An extensive list of characteristics for a property covering lot size, building size, interior features, exterior features, and lot features
|Lot Size (Sq. Ft.)
|Building Area (Sq. Ft.)
|Garage (Sq. Ft.)
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
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.
|Convention used to address mail (standard, PO Box, Mail Route)
|Classification of the building's fire resistance
|Commonly used shapes of the main structure
|The material used for the main structure
|The primary method used to provide cooling to buildings
|Presence and material used to construct a driveway
|The primary material used on the exterior of the primary building
|Presence and type of fence on the property
|Presence and type of fireplace(s) used
|The primary type of flooring material used
|Type of foundation used for the primary structure
|Presence and type of garage
|The primary method used to provide heating to buildings
|Primary heating fuel used
|Type of tax jurisdiction. Usually county, but can be a town in some areas.
|Presence and type of swimming pool
|Presence and type of porch attached to the primary building
|Type of property e.g. residential, commercial
|The material used to cover the roof of the primary structure
|The primary roof framing structure
|Type of sewer used on the property
|The specific structural style used
|The general topography of the property
|Type of view present (ocean, mountain, etc.)
|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