California buyers and sellers may begin seeing a residential appraisal report that looks different from the familiar form used for years. That does not necessarily mean the lender ordered a different kind of valuation or that a new rule changed the home's value. It may mean the appraisal was completed using the new Uniform Appraisal Dataset—UAD 3.6—and the redesigned Uniform Residential Appraisal Report, or URAR. Fannie Mae and Freddie Mac began broad production on January 26, 2026. During this period, lenders may use either the legacy UAD 2.6 format or the new UAD 3.6 format. For new appraisal reports submitted to the Uniform Collateral Data Portal on or after November 2, 2026, UAD 3.6 becomes mandatory.
What UAD 3.6 is designed to change
The Uniform Appraisal Dataset is the standardized data structure used to communicate residential appraisal information electronically. Fannie Mae and Freddie Mac explain that the update aligns appraisal data with a newer industry data standard and creates a more flexible, data-driven reporting structure. The redesigned URAR replaces a collection of familiar form numbers—including the traditional 1004 single-family form and 1073 condominium form—with one dynamic structure that adapts to the property and assignment. Instead of forcing many property details into fixed boxes or free-form addenda, the new design can present relevant fields and sections based on the subject property, inspection type, and appraisal information. That does not mean every report will have the same length. A condominium, two- to four-unit property, manufactured home, or property with accessory units may display different sections from a straightforward one-unit residence.
The 2026 transition dates that matter
The joint Fannie Mae and Freddie Mac timeline identifies four major phases. Limited production ran from September 8, 2025 through January 25, 2026. Broad production runs from January 26 through November 1, 2026, when all lenders may use UAD 3.6 but UAD 2.6 is still permitted. On November 2, 2026, all new appraisal reports submitted to UCDP must use UAD 3.6; a new UAD 2.6 submission will receive a fatal message and a not-successful status. The remaining UAD 2.6 pipeline-revision window ends May 3, 2027. The mandate is based on the appraisal report's initial UCDP submission date—not merely the loan-application date, appraisal effective date, contract date, or scheduled closing date.
Why two buyers may receive different-looking reports before November 2
During broad production, both UAD 2.6 and UAD 3.6 may be valid for new submissions. One lender may already be using the redesigned report while another is still completing its transition. Even transactions in the same city and month can therefore produce reports with different layouts. A different appearance is not, by itself, evidence that one appraisal is more accurate or that one lender used a different definition of market value. The credibility of the result still depends on the appraiser's property identification, market data, comparable selection, adjustments, analysis, condition observations, and support for the final opinion. Buyers and sellers should avoid comparing the number of pages as a measure of quality.
Property details will matter even more than the form name
The redesigned structure is intended to capture property and market information in more discrete, repeatable fields. Before the appraisal appointment, the parties should organize factual records that may help the appraiser understand the property without trying to influence the value. Useful items can include a concise list of completed improvements with approximate dates; permits or final approvals for additions and conversions; solar ownership, lease, or power-purchase documentation; condominium or association information requested through the lender's process; legal unit count and records for accessory dwelling units; explanations of unusual utilities, access, easements, or site features; and access instructions for all rooms and structures. The list should be factual. It should not tell the appraiser which value to reach, conceal defects, characterize unverified work as permitted, or present marketing claims as legal facts.
Sellers should reconcile the listing story with the property record
An appraisal transition does not cure inconsistencies between the home, the listing, public records, permits, disclosures, and the lender's file. If the listing markets a space as a bedroom, unit, ADU, or finished living area, the legal status and physical characteristics still need careful review. Before launch, a seller and listing broker should identify discrepancies rather than wait for the appraiser or underwriter to discover them. Examples include an enclosed patio counted in living area, a garage conversion, an addition with uncertain permits, a second kitchen, a separately occupied space, or a bedroom count that differs across records. The correct response is to describe what is verified, disclose what is known, obtain available records, and let the appraiser and lender apply the relevant rules.
Buyers should read the analysis, not only the final value
The opinion of value is important, but the report can also reveal information relevant to financing and due diligence. Buyers should read the subject description, condition and quality observations, comparable-sales analysis, market commentary, photographs, sketches or floor-plan information when included, and any repair or completion conditions. A value at or above the purchase price does not mean every property question is resolved. The appraisal is prepared for the lending decision and is not a home inspection, title report, permit verification, insurance approval, engineering opinion, or guarantee of condition. If a buyer sees a factual error, the issue should be raised through the lender's reconsideration or appraisal-review process with specific supporting evidence.
What happens to legacy reports after the mandate
The November 2 mandate does not automatically convert every earlier appraisal to UAD 3.6. The joint FAQ states that revisions to a UAD 2.6 report initially submitted before the mandate may continue in UAD 2.6 through the transition window, using the existing document file identification. New UAD 2.6 reports submitted on or after November 2 will not be accepted successfully through UCDP. A transaction after November 2 could therefore still involve a revision to an older-format report if the original submission occurred before the mandate. The lender must determine whether the existing report remains usable, whether a revision is appropriate, or whether a new appraisal is required.
The format is changing; disciplined preparation is not
UAD 3.6 is a major reporting transition for appraisers, lenders, appraisal management companies, software providers, and the Enterprises. For buyers and sellers, the strongest preparation remains recognizable: verify property facts early; organize supporting documents without directing the value; provide complete access; keep appraisal, inspection, disclosure, title, insurance, and loan approval as separate due-diligence tracks; review the delivered report for factual accuracy; and preserve contract and financing timelines while questions are resolved. The new report may look different. The transaction still benefits from accurate information, independent analysis, documented communication, and enough time to address a genuine discrepancy before it becomes a closing emergency.
Frequently asked questions
When does UAD 3.6 become mandatory?
For new appraisal reports submitted to the Uniform Collateral Data Portal on or after November 2, 2026. The initial UCDP submission date controls.
Can lenders use UAD 3.6 now?
Yes. Broad production began January 26, 2026, and all lenders may submit UAD 3.6 reports during the transition.
Why did my appraisal look different from my neighbor's?
Before November 2, lenders may be using either the legacy or redesigned format. The dynamic UAD 3.6 report can also display different sections based on the property and assignment.
Does the new form change my home's market value?
No automatic value change results from the form itself. The appraiser still must analyze the subject property, relevant market data, comparable properties, and assignment conditions.
Is the appraisal a substitute for a home inspection or permit review?
No. Appraisal, inspection, disclosures, title, permits, insurance, and engineering address different questions.
Can a UAD 2.6 report be revised after November 2?
Potentially. A UAD 2.6 report initially submitted before the mandate may continue to receive revisions in the legacy format through the transition period. The lender controls the submission and determines whether a revision or new report is required.
Should a seller give the appraiser a list of improvements?
A concise factual list with dates and available permits or invoices can be useful. It should not state a target value, mischaracterize unverified work, or conceal known conditions.
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Official resources
About the author
Bethany Lopez is a California Real Estate Broker and Mortgage Loan Originator. She is the Broker/Owner of Bethany Lopez Real Estate, DRE #01774923, and a Mortgage Loan Originator with Answer Home Lending, Inc., NMLS #2027014. Brokerage and mortgage services are separate.
How this information is prepared
Bethany Lopez Real Estate distinguishes general education from transaction-specific advice, identifies official sources when relied upon, and corrects material inaccuracies. Read the editorial standards and corrections policy.
Bethany Lopez is a California Real Estate Broker, DRE #01774923, and Mortgage Loan Originator, NMLS #2027014. Appraisal requirements, UAD implementation, lender processes, property eligibility, underwriting, report use, reconsideration procedures, and transition dates may change and depend on the loan, lender, investor, appraisal assignment, property, and transaction. This article provides general educational information and is not an appraisal, commitment to lend, loan approval, property inspection, permit determination, legal opinion, tax advice, or financial advice. The appraiser must remain independent. Consumers should follow the instructions of their lender and appropriately licensed or qualified professionals. Equal Housing Opportunity.
© 2026 Bethany Lopez Real Estate. All rights reserved.