from a business conducted on the leased property may be taken into account only for the purpose of arriving at an opinion as to the reasonable net rental value attributable to the property or property interest being valued as provided in Section 819, or determining the value of a leasehold interest.
10. Cal. Evid. Code § 819: permits consideration of the capitalized value of the reasonable net rental value attributable to the land and existing improvements.
11. Cal. Evid. Code § 820: permits consideration of the value of the land together with the cost of replacing or reproducing the existing improvements, less depreciation and obsolescence.
12. Cal. Evid. Code § 822: (a) in eminent domain and inverse condemnation proceedings, listed matter is inadmissible and may not be a basis for a value opinion, including acquisitions for public use, offers/options/listings, assessed value or taxes due, opinions of the value of other property, noncompensable items of value or damage, and (a)(6) the capitalized value of income or rental from property other than that being valued; (b) in other actions the same matter is inadmissible except to the extent permitted under otherwise applicable rules of law.
13. Cal. Evid. Code § 823: where there is no relevant, comparable market, value may be determined by any method of valuation that is just and equitable.
14. Cal. Evid. Code § 824: (a) for nonprofit, special use property as defined by Code Civ. Proc. § 1235.155 for which there is no relevant, comparable market, a just and equitable method of determining value is the cost of purchasing land, the reasonable cost of making it suitable for the conduct of the same nonprofit special use, together with the cost of constructing similar improvements; (b) a witness giving opinion testimony on such property must base the opinion on the value of reproducing the improvements without taking into consideration any depreciation or obsolescence; (c) the section does not apply to specified public entity or public utility acquisitions for water, sewer, electricity, telephone, natural gas, or flood control facilities or rights-of-way that neither require removal or destruction of existing improvements nor render the property unfit for the owner's present or proposed use.
15. Cal. Code Civ. Proc. § 1263.510: in eminent domain, loss of business goodwill is separately compensable on proof of the statutory elements.
16. Cal. Code Civ. Proc. § 2034.210: after the initial trial date is set, any party may demand a mutual and simultaneous exchange of expert witness lists; (b) retained experts require an expert witness declaration; (c) the demand may also seek mutual production of the experts' discoverable reports and writings.
17. Cal. Code Civ. Proc. § 2034.260: the parties exchange expert witness information in writing on the specified date, including the expert witness declaration for retained experts.
18. Cal. Code Civ. Proc. § 2034.270: the parties must produce and exchange all discoverable reports and writings, if any, made by any designated expert.
19. Cal. Code Civ. Proc. § 2034.410: a party who receives an expert witness list may depose any expert on it.
20. Cal. Code Civ. Proc. § 2034.430: (b) the party noticing the deposition pays the expert's reasonable and customary hourly or daily fee for time at the deposition, from the time noticed in the deposition subpoena, or from the expert's arrival should that be later, until the expert is dismissed, regardless of whether the expert is actually deposed by any party attending; (c) counsel representing the expert or a nonnoticing party who is late pays the fee for the period of the delay; (d) that fee may not exceed the fee charged to the party who retained the expert.
21. Cal. Code Civ. Proc. § 2018.030: (a) a writing reflecting an attorney's impressions, conclusions, opinions, or legal research or theories is not discoverable under any circumstances; (b) other attorney work product is not discoverable absent unfair prejudice or injustice.
22. Williamson v. Superior Court (1978) 21 Cal.3d 829, 834-835, 838-839: material of a derivative character, including appraisals and other expert opinions developed as a result of the initiative of counsel in preparing for trial, is protected as attorney work product, and the expert's initial status as consultant changes once the expert becomes a designated prospective witness (at 834-835); the report at issue was nonetheless ordered disclosed because the expert's withdrawal flowed from an illegal agreement to suppress evidence (at 838-839). Decided under the same work product protections then codified at former Code Civ. Proc. § 2016(b).
23. Cal. Code Civ. Proc. § 1258.210: in eminent domain, not later than the 10th day after the trial date is selected a party may demand an exchange of expert witness lists and statements of valuation data, with waiver for noncompliance.
24. Cal. Bus. & Prof. Code § 11300 et seq.: Real Estate Appraisers' Licensing and Certification Law, administered by the California Bureau of Real Estate Appraisers.
25. Cal. Bus. & Prof. Code § 11319(a): the Uniform Standards of Professional Appraisal Practice constitute the minimum standard of conduct and performance for a licensee in any work or service performed that is addressed by those standards.
26. Title XI of FIRREA, 12 U.S.C. § 3331 et seq.: establishes the Appraisal Subcommittee and the National Registry of state-certified and state-licensed appraisers.
27. Fed. R. Evid. 702 (as amended eff. Dec. 1, 2023): the proponent must demonstrate it is more likely than not that the admissibility requirements are met and that the opinion reflects a reliable application of the methodology to the facts; Fed. R. Evid. 703 (bases of opinion) and 705 (disclosure of underlying facts or data).
28. Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993): trial judges must screen expert testimony for reliability and relevance.
29. Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999): the reliability gatekeeping function extends to technical and other specialized expertise, not only scientific testimony.
30. Fed. R. Civ. P. 26(a)(2)(B): retained experts must provide a signed written report with specified contents; Fed. R. Civ. P. 26(b)(4)(B) and (C): draft reports and most attorney-expert communications are protected.
31. Fed. R. Bankr. P. 9017: the Federal Rules of Evidence apply in cases under the Bankruptcy Code.
32. USPAP (2024 edition, effective Jan. 1, 2024): ETHICS RULE, Conduct (an appraiser must perform assignments with impartiality, objectivity, and independence) and Management (no assignment or compensation arrangement contingent on the reporting of a predetermined result, a direction in assignment results that favors the cause of the client, the amount of a value opinion, the attainment of a stipulated result, or the occurrence of a subsequent event directly related to the appraiser's opinions and specific to the assignment's purpose); RECORD KEEPING RULE (workfile must exist before report issuance; retain at least 5 years after preparation or 2 years after final disposition of any judicial proceeding in which the appraiser provided testimony related to the assignment, whichever period expires last); STANDARDS 3 and 4 (appraisal review development and reporting).

Related reading

• Condemnation appraisal
• Severance Damages: Valuing Injury to the Remainder in a California Partial Taking
• What is USPAP?