From Harvard University:
http://www.jchs.harvard.edu
The JCHS "is Harvard University's center for information and research on housing in the United States.
The Joint Center analyzes the dynamic relationships between housing markets and economic, demographic, and social trends."
The site features publications on topics such as the state of the nation's housing (with information and data about house production, ownership, and prices), home remodeling, rentals, and more.
Also includes an overview of research topics and articles written by JCHS members.
Searchable.