A new online service allows people to map low-income housing tax credit (LIHTC) properties placed in service between 1987 and 2009. The free program was created by Novogradac and Company, and draws upon Department of Housing and Urban Development data of 33,000 LIHTC properties and almost 2,203,000 housing units. The data may be searched by city, county, Congressional district, state legislative district, and Census tract. Link here.