The Location Affordability Index (LAI) provides comprehensive neighborhood-level data on the true cost of living by combining both housing and transportation expenses across the United States. Developed by the U.S. Department of Housing and Urban Development (HUD) in collaboration with the Department of Transportation (DOT), this standardized dataset delivers critical affordability insights at the Census block-group level for all 50 states and the District of Columbia.
Beyond Housing: The True Cost of Living
A major innovation of the Location Affordability Index is its recognition that housing costs alone provide an incomplete picture of affordability. Transportation expenses represent the second-largest component of household budgets, yet they are rarely factored into housing decisions. The LAI addresses this gap by estimating combined housing and transportation costs across eight distinct household profiles that vary by income level, household size, and number of commuters—enabling users to assess location affordability based on their specific circumstances.
Neighborhood-Level Data That Explains the Full Picture
The Location Affordability Index also incorporates built-environment and demographic data to provide deeper context for cost estimates. Variables such as transit accessibility, walkability, employment proximity, and neighborhood characteristics help explain why transportation costs vary so dramatically between locations. Urban neighborhoods with robust public transit typically generate lower combined expenses than car-dependent suburban areas. Real estate professionals, urban planners, and economic development specialists rely on LAI data for site selection, market evaluation, and analyzing the relationship between land use patterns and household budgets.
Who Uses the Location Affordability Index – and How
Beyond individual decision-making, the Location Affordability Index serves as a vital resource for housing policy, transportation planning, and sustainable community development. Homebuyers use it to account for total cost of living. Municipal planners leverage it to evaluate the affordability impacts of zoning decisions and transit investments. Researchers draw on LAI data to study economic mobility, housing burden, and location efficiency – making it an essential tool for evidence-based decisions about America's communities and infrastructure.
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