What Appraisers Need to Know Before UAD 3.6 Goes Live

November 2, 2026 is not that far away.

That is the date Fannie Mae and Freddie Mac have set for mandatory UAD 3.6 compliance. After years of preparation, updates, and deadline extensions, the new Uniform Appraisal Dataset format becomes the required standard for residential appraisals delivered to the GSEs.

A lot of appraisers have been watching this from a distance, figuring they will deal with it when they have to. That window is closing. Here is what actually changes, what it means for day-to-day practice, and where appraisers should be focusing their preparation now.

What UAD 3.6 Is

The Uniform Appraisal Dataset is the standardized data specification that governs how residential appraisal information is structured, submitted, and transmitted through the mortgage ecosystem. The current version has been in place for over a decade. UAD 3.6 is the most significant overhaul in that time.

The core shift is from form-based reporting to data-driven reporting. The old model was built around specific forms, like the 1004 or the 1073, with fixed fields in fixed places. UAD 3.6 moves to a more flexible structure where data fields are standardized but the presentation of the report is not locked to a specific form layout.

Reports that look different from what lenders and AMCs are used to seeing are going to create confusion unless everyone in the pipeline is prepared.

What Changes in the Report

Property Characteristics

UAD 3.6 expands and restructures how property characteristics are captured. Some fields that were previously freeform become standardized data fields with defined values. This means more consistency across reports, but it also means appraisers need to populate fields they may have handled loosely before.

Green and Energy Features

This is one of the most significant additions for appraisers working in markets where solar,green certification, or energy efficiency features are common.

Under the prior format, solar panels and energy features were handled inconsistently. Some appraisers noted them in the comments. Some made adjustments without explanation. Some ignored them. UAD 3.6 introduces structured data fields for energy efficiency features, including:

• HERS ratings
• Green certifications like LEED, Energy Star, and Passive House
• Solar system characteristics
• Other energy-related features

If you have not been consistently collecting and documenting this information, November is the deadline to have a system in place.

Insight Solar can help you capture solar system characteristics consistently, so this data is ready when UAD 3.6 requires it.

Adjustment Reporting

How adjustments are documented and supported is changing. UAD 3.6 creates more structure around adjustment reporting, which is consistent with the broader push toward better adjustment support and transparency. Appraisers who have solid processes for developing and supporting their adjustments will adapt more easily. Learn More

Comparable Data Fields

The comparable sales section gets more structured as well. Fields for how comparables were identified and why they were selected become more prominent. The reporting structure formalizes expectations that have previously been left to appraiser judgment.

What Lenders and AMCs Are Expecting

Here is something worth saying plainly: lenders and AMCs are not uniformly ready for this either.

The GSE transition is a whole-pipeline change. Appraisal management companies need to update their platforms. Lenders need to update their review systems. Technology vendors need to deliver updated software. The mortgage ecosystem is interconnected in ways that mean a lot of parties have to get ready at roughly the same time.

The appraisers who come through this most cleanly are the ones who understand the changes well enough to explain them to clients when asked.

Where to Focus Your Preparation

Your Software

If your appraisal software vendor has not communicated a clear UAD 3.6 update timeline, ask. You cannot produce UAD 3.6-compliant reports without software that supports the new format.

The Energy and Green Fields

If you are working in markets where solar is common or green certifications are a selling point, you need a data collection process that captures HERS ratings, certification details, and solar system information consistently. Build that process now so it is habit by November.

Adjustment Documentation

Review how you are currently developing and supporting your adjustments. UAD 3.6 increases the visibility of how adjustments are reported. If your current process involves adjustments that would be hard to explain under scrutiny, use the time before November to tighten it.

Training and CE

Both Fannie Mae and Freddie Mac have published resources on UAD 3.6. Appraisal professional organizations have been developing education around the changes. If you have not already, prioritize this before the fall.

What Does Not Change

UAD 3.6 is a reporting and data format change. It does not change the underlying requirements for appraiser competency, USPAP compliance, or the fundamental methods appraisers use to develop opinions of value.

The sales comparison approach still works the same way. The requirement to develop a credible opinion of value through appropriate methodology does not change because the format for reporting it does.

The Bigger Picture

UAD 3.6 has been positioned as part of a longer-term GSE effort to modernize the appraisal data infrastructure. Better structured data enables better analysis, better quality review, and ultimately better tools for the people who use appraisal data downstream.

The appraisers who treat UAD 3.6 as a one-time compliance hurdle to get past are going to find themselves repeating this exercise. The ones who use the transition to build better data habits and tighter documentation processes are building something that compounds.

November 2 is the deadline. The preparation is what happens before it.

Key Takeaways

• UAD 3.6 becomes mandatory for GSE appraisals on November 2, 2026, marking the most significant dataset overhaul in over a decade
• The format shifts from form-based to data-driven reporting with expanded fields for property characteristics, green and energy features, and adjustment documentation
• New structured fields for HERS ratings, green certifications, and solar systems require appraisers to develop consistent data collection processes now
• Your appraisal software must be updated to support UAD 3.6 compliance, so confirm your vendor's timeline and training availability
• The transition impacts the entire mortgage pipeline, lenders and AMCs included, so understanding the changes well enough to explain them to clients will set you apart
• UAD 3.6 does not change USPAP requirements or appraisal methodology, it changes how data is structured and reported
• Using this transition to strengthen your adjustment documentation and data collection habits builds long-term competency, not just compliance

FAQ

When does UAD 3.6 become mandatory?

November 2, 2026 is the GSE-mandated effective date for UAD 3.6 compliance on appraisals delivered to Fannie Mae and Freddie Mac. Appraisers should confirm current requirements with the GSEs directly, as guidance details may be updated.

Do I need new software for UAD 3.6?

Yes. UAD 3.6 requires appraisal software that supports the updated data structure.

Does UAD 3.6 change how I develop my opinion of value?

No. UAD 3.6 changes how appraisal data is structured, reported, and submitted. It does not change USPAP requirements, competency standards, or the appraisal methods used to develop opinions of value.

What are the new green and energy feature fields in UAD 3.6?

UAD 3.6 includes structured fields for HERS ratings, green certifications such as LEED, Energy Star, and Passive House, solar system presence and characteristics, and other energy-related features. Review the GSE documentation for complete field specifications.

What happens if I submit a report in the old format after November 2?

Reports not meeting UAD 3.6 requirements would not comply with GSE submission requirements after the mandatory date. Confirm requirements with your client base before the deadline.

Where can I find official UAD 3.6 training resources?

Fannie Mae and Freddie Mac have both published documentation and guidance on UAD 3.6. Appraisal professional organizations including the Appraisal Institute have developed education resources. Check your state's CE requirements for any mandated UAD 3.6 training.