ATTOM Home Price Index (HPI)
Hyperlocal. Predictive. Trusted.
Understand Home Price Movement with Confidence
ATTOM's Home Price Index (HPI) delivers a comprehensive view of residential home price appreciation across the United States, from the national level down to individual census blocks. Powered by machine learning and built on one of the nation's most trusted property data providers, ATTOM's HPI measures true market price movement rather than relying on median sale prices that can fluctuate based on the types of homes sold.
Updated monthly, ATTOM's HPI combines more than 30+ years of historical trends with forecasts extending up to 36 months, helping organizations identify emerging opportunities, evaluate market risk, improve predictive models, and build AI-powered applications. Utilizing ATTOM's AVM as well as its comprehensive property data, ATTOM's HPI provides a more complete picture of residential market conditions.
Go Beyond Median Home Prices
Unlike traditional home price indices that simply summarize recent sales activity, ATTOM's HPI uses machine learning to model long term price movement from millions of validated, arm's length residential transactions.
Every month, the U.S. home price index is rebuilt using the latest assessor, recorder, and MLS data, ensuring historical values reflect the most current information available. The result is a continuous monthly index that minimizes transaction noise while accurately capturing how local housing markets have changed over time.
ATTOM's HPI includes separate indices for single-family homes, condominiums, townhomes, and an all-residential composite, allowing organizations to analyze market performance at virtually every geographic level across the country.
Why Choose ATTOM's Home Price Index?
Hyperlocal Intelligence
Analyze residential price trends from the national level to metros, counties, ZIP Codes, neighborhoods, census tracts, census block groups, and census blocks.
Monthly Refreshes
Benefit from a complete monthly rebuild that incorporates the latest validated property data.
Forward Looking Forecasts
Anticipate market conditions with price forecasts extending up to 36 months.
AI-Ready Data
Power analytics, forecasting, automation, and AI agents with trusted property intelligence.
How Industries Use ATTOM’s Home Price Index
Identify appreciating markets, support acquisition strategies, improve pricing models, and enhance investment analysis.
Strengthen underwriting, collateral valuation, portfolio monitoring, and market risk assessment with hyperlocal price trends.
Evaluate changing property values to better understand replacement cost exposure and regional market conditions.
Monitor housing affordability, neighborhood trends, and local market performance to support planning and policy decisions.
Integrate hyperlocal home price intelligence into AI applications, analytics platforms, and property technology solutions.
Banks & Financial Institutions
Track residential market performance, support portfolio management, and improve forecasting across lending and investment operations.
Frequently Asked Questions
What is ATTOM’s Home Price Index?
ATTOM’s Home Price Index is a machine learning powered residential price index that measures home price appreciation across the United States, from the national level to individual census blocks.
How is ATTOM’s HPI different from median home prices?
Median sale prices only reflect the homes sold during a given period and can be influenced by changes in the mix of properties sold. ATTOM’s home price index measures the underlying movement of the housing market, providing a more stable and consistent view of price appreciation.
How often is ATTOM’s HPI updated?
The index is rebuilt every month using the latest validated property, assessor, recorder, and MLS data to ensure each series reflects the most current market information.
Does ATTOM’s HPI include forecasts?
Yes. ATTOM’s HPI includes forward-looking forecasts extending up to 36 months, helping organizations anticipate future market trends.
What property types are included?
The index includes separate series for single-family homes, condominiums, townhomes, and an all-residential composite.
How can organizations access ATTOM’s HPI?
ATTOM’s home price index is available through Property Data API, bulk data licensing, cloud delivery, and the MCP Server, making it easy to integrate trusted home price intelligence into analytics platforms, AI workflows, and business applications.
ATTOM's HPI White Paper – FREE
ATTOM provides transparency in its analytical process by offering a FREE detailed white paper, better explaining how ATTOM HPI works. This white paper provides insights into the data sources, algorithms, and methodologies used to calculate home price indices across the United States.
Related Data
A Variety of Solutions for Your Data Needs
Click here to get in touch with a data expert today and find out how your business can access ATTOM’s comprehensive property data via a variety of flexible formats, such as:
- Cloud Delivery
- ATTOM Nexus
- AI-Ready Solutions
- Property Data APIs
- Bulk Data Licensing
- MCP Server
- Property Navigator
- Neighborhood Navigator
- Real Estate Market Reports
- Match & Append
Discover ATTOM and view our Table of Data Elements.