The real estate API market offers dozens of options spanning market analytics, property records, rental data, and AVM valuations. This guide maps each category and highlights the best option for common developer use cases.
Market Analytics APIs
These APIs provide aggregate statistics for geographies (ZIP, city, metro): prices, DOM, inventory, yields, affordability.
- ZipMarketData — ZIP-level market stats + HUD rental yield + Census affordability. Best for investment screening dashboards.
- Zillow Research API — Free research datasets (not a production API). Good for academic/batch analysis.
- Redfin Data Center — Free downloadable datasets. Requires manual download; no real-time API.
Property Records APIs
- ATTOM Data — Comprehensive US property database: tax records, ownership, deeds, permits.
- Regrid — Parcel data and boundaries. Strong GIS integration.
- CoreLogic — Enterprise-grade property data. High cost, best for lenders/servicers.
Rental Data APIs
- ZipMarketData — HUD SAFMR rental data + yield calculations. Free tier available.
- Rentcast — Property-level rent estimates + comp listings. Good for specific addresses.
- ApartmentList — National rent estimates (multifamily focus). Research-grade data.
Choosing the Right API
| Use Case | Recommended API |
|---|---|
| Investment screening across ZIP codes | ZipMarketData |
| Property valuation (AVM) for single addresses | Zillow / ATTOM |
| Rental comps for a specific address | Rentcast |
| Ownership / deed history | ATTOM / Regrid |
| Affordability analysis by metro | ZipMarketData |
| Consumer property search app | Zillow API |