Assessor Data

Comprehensive. Detailed. Up-to-Date.

Assessor Data Pinpoints Property Details on Parcels Nationwide

Covering more than 155 million properties in more than 3,000 counties nationwide, ATTOM’s multi-sourced assessor data offers a full menu of specific property data around the country. The data set includes publicly available information collected by county tax assessor offices, which can then be collated into specialized reports at various levels of geography.

The Best Assortment of Assessor Data for Your Business

No matter what your business’s ultimate use is for the data, ATTOM warehouses all of the essential types of assessor data needed to facilitate detailed analysis.

Assessor data details include:

Property Identification

Property Identification

  • Assessor’s Parcel Number (APN)
  • FIPS code
Property Ownership


  • Up to four owner names
  • Homeowner / Exemptions
  • Ownership rights / Vesting details
  • Individual / Trust / Company identifiers
Property Address


  • Property address
  • Owner mailing address
Legal Description

Legal Description

  • Block / Lot
  • Subdivision / Tract
  • Section-Township-Range
  • Additional text (limited metes and bounds)
Real Property Tax

Values and Taxes

  • Land / Improvement / Total
  • Tax amount
  • Assessed / Appraised / Market values
Property Characteristics

Property Characteristics

  • Beds / Baths / Room count
  • Interior and exterior features
  • Square footage (Gross / Building / Living / Basement)
  • Lot details (Footage / Pool / and more)

How Can You Use ATTOM’s Assessor Data?

Real Estate Portals

Real Estate Portals

Home and property characteristics are the essence of any piece of property.  Enhance your content with summary or full assessor parcel data.


From the number of bedrooms and bathrooms to the construction material used, assessor data is a critical baseline in generating property and casualty insurance policies.


Confirming address, ownership, and understanding beds, baths and square footage are part of underwriting a mortgage and often re-verified during the escrow process.


Marketers use the assessor’s property data to create targeted lists of homes and homeowners based on size of home, year built, occupancy status, length of ownership, property taxes and much more.
Home Valuations

Home Valuations

Companies performing valuations, BPOs and appraisals use assessor data to help automate those processes, making them faster and more efficient.


For online marketplaces that need to validate shipping information we can confirm the address, provide a parsed address back and correlate to FIPS, zip+4 and other valuable information.

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