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Boundary Data

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Boundaries Data
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Boundaries Category

Visual Mapping of Boundaries Data Brings Clarity to Decisions

Enhance your business processes with highly accurate location information for various map-oriented applications including listing portals, research tools, business intelligence mapping, public safety, and demographic applications. ATTOM has the most extensive boundary data for more than 155 million properties nationwide with flexible delivery solutions, such as APIs, bulk files, match & append, and more.

ATTOM’s Spatial Boundary Data Is Second to None

ATTOM has the largest database of spatial data for access to area and neighborhood boundaries. It starts with a hierarchy of macro-neighborhoods, neighborhoods, and sub-neighborhoods. The data is defined by multiple authoritative sources such as local government, real estate, tourism, local media, and customer feedback.

Parcel Boundary Data

Parcel Boundary Data

Parcel boundary data includes all the properties within a county updated as property boundaries are split, combined, or modified. Parcel boundary data is sourced using geographical information systems (GIS).

School Attendance Areas Data

School Attendance Areas

Define the area within which students are assigned to regular, neighborhood schools based on their location of residence.  These are researched and hand-digitized by our in-house GIS Team.

School District Boundaries Data

School District Boundaries

Define the area within which a school district is financially responsible for the education of resident students.  These are researched and hand-digitized by our in-house GIS Team.

Bf - National Building Footprints Data

Building Footprints

Offers a detailed national map featuring over 187 million building outlines, using advanced AI algorithms to accurately capture the shape and perimeter of structures for enhanced planning and analysis.

Neighborhood Boundary Data

Neighborhood Boundaries

This is a multi-level, hierarchical product with boundaries and names which reflect the consensus opinion of local residents.  These are researched and hand-digitized by our in-house GIS Team.

Residential Subdivision Data

Residential Subdivisions

This product contains boundaries for purely residential areas, including subdivisions, condos, townhomes, and apartments. These are researched and hand-digitized by our in-house GIS Team.

Census Boundaries Data

Census Boundaries

This dataset includes State, County, County Subdivision, Place, Tract, Block Group, Core Based Statistical Area, and other boundary layers.

Postal Boundary Data

Postal Boundaries

Zip Code and Postal City Boundaries are researched and hand-digitized by our GIS Team using information from the United States Postal Service.

Canadian Boundaries Data

Canadian Boundaries

This dataset includes Neighborhoods, Residential, Parcels, and Census Boundaries for Canada.

Flood Zone Data

Flood Zones

A geospatial database that contains current effective flood hazard data. FEMA provides flood hazard data to support the National Flood Insurance Program and to add transparency to flood risk and types of flooding.

How Can You Use ATTOM’s Boundaries Data?

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Real Estate

Create online maps of neighborhoods and school zones.
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Use data to determine when and if school and educational institution boundaries need to be altered to accommodate changing populations and markets.
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Understand the demographics of residential areas and assess the population and neighborhoods to target.
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Use geographic data on natural hazards for an accurate risk assessment.
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Understanding Boundary Data Products for Your Business

Listen in as industry expert Sean Mooney, VP of Product Management for ATTOM, discusses ATTOM’s premier geospatial boundary products, including Parcel, Neighborhoods, School Attendance Areas, and more.

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Key Takeaways:

  • Learn about the various ways these boundary products and associated contextual data sets – such as demographic, economic, environmental and crime – are utilized by customers for hyperlocal search, map display and visualization, data enrichment, and other geospatial analyses.
  • Discover why the accuracy, currentness, and coverage of these unified geospatial boundary products make them the superior choice for your business needs.

ATTOM’s Data is Your Business Advantage



A multi-sourced, enhanced national warehouse that contains information on more than 155 million U.S. properties including:

  • 70+ Billion Rows of Data
  • 9,000 Data Fields
  • 30TB Warehouse
  • 99% Population Coverage

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.

See How ATTOM Can Make a Difference for Your Business!