Property Characteristics



An extensive list of characteristics for a property covering lot size, building size, interior features, exterior features, and lot features

Year Built 1997 Bedrooms 4 Fireplace  
Lot Size (Sq. Ft.) 5,663 Bathrooms (Full) 1 A/C Central
Building Area (Sq. Ft.) 2,182 Bathrooms (Partial) 1 Heating Forced Air
Garage (Sq. Ft.) 416 Total Rooms 9 Pool POOL/SPA



Property Valuation: Estimating the value of a property can be important for investors in identifying properties to buy or sell. One approach to establishing a property's value is to consider a range of property 

Target Marketing: Vendors will often target products or services to homeowners based on specific property characteristics. e.g. pool cleaning services are looking for properties with swimming pools. Roofing repair companies are looking for houses with roofs of a particular type or age.


Property Characteristics are sourced almost exclusively from the Tax Assessor Office of the jurisdiction to which a property belongs. Because most jurisdictions rely heavily on property taxes as a source of income, the Tax Assessor data provides one of the most comprehensive sources of public domain information about properties. The accuracy of the information is very much dependent on the processes for gathering and updating this information.

Note: When properties are listed for sale, the property listing will often contain information that is more comprehensive and more up-to-date than the characteristics collected by the Tax Assessor. Strict controls are often placed by the MLSs that own this listing data. To ensure compliance with these requirements, ATTOM only makes this information available as a separate data element.


The following tables can be used to access Property Characteristics information. When delivering solutions to customers, some or all of the property characteristics information found in these tables may be consolidated into one or more views.


Rows: 155 million
Columns: 177
Family: Property

Dimension Tables

The following Dimension (Dim) tables are used in conjunction with the PropertyFeature table as a way to translate various codes found in the table into descriptive values.

Table Key Description  
DimAddressType AddressTypeKey Convention used to address mail (standard, PO Box, Mail Route)  
DimBuildingFireResistanceClass ConstructionFireResistanceClass Classification of the building's fire resistance  
DimBuildingShape BuildingSHapeKey Commonly used shapes of the main structure  
DimConstruction ConstructionKey The material used for the main structure  
DimCoolingDetail CoolingDetailKey The primary method used to provide cooling to buildings  
DimCounty CountyKey County  
DimDrivewayMaterial DrivewayMaterialKey Presence and material used to construct a driveway  
DimExterior ExteriorKey The primary material used on the exterior of the primary building  
DimFence FenceKey Presence and type of fence on the property  
DimFireplace FireplaceKey Presence and type of fireplace(s) used  
DimFloor FloorKey The primary type of flooring material used  
DimFoundation FoundationKey Type of foundation used for the primary structure  
DimGarage GarageKey Presence and type of garage  
DimHeating HeatingKey The primary method used to provide heating to buildings  
DimFuel FuelKey Primary heating fuel used  
DimJurisdiction JurisdictionKey Type of tax jurisdiction. Usually county, but can be a town in some areas.  
DimPool PoolKey Presence and type of swimming pool  
DimPorch PorchKey Presence and type of porch attached to the primary building  
DimPropertyType PropertryTypeKey Type of property e.g. residential, commercial  
DimRoof RoofKey    
DimRoof RoofKey The material used to cover the roof of the primary structure  
DImRoofConstruction RoofConstructionKey The primary roof framing structure  
DimSewer SewerKey Type of sewer used on the property  
DimStructure StructureKey The specific structural style used  
DimTypography TypographyKey The general topography of the property  
DimView ViewKey Type of view present (ocean, mountain, etc.)  
DimWater WaterKey The water source for the property


The following endpoints can be used to access property characteristics:

  • Property Basic Profile
  • Property Detail
  • Property ID
  • Property Snapshot

For more details, see ATTOM API Developer Portal

Understanding the Data


Because there is not a universally accepted standard for property identification (like the use of SSN to identify US citizens), properties can be difficult to identify. Alternatives such as APN or street address can change over time and they often lack a consistent way of being formatted. ATTOM addresses this by assigning a single, permanent identifier to each property in the form of a very precise number (integer).

  • Being numbers (integers), ATTOM IDs can be processed very quickly in relational databases, improving the speed with which properties can be identified and matched.
  • An ATTOM ID of 99999999 is assigned for properties that we cannot identify/match

Product Articles (P-Articles)

All solution packs containing the Property Characteristics data element will include the following p-articles to help you understand and use the data: -

  • Product Characteristics 101
  • Bedroom/Bathroom Counts
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