- 
  
    FederalHousing Affordability Data System (HADS)Department of Housing and Urban Development — The Housing Affordability Data System (HADS) is a set of files derived from the 1985 and later national American Housing Survey (AHS) and the 2002 and later Metro...
- 
  
    FederalLow-Income Housing Tax Credit (LIHTC) Qualified Census Tract (QCT)Department of Housing and Urban Development — 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...
