What Is a Real Estate Appraisal? A Plain Definition for Claremont Homeowners

A real estate appraisal is a licensed appraiser's opinion of the value of one identified property, as of one stated date, developed and reported under the Uniform Standards of Professional Appraisal Practice (USPAP). USPAP defines an appraisal as "the act or process of developing an opinion of value; an opinion of value," and California's appraiser law uses nearly the same words: "the act or process of developing an opinion of value for real property." It is a reasoned opinion, not a price or a promise.

This page takes the definition apart phrase by phrase for Claremont homeowners told they need "an appraisal". Appraisals on this site are prepared by Gordon Hall, California Certified Residential Real Estate Appraiser, BREA No. AR003877, and the license can be checked on the Bureau of Real Estate Appraisers license lookup.

The definition, one phrase at a time

"An opinion"

An appraisal is a conclusion reached by judgment and supported by evidence. It is not a measurement like a lot line, and it is not the price the house later sells for. Because two qualified appraisers can read the same sales differently, the report has to show which sales were used, why, and how each difference was handled.

"Of value"

Every appraisal names the value it develops. Usually that is market value, which Fannie Mae and the federal banking agencies define as the most probable price a property should bring in a competitive and open market under all conditions requisite to a fair sale. A sale between relatives or a price shaped by unusual concessions sits outside it. What market value means in plain words walks through each condition.

"For real property"

The subject property, the property being appraised, is identified by address and legal description, and the report says what is included: the land, the house, a permitted ADU or a rear unit. The house is appraised as it physically exists, so for a Craftsman bungalow near the Colleges the report states whether an enclosed back porch counts as finished living area.

"As of a date"

The effective date, the date the opinion of value applies to, is printed on the report. Federal guidelines, following USPAP, recognize three kinds: current, retrospective (a past date, such as a date of death) and prospective (a future date, such as an ADU's completion). There is no "value of the house" in general, only the value on that date.

"The act or process of developing"

The definition covers the work as well as the conclusion. Before anything is measured, the appraiser settles the intended use, what the report will be used for; the intended users, the people entitled to rely on it; and the scope of work, the type and extent of research and analysis. Those choices decide how far the comparable search reaches and whether the interior is inspected. USPAP then sets separate requirements for developing the opinion and for reporting it in writing.

Who may appraise a house in California

California licenses appraisers through the Bureau of Real Estate Appraisers (BREA). Business and Professions Code section 11320 says no person may engage in federally related real estate appraisal activity, or use the title of a licensed appraiser, without an active license, and section 11319 makes USPAP the minimum standard of conduct and performance for every licensee. Of BREA's four levels, a Certified Residential license covers any one-to-four-family property without regard to transaction value or complexity, a Padua Hills custom home as readily as a ranch house north of Foothill. The BREA license levels are explained separately.

What the law says is not an appraisal

Section 11302(b) draws one line in so many words: "appraisal" does not include an opinion given by a real estate licensee in the ordinary course of business, and that opinion "shall not be referred to as an appraisal." BREA states the reverse case: whenever a California-licensed appraiser reports an opinion of value for real property, whatever the format, it is an appraisal and must comply with USPAP.

• An agent's CMA, a comparative market analysis, is an opinion of likely list or sale price. It is not an appraisal.
• An automated estimate, such as a Zestimate, a Redfin Estimate or another AVM, is a statistical estimate built from records and nearby sales. It is not an appraisal.
• The county assessment is the taxable value under California's assessment rules, set in Claremont by the Los Angeles County Office of the Assessor. It is not an appraisal.
• A cash offer is a price one buyer will pay on stated terms. It is not an appraisal.

The same subdivision also sets aside California probate referees, who value inventory property in a probate estate: the appraiser law does not apply to them unless the transaction is federally related. Probate referee vs. independent appraisal explains why some estates order both, and appraisal vs. estimate sets the other numbers side by side.

The definition applied to one Claremont house

Take the kind of assignment that comes in: an heir needs the value of a pre-1940 bungalow near the Village as of the owner's date of death.

• Opinion. One reconciled conclusion, with the weight given to each sale.
• Value. Market value, with the definition quoted in the report itself.
• Property. The house measured on site, the enclosed porch and later rear addition each identified, and their permit status noted or stated as an extraordinary assumption, an assumption about uncertain facts that, if false, could change the result.
• Date. The date of death, so the comparable sales are those that closed around that date, not last month's.
• Development. Intended use: estate administration. Intended users: named. Scope of work: a search among older houses near the Village before it reaches north of Foothill.

Change any one element and it becomes a different appraisal. The report page by page shows where each element sits in the document, and property appraisal vs. property valuation sorts the appraisal from the wider family of valuations.

What an appraisal does not decide

USPAP describes the appraiser as one who is expected to perform valuation services competently and in a manner that is independent, impartial and objective. The appraiser is independent of every party, including the one who pays. Fees are set by the scope of the assignment and quoted before work begins, and they do not depend on the value. Federal Regulation Z (12 CFR 1026.42) bars the parties to a consumer mortgage from coercing or influencing the appraiser toward a value.

What happens next belongs to the reader: the lender decides the loan, the court decides admissibility, and your CPA or attorney decides how a value is used. What a Claremont home appraisal measures, pocket by pocket shows how the evidence changes from the Village to Claraboya.

Next step

The Claremont area page describes the pockets, and the appraisal services list matches assignments to decisions. More is in the home appraisal in Claremont knowledge center. If your decision calls for an appraisal, request an appraisal or call (909) 324-6122; the intended use, scope and fee are settled before anything is scheduled.

Sources

• The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice (USPAP): appraisalfoundation.org (accessed November 6, 2026)
• California Business and Professions Code section 11302 (definition of appraisal; real estate licensee and probate referee exclusions): leginfo.legislature.ca.gov (accessed November 6, 2026)
• California Business and Professions Code section 11319 (USPAP as the minimum standard for licensees): leginfo.legislature.ca.gov (accessed November 6, 2026)
• California Business and Professions Code section 11320 (license required): leginfo.legislature.ca.gov (accessed November 6, 2026)
• Bureau of Real Estate Appraisers, Broker Price Opinions, Value Reconciliation, and other Alternative and Preliminary Valuation Products: brea.ca.gov (accessed November 6, 2026)
• Bureau of Real Estate Appraisers, Real Estate Appraiser License Levels: brea.ca.gov (accessed November 6, 2026)
• Fannie Mae Selling Guide B4-1.1-01, Definition of Market Value: selling-guide.fanniemae.com (accessed November 6, 2026)
• Interagency Appraisal and Evaluation Guidelines, 75 FR 77450 (December 10, 2010), glossary (effective dates, extraordinary assumption, market value): govinfo.gov (accessed November 6, 2026)
• Consumer Financial Protection Bureau, Regulation Z, 12 CFR 1026.42, Valuation independence: consumerfinance.gov (accessed November 6, 2026)
• California Bureau of Real Estate Appraisers, license lookup: brea.ca.gov (accessed November 6, 2026)

Gordon Hall, California Certified Residential Real Estate Appraiser, BREA No. AR003877 (lookup: https://www2.brea.ca.gov/breasearch/faces/party/view.xhtml?id=23601). Reports are prepared in conformity with the Uniform Standards of Professional Appraisal Practice (USPAP). Nothing here is legal or tax advice; admissibility is always the court's decision.