Use the replies in this thread to request and vote on new data partners you’d like added to the platform! We’re able to quickly add new data products to the platform and it helps us convince partners to join when we know there is interest from the community. Help us democratize access to research data!
You can view the existing data partners here: Data Partners Unlocking Academic Data Access for Research
Zillow’s Transaction and Assessment Database (ZTRAX)
https://www.zillow.com/research/ztrax/
It used to be available to academic researchers on a request-basis for free, but Zillow has decided to discontinue the program.
The Zillow Transaction and Assessment Dataset (ZTRAX) is the country’s largest real estate database made available free of charge to U.S. academic, nonprofit and government researchers. Zillow makes the data — previously inaccessible and/or prohibitively expensive — available in the interest of greater transparency in the real estate market. They are used by dozens of institutions to further research across various disciplines and to address important policy questions.
ZTRAX is updated quarterly and is continually growing. Released data include:
- More than 400 million detailed public records across 2,750+ U.S. counties;
- More than 20 years of deed transfers, mortgages, foreclosures, auctions, property tax delinquencies and more, for both commercial and residential properties;
- Property characteristics, geographic information and prior valuations for approximately 150 million parcels in 3,100+ counties nationwide.
ZTRAX does not contain:
- Zestimates
- Rent data (such as rent prices)
- Listing data (such as time on market)
- User search data
Great request. Will reach out to learn a bit more about why this is being discontinued.
Update: Spoke with the team at Zillow. Still trying to understand if there is an opportunity to keep elements of the program going. If you’re interested in continuing to access this data I’d encourage you to reach out to the Zillow team (ztrax@zillow.com) and request data delivery through Dewey.
Is there any chance that Dewey might be able to look into one or more commercially available voter files? The ones I’m most familiar with are L2 and Catalist. It might not be possible, but I figured it wouldn’t hurt to ask!
Great suggestion @max_kagan. We’re actually already talking with Catalist, hope we can get them on the platform in some capacity soon.