The Low-Income Housing Tax Credit (LIHTC) property locations depicted in this map service represent the general location of the property. The locations of individual buildings associated with each property are not depicted here. The location of the property is derived from the address of the building with the most units. Location data for HUD-related properties and facilities are derived from HUD's enterprise geocoding service. The LIHTC database contains information on 40,502 projects and almost 2.6 million housing units placed in service since 1987.

A Difficult Development Area (DDA) for the Low Income Housing Tax Credit program is an area designated by the U.S. Department of Housing and Urban Development (HUD) with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). All designated DDAs in Metropolitan Statistical Areas (MSA) or Primary Metropolitan Statistical Areas (PMSA) may not contain more than 20% of the aggregate population of all MSAs/PMSAs, and all designated areas not in metropolitan areas may not contain more than 20% of the aggregate population of the non-metropolitan counties.

The Low-Income Housing Tax Credit (LIHTC) is the most important resource for creating affordable housing in the United States today. The LIHTC database, created by HUD and available to the public since 1997, contains information on 48,672 projects and 3.23 million housing units placed in service since 1987. Low-Income Housing Tax Credit Qualified Census Tracts must have 50 percent of households with incomes below 60 percent of the Area Median Gross Income (AMGI) or have a poverty rate of 25 percent or more. Difficult Development Areas (DDA) are areas with high land, construction and utility costs relative to the area median income and are based on Fair Market Rents, income limits, the 2010 census counts, and 5-year American Community Survey (ACS) data.

This service provides spatial data and information on Difficult Development Areas (DDAs) used for the Low Income Housing Tax Credit program. DDAs are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately.

This service identifies U.S. Census Block Groups in which 51% or more of the households earn less than 80 percent of the Area Median Income (AMI). The Community Development Block Grant (CDBG) program requires that each CDBG funded activity must either principally benefit low- and moderate-income persons, aid in the prevention or elimination of slums or blight, or meet a community development need having a particular urgency because existing conditions pose a serious and immediate threat to the health or welfare of the community and other financial resources are not available to meet that need. With respect to activities that principally benefit low- and moderate-income persons, at least 51 percent of the activity's beneficiaries must be low and moderate income.

2016-2020 ACS 5-Year estimates of housing characteristics compiled at the Tract level. These characteristics include Occupancy Status, Tenure By Household Size, Median Number Of Rooms By Tenure, Units In Structure, Tenure by Units In Structure, Tenure By Year Structure Built, Median Year Structure Built By Tenure, Bedrooms, Tenure By Bedrooms, Contract Rent, Median Contract Rent, Bedrooms By Gross Rent, Median Value, Mortgage Status By Median Value (Dollars), and Tenure By Selected Physical And Financial Conditions.

2016-2020 ACS 5-Year estimates of socioeconomic characteristics compiled by the 2010 US Decennial Census Tracts. These characteristics include Aggregate Travel Time To Work Of Workers By Sex, Travel Time To Work, Poverty Status In The Past 12 Months Of Families By Household Type By Tenure, Poverty Status Of Individuals In The Past 12 Months By Living Arrangement, Household Income In The Past 12 Months, Median Household Income In The Past 12 Months, Aggregate Household Income In The Past 12 Months, Median Family Income In The Past 12 Months, Median Non-family Household Income In The Past 12 Months, Sex By Age By Employment Status For The Population 16 Years And Over, Tenure By Occupants Per Room, Total Population in Occupied Housing Units by Tenure by year Householder Moved into Unit, Tenure By Housing Costs As A Percentage Of Household Income In The Past 12 Months, Sex By Occupation For The Civilian Employed Population 16 Years And Over, Median Earnings In the Past 12 Months (In 2015 Inflation-Adjusted Dollars) by Sex by Educational Attainment for the Population 25 Years and Over, Educational Attainment by Employment Status for the Population 25 to 64 Years, and Occupation By Median Earnings In The Past 12 Months (In 2015 Inflation-Adjusted Dollars) For The Full-Time, Year-Round Civilian Employed Population 16 Years And Over.

Comprehensive Housing Affordability Strategy (CHAS) data documenting the extent of housing problems and housing needs, particularly for low income households, at the County level. This is estimated by the number of households that have certain housing problems and have income low enough to qualify for HUD’s programs (primarily 30, 50, and 80 percent of median income).

This service identifies U.S. Census Tracts in which 51% or more of the households earn less than 80 percent of the Area Median Income (AMI). The Community Development Block Grant (CDBG) program requires that each CDBG funded activity must either principally benefit low- and moderate-income persons, aid in the prevention or elimination of slums or blight, or meet a community development need having a particular urgency because existing conditions pose a serious and immediate threat to the health or welfare of the community and other financial resources are not available to meet that need. With respect to activities that principally benefit low- and moderate-income persons, at least 51 percent of the activity's beneficiaries must be low and moderate income.