Census 2010 (census.gov). Through American FactFinder you are able to obtain a multitude of housing data. Data are available from the 2010 Decennial Census and the American Community Survey.
Estimates (census.gov). The U.S. Census Bureau provides access to a variety of programs that deal with housing statistics. Data for the most part are available on a national level, but there are some programs that display information at State or sub-state geographies.