Open / Free Data

Apartment List Research provides original research, analysis, and data on the U.S. rental market. It offers insights into rental trends and housing market dynamics.

California property tax assessment data from county assessors.

Property tax assessment data including actual values, assessment rates, and taxing entities for Colorado properties.

Credit risk data on $2.3T single-family mortgage loans retained by Fannie Mae, accessible via Data Dynamics platform.

Official property assessment data for parcels in Cook County, Illinois.

The LA County eGIS Program provides geospatial data and technology to support Los Angeles County's vision.

Open access to Los Angeles County data on homelessness, justice, sustainability, poverty, child protection, and more via web platform.

Access 531,820 open datasets from U.S. federal agencies via searchable catalog for research, app development, and visualization.

API providing real-time data to identify if loans are owned by Fannie Mae for refinance and underwriting eligibility.

Federal Land Records provides access to federal land conveyance records, including historical documents and current interactive mapping tools.

Federal real property data including location, usage, and status for government-owned assets via bulk download.

Property-level physical climate risk data on flood, wildfire, and wind hazards via API and open data for real estate assets worldwide.

Assessment and property tax data from Florida county appraisers via online search interface.

HUD-eGIS Storefront offers access to HUD's geospatial datasets, mapping tools, and APIs covering housing and urban development programs.

1–10 ratings for public schools based on student progress, test scores, and college readiness across all 50 US states and D.C.

The Housing Vacancies and Homeownership program provides current information on rental and homeowner vacancy rates. It also includes characteristics of units available for occupancy.

GIS data for LA County unincorporated areas available for download and web use via ArcGIS services.

Official property assessment records for parcels in Los Angeles County.

Interactive map viewer displaying geographic, zoning, and climate risk data for Los Angeles County.

Public datasets on city finances, public safety, housing, infrastructure, and more for Los Angeles via web platform.

Real-time geospatial and city data for Los Angeles via Open Data Portal and GeoHub platforms.

Research and data on land use, taxation, and stewardship including manufactured housing and mobile home parks.

Official assessor records for taxable property in Maricopa County, Arizona.

Property tax, assessed values, tax class, exemptions, and parcel details for all New York City properties.

The Neighborhood Atlas hosts the Area Deprivation Index (ADI), a measure of neighborhood disadvantage used to evaluate factors impacting health across populations.

National and regional data on new privately-owned housing units authorized, started, under construction, and completed.

This is an open data feature service providing parcel ownership information for the Town of West Springfield.

PolicyMap provides data and mapping tools for understanding communities and markets. It offers access to thousands of datasets for exploration, mapping, and analysis.

The Primary Mortgage Market Survey (PMMS) provides weekly U.S. mortgage rate averages. Results are based on mortgage rates collected from loan applications submitted to Freddie Mac.

The Residential Energy Consumption Survey (RECS) provides data on household characteristics and energy usage for primary residences in the United States.

Open-access rural housing data including USDA rural development housing assets via web portal and API.

The State HFA Factbook compiles program activity data from state housing finance agencies (HFAs). It provides data on HFA program results and operations.

Property tax data including school district values, appraisal district info, and tax rates for properties across Texas.

Datasets on USDA Rural Development programs including single-family and multi-family housing, loan turn times, and resale properties.

Flood risk data and flood insurance information based on official FEMA flood maps and guidelines.

Provides datasets and tools analyzing neighborhood conditions affecting child opportunity and racial/ethnic equity across U.S. communities.