Property Valuation Data
Assessor. AVM. Home Equity.Real Estate Valuation Data to Gain that Competitive Edge
ATTOM Data Solutions includes assessor data for over 155 million properties and their valuations, if included by the county record. Also included is recorder data for more 430 million transactions covering over 3,140 counties. All this nationwide property data feeds our proprietary Loan Model engine, which generates the estimated loan positions, balances, and equity for a property. ATTOM offers the most flexible selection of robust property data and possesses the strongest property valuation data continuity across various delivery platforms.
ATTOM Offers Accurate Real Estate Valuations
Improve your target marketing or prospecting to increase your sold rate. Mitigate risk by using robust data and improve your business decision process.
AVM
A technologically advanced property automated valuation model providing lender-grade results with increased transparency through the application of robust statistical procedures to property data from the nation’s largest multi-sourced property database.
Assessor Tax Values
The annual tax amount calculated by the county’s tax collector or local taxing authority for real estate property. This is generally a percentage (i.e. 1.1%) of the Assessed or Market Value.

Assessor Market Values
During a reassessment of a home’s property tax evaluation, an assessor will estimate a property’s value in relationship to comparable sales. This value is ultimately used by the assessor to determine the tax liability.
Home Equity
The difference between a property’s current market value and the remaining debt that is owed on the property’s mortgage.
Comparable Sales
During an evaluation of a property, a comparable sales report is derived, which shows the price of home sales within the surrounding area to help determine the value of a home. Various property characteristics are taken into account during the analysis.
Have Questions About Valuation Data?
How Can You Use ATTOM’s Valuation Data?
Real Estate
Get enhanced comparison reports on estimated sales price details, event details, snapshots, and history details that help provide a more complete picture of a property.
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Institutional Investors
Combine valuation data with other sources of data, such as neighborhood, parcel boundaries, or pre-mover data, to get a better understanding of a neighborhood and its investment potential.
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Insurance
Improve business decision processes and mitigate risk using various analytic applications like insurance quote estimation, property-specific service estimates, or property and market evaluations.
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Marketing
Increase sold rate by targeting the right prospects the first time. Create accurate prospect lists, collateral content and detailed marketing performance reports.
ATTOM’s Real Estate Valuation Data Webinar
Listen to an in-depth discussion from ATTOM’s Vice President of Product Management, Sean Mooney as he discusses the various real estate valuation datasets that ATTOM provides and how they are being utilized by customers to gain a competitive edge.

This webinar will cover:
- ATTOM AVM – What is an AVM (Automated Valuation Model) and what elements are included in our model
- Tax Assessor Values – Understanding and utilizing the various values available from assessor data
- Estimated Home Equity – How we estimate home equity and why it’s important
- Estimated Sales Values – What is an estimate sales value and how you can use it
- And more…
ATTOM’s Data is Your Business Advantage
Comprehensive
A multi-sourced, enhanced national warehouse that contains information on more than 155 million U.S. properties including:
- 29.6 Billion Rows of Data
- 9,000 Data Fields
- 20TB Warehouse
- 99% Population Coverage
Flexible
Access ATTOM through a variety of flexible solutions to consume the most efficient real estate data for your specific business needs including:
Quality Data
Our rigorous Enterprise Data Management Program (EDMP) involves more than 20 steps that validate, standardize and enhance the real estate data we collect:
- Property Address Standardization
- Owner Name Parsing
- ATTOM ID Matching
- Fusion of Multi-Sourced Data
- Data Governance
Learn more about ATTOM and view our Table of Data Elements.