Property Data Resources

Fannie Mae has established a (single family) property data standard and API to collect data/images consistently. The process encourages the use of emerging technologies to capture property information, imagery, and floor plan. When a lender receives a value acceptance + property data offer they are required to obtain a property data collection (PDC) to validate the property description and eligibility. If the loan loses eligibility for value acceptance + property data due to changes to qualifying criteria made by the lender in DU, the PDC can be used to inform a hybrid appraisal in limited cases. The goals of this process are to provide efficiency in reducing appraisal fulfillment timelines, create more objective data, reduce bias, and address a growing appraiser capacity concern. 

Property data collection is the act of physically or virtually observing and reporting property characteristics in a fact-based manner. Property data collection is not an appraisal in that it does not involve the development of an opinion of value. The data collection can be performed by a trained and vetted property data collector and must adhere to Fannie Mae’s Property Data Standard. Once the PDC is collected and passes quality control checks, it must be submitted to Fannie Mae’s Property Data API. 

This page provides guidelines and resources for users of Fannie Mae’s Property Data API and/or Single Family Property Data Standard. 

Fannie Mae and Freddie Mac have worked together to develop the Uniform Property Dataset (UPD). This joint dataset will replace the Fannie Mae Property Data Standard at a future date. Visit the UPD page for more information.


Test Cases and Sample Files (V6)

Test Cases and Sample Files (V5) Retiring July 1, 2023