The mortgage industry is in the middle of its most significant appraisal data transition in over a decade. UAD 3.6 — the updated Uniform Appraisal Dataset — and the redesigned Uniform Residential Appraisal Report (URAR) form that accompanies it represent a fundamental change to how residential appraisals are structured, completed, and submitted to Fannie Mae and Freddie Mac.
For lenders, this transition is not just a technology update. It changes what a compliant appraisal looks like, what UCDP will flag as errors, and what the Submission Summary Report (SSR) reports back after submission. AMCs and their review processes need to be calibrated to the new standard — not just updated to accept the new file format.
What Changed with UAD 3.6
The new URAR form under UAD 3.6 is a comprehensive redesign, not an incremental update. The layout is modernized, data fields have been expanded and clarified, the market condition analysis section has been restructured, and the form now requires more explicit documentation of how appraisers selected comparable sales and developed adjustments. The underlying data format changed from UAD 2.6 XML to a UAD 3.6 ZIP file format that includes XML, PDF, and image components.
UCDP began accepting UAD 3.6 submissions in September 2025 during the Limited Production Period, with broad production beginning January 26, 2026. During the transition, both UAD 2.6 and UAD 3.6 submissions are accepted. After the transition is complete, all new conventional appraisals will need to comply with UAD 3.6 requirements.
The SSR generated by UCDP for UAD 3.6 submissions is also new — providing feedback in both PDF and JSON formats through UCDP’s direct integration channel. Lenders and AMCs who are used to reading the 2.6-era SSR need to familiarize themselves with the updated report structure.
How R3 AMC Is Supporting the UAD 3.6 Transition
R3 AMC’s founder background includes years as a Fannie Mae senior analyst tracking exactly these kinds of GSE data and policy changes. R3 AMC monitors UAD and UCDP updates continuously and ensures its review processes and panel appraisers are current with GSE requirements. As an appraiser-owned AMC, R3 AMC also has direct insight into how practicing appraisers are adapting to the new form and where quality control issues are most likely to emerge during the transition period.
Frequently Asked Questions
When will UAD 3.6 become mandatory?
UCDP began accepting UAD 3.6 ZIP files in September 2025 during the Limited Production Period. Broad production with full industry participation began January 26, 2026. Lenders should verify current GSE guidelines for the mandatory compliance deadline as the transition schedule may be updated.
Does R3 AMC support UAD 3.6 submissions through UCDP?
Yes. R3 AMC’s process supports UAD 3.6 formatted appraisals and UCDP submission under the new standard. R3 AMC monitors appraiser appraisal software compatibility and form adoption to ensure the panel is producing compliant UAD 3.6 reports.
Will UAD 3.6 affect appraisal costs or turnaround times?
During the transition period, some temporary adjustment in turnaround time is possible as appraisers adapt to the new form requirements and software updates. Well-prepared appraisers working with current appraisal software should not experience significant disruption. R3 AMC monitors panel performance through the transition and communicates proactively with lenders about any timeline impacts.
R3 AMC is UAD 3.6 ready. Contact us at orders@r3amc.com or (702) 658-1191 to ensure your appraisal pipeline is prepared for the transition.