The new UAD 3.6 marks one of the most significant changes to mortgage lending appraisals in over a decade. To ensure our lender and appraiser partners are prepared, we will be hosting webinars, providing resources, deploying surveys and more leading up to this industry milestone.
UAD 3.6 is the latest update to the Uniform Appraisal Dataset, part of Fannie Mae and Freddie Mac’s broader Uniform Mortgage Data Program (UMDP). It introduces a modernized appraisal data format (transitioning from XML to MISMO 2.6 XML) and a new, flexible data structure that better supports evolving appraisal needs.
The GSEs are updating the dataset to improve consistency, accuracy, and the ability to adapt to new property types and lending scenarios. It also aligns the appraisal process more closely with modern data standards.
UAD 3.6 enters Limited Production on September 8, 2025, when a small group of approved lenders will be allowed to submit UAD 3.6 reports to the Uniform Collateral Data Portal (UCDP). The Broad Production period begins on January 26, 2026, when all lenders may begin submitting UAD 3.6 without prior GSE approval.
UAD 3.6 becomes mandatory on November 2, 2026, when all new appraisal submissions must use UAD 3.6.
The UAD 2.6 pipeline will be fully retired on May 3, 2027.
*For full timeline, please download timeline.
Nope. You’ll continue placing appraisal orders through NAN as usual. Behind the scenes, we’ll ensure compliance with UAD 3.6 formatting so you don’t have to worry about the technicalities.
The biggest shift is structural. Instead of rigid forms like the 1004, reports will now be data-driven and property-type agnostic. That means more flexibility for hybrid and evolving loan types, plus more robust, consistent data output.
Not at this time. We’ll handle the transition on our end and keep you posted on any training or resources you may need as the industry moves closer to full implementation.
We’re actively working with our appraiser panel, technology partners, and QC teams to stay ahead of UAD 3.6 requirements. Our goal is to make this transition seamless for our lender partners.
There are no expected changes to standard turn times or fees during the transition. If that shifts at any point, we’ll communicate clearly and in advance.
You can reach out to NAN Chief Appraiser Bill Waltenbaugh (BWaltenbaugh@nan-amc.com) for anything related to UAD 3.6.
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