What Is UAD 3.6 (The New Residential Appraisal Process) and Why It Matters for Lenders.

The residential appraisal process is going through one of its biggest changes in decades. For nearly 20 years, lenders, appraisers, and underwriters have relied on familiar appraisal forms like the Uniform Residential Appraisal Report, also known as Form 1004. That system is now being phased out.

The new standard is called UAD 3.6, which stands for Uniform Appraisal Dataset 3.6. It is part of the appraisal modernization effort led by Fannie Mae and Freddie Mac. Instead of using several static appraisal forms, the industry is moving toward one dynamic, data-driven appraisal report.

What Is Changing?

Under UAD 3.6, the old form-based appraisal system is being replaced by a single, flexible Uniform Residential Appraisal Report. This new report changes depending on the property type, inspection type, and specific details of the assignment.

That means appraisals will no longer rely as heavily on long written explanations or rigid form templates. Instead, the new system will use more structured data, standardized fields, dropdowns, checkboxes, and detailed property information.

The goal is to make appraisal reports more consistent, easier to review, and easier to analyze with technology.

Why This Matters

For lenders, this is more than just a paperwork change. UAD 3.6 affects how appraisal data is collected, submitted, reviewed, and used in underwriting.

The new format allows appraisers to report more detailed information, including:

• Room-level condition and quality ratings

• Energy-efficient features

• Solar panels and green improvements

• Disaster mitigation features

• More specific property characteristics

• Better property image organization

This gives lenders and underwriters a clearer picture of the property and the collateral risk behind the loan.

New Submission Format

Another major change is how appraisals are delivered. Instead of submitting a single appraisal file, lenders will now submit a ZIP package to the Uniform Collateral Data Portal.

That package will include:

• An XML data file

• A human-readable PDF report

• A separate folder for property photos

This structure should make it easier for lenders, investors, and review systems to analyze the appraisal data and compare it against the property photos.

Important Timeline

The transition is already underway.

Broad production began on January 26, 2026, which means lenders can voluntarily begin using UAD 3.6 now.

The mandatory use date is November 2, 2026. After that, new appraisals sold to Fannie Mae and Freddie Mac must use the new UAD 3.6 format.

The full retirement of legacy appraisal forms is scheduled for May 3, 2027, when the grace period for revising older reports ends.

Why Lenders Should Prepare Now

Even though the mandatory deadline is not until November 2026, lenders should not wait until the last minute. This change impacts technology systems, appraisal management companies, quality control processes, underwriting workflows, and staff training.

Lenders will need to make sure their systems can handle the new ZIP file format, expanded data fields, and updated submission requirements. They should also confirm that their appraisal vendors, AMCs, and software providers are ready for the transition.

Underwriters and processors will also need to adjust. Instead of reviewing appraisals mainly as static documents, they will need to understand how to evaluate more structured, data-driven reports.

The Bottom Line

UAD 3.6 is a major shift in the appraisal industry. It replaces many of the old appraisal forms with a single dynamic report and moves the industry toward cleaner, more standardized property data.

For lenders, the change may require upfront preparation, but it should also create long-term benefits. Better data can lead to faster reviews, fewer revision requests, improved consistency, and stronger collateral risk management.

The lenders who prepare early will likely have a smoother transition and fewer disruptions when the new standard becomes mandatory.