What the UAD and UCDP Requirements Mean for Your Loan
When you apply for a conventional mortgage that will be sold to Fannie Mae, your appraisal must follow two key systems that standardize how property values are reported and processed. These systems work behind the scenes, but they affect every conventional loan.
The Uniform Appraisal Dataset (UAD) is a standardized format that appraisers must use when completing your appraisal report. Think of it as a common language that ensures all appraisers describe properties the same way. Instead of one appraiser writing "good condition" and another writing "average condition" for similar properties, the UAD provides specific definitions and codes.
The Uniform Collateral Data Portal (UCDP) is the electronic system where your lender must upload your completed appraisal. This isn't optional — Fannie Mae requires lenders to submit appraisals through UCDP and receive a "Successful" status before they can sell your loan.
Which Appraisal Forms Must Use These Systems
The UAD requirements apply to the most common appraisal forms you'll encounter:
- Form 1004: Standard single-family home appraisal
- Form 1004 Desktop: Desktop appraisal (no interior inspection)
- Form 1004 Hybrid: Hybrid appraisal (third-party data collection)
- Form 1073: Individual condo unit appraisal
- Form 1073 Hybrid: Hybrid condo appraisal
The UCDP submission requirement covers these forms plus three additional ones: manufactured home appraisals (Form 1004C), small rental property appraisals (Form 1025), and co-op appraisals (Form 2090).
If you're buying a standard single-family home, townhouse, or condo, your appraisal will almost certainly use one of these forms and go through both systems.
How This Affects Your Loan Timeline
The UCDP submission adds a step to your loan process, but it typically happens automatically. After your appraiser completes the report, your lender uploads it to UCDP for processing. The system checks the data for completeness and consistency.
Most appraisals receive a "Successful" status quickly, but problems can cause delays. Common issues include missing photographs, incomplete property descriptions, or data that doesn't match UAD standards. If UCDP rejects the appraisal, your appraiser may need to make corrections and resubmit.
Your lender cannot sell your loan to Fannie Mae until UCDP shows "Successful" status. This means any UCDP problems could potentially delay your closing, though most issues get resolved within a few days.
What Happens If Your Appraisal Gets Revised
Sometimes appraisals need revisions after the initial report. Maybe the appraiser discovers additional information about a comparable sale, or the underwriter requests clarification on a property feature. When this happens, your lender must submit the final version — the one actually used to approve your loan — through UCDP.
The appraised value in the UCDP system must match exactly what your lender reports when selling your loan to Fannie Mae. This prevents discrepancies between the official appraisal and the loan data.
There's one exception: if your loan required a desk review or field review of the original appraisal, those review reports can't go through UCDP. In that case, the original appraisal still gets submitted to UCDP, but the loan value reflects the reviewer's conclusion.
Why Fannie Mae Requires These Systems
Fannie Mae implemented UAD and UCDP to improve appraisal quality and consistency across the mortgage industry. Before these systems, appraisers used different terminology and formats, making it difficult to compare properties or spot potential problems.
The standardized data helps Fannie Mae's automated systems flag unusual valuations or incomplete information. This reduces the risk of inflated appraisals that contributed to the 2008 housing crisis. The electronic submission through UCDP also creates a permanent record of each appraisal.
For you as a borrower, these systems mean more consistent appraisal standards and better quality control, even though you won't interact with them directly.
Common Issues That Can Slow Down Your Loan
Most UCDP submissions go smoothly, but certain problems crop up regularly. Appraisers sometimes forget to include required photographs or fail to use the correct UAD codes for property features. Missing or incomplete comparable sales data also triggers rejections.
Geographic issues can cause problems too. If your property is in a rural area or unique market, the appraiser might struggle to find adequate comparable sales that meet UAD requirements. This doesn't mean your loan won't get approved, but it might take longer to resolve.
Some appraisers are still learning the UAD requirements, especially for less common property types. If you're buying a manufactured home, condo, or co-op, make sure your lender uses an appraiser experienced with UAD standards for that property type.
The good news is that these are technical issues, not problems with your property's value or your loan eligibility. Your lender and appraiser can usually fix UCDP rejections without ordering a new appraisal.
What You Don't Need to Worry About
As a borrower, you don't need to request UAD compliance or UCDP submission — your lender handles this automatically. You also don't need to review the technical data formats or understand the specific codes appraisers use.
The systems work in the background, and most borrowers never hear about them unless there's a problem. Your main concern should be the appraisal's conclusion about your property's value, not the technical formatting requirements.
If your lender mentions UCDP issues, don't panic. These are usually minor technical problems that get resolved quickly without affecting your loan approval or property value.
References
For the official guidelines, see B4-1.1-06: Uniform Appraisal Dataset (UAD) and the Uniform Collateral Data Portal (UCDP) in the Fannie Mae Selling Guide.
Mortgage guidelines change. Stay current.
Fannie Mae and Freddie Mac update their rules several times a year. Get notified when changes affect your mortgage eligibility, required documents, or loan terms.
No spam · Unsubscribe anytime
Original Fannie Mae Guideline Text
B4-1.1-06, Uniform Appraisal Dataset (UAD) and the Uniform Collateral Data Portal (UCDP) (06/04/2025)
Uniform Collateral Data Portal (UCDP)
Uniform Appraisal Dataset (UAD) 3.6 Policy
Uniform Appraisal Dataset (UAD)
The UAD standardizes appraisal data elements for a subset of fields on specific appraisal report forms and includes all data elements required to complete these forms. Fannie Mae requires that the following appraisal report forms are completed utilizing Appendix D of the UAD Specification when reporting the results of an appraisal for a conventional loan:
Uniform Residential Appraisal Report ( Form 1004),
Uniform Residential Appraisal Report (Desktop) (Form 1004 Desktop)
Uniform Residential Appraisal Report (Hybrid) (Form 1004 Hybrid)
Individual Condominium Unit Appraisal Report ( Form 1073), and
Individual Condominium Unit Appraisal Report (Hybrid) (Form 1073 Hybrid).
Other appraisal report forms may be completed using the standards contained in the UAD Specification to the extent those standards are applicable to that particular form. Lenders may obtain the most recent version of Appendix D of the Uniform Appraisal Dataset Specification and additional information on Fannie Mae’s website.
Uniform Collateral Data Portal (UCDP)
The UCDP is a portal through which lenders are required to electronically submit appraisal reports for conventional loans sold to Fannie Mae. The following appraisal report forms including all exhibits, addenda, and photographs, must be submitted through the UCDP and receive a “Successful” status from the UCDP prior to sale of the loan to Fannie Mae:
Uniform Residential Appraisal Report ( Form 1004),
Uniform Residential Appraisal Report (Desktop) (Form 1004 Desktop),
Uniform Residential Appraisal Report (Hybrid) (Form 1004 Hybrid)
Manufactured Home Appraisal Report ( Form 1004C),
Small Residential Income Property Appraisal Report (Form 1025),
Individual Condominium Unit Appraisal Report ( Form 1073),
Individual Condominium Unit Appraisal Report (Hybrid) (Form 1073 Hybrid), and
Individual Cooperative Interest Appraisal Report ( Form 2090).
If there are subsequent revisions to the appraisal report, the final version of the report that was utilized in making the underwriting decision must be submitted through the UCDP and receive a “Successful” status from the UCDP prior to sale of the loan to Fannie Mae. When submitting an appraisal report through the UCDP, lenders must ensure it is the unaltered report submitted by the identified appraiser.
Additionally, for loans that require an appraisal, lenders must ensure the appraised value as indicated on the appraisal submitted to UCDP matches the appraised value as reported at sale of the loan. An exception is allowed for this requirement when the appraisal used to underwrite the loan is a desk or field review of an existing appraisal because those types of reports cannot be submitted through the UCDP. In those instances, the appraised value reported at sale of the loan will reflect the value as stated in the desk or field review. However, the original appraisal that was the subject of review must have been submitted to UCDP.
Appraisal report forms not listed above cannot be delivered through UCDP with the exception of the Appraisal Update and/or Completion Certificate ( Form 1004D), which is optional. Lenders must maintain the applicable appraisal report and attachments in the loan file as part of the underwriting documents in accordance with A2-4.1-02, Ownership and Retention of Loan Files and Records. Lenders may obtain detailed information on the UCDP page on Fannie Mae’s website.
Uniform Appraisal Dataset (UAD) 3.6 Policy
Lenders using UAD 3.6 must follow the requirements in the UAD 3.6 Policy Supplement .
