Photos: Hillary Clinton's life in the spotlight. Clinton waves to the media in January 1996 as she arrives for an appearance before a grand jury in Washington. The first lady was subpoenaed to testify as a witness in the investigation of the Whitewater land deal in Arkansas.
1 Adding a basement to an existing house can cost $30,000-$70,000 or more, depending on the size of the existing crawlspace or half-basement or if the house is on a slab foundation, and how much of the work is do-it-yourself and how much is done by contractors.
Average cost to build a house foundation is about $5,000 - $8,000 (1000 sq.ft. slab foundaton & footings). Find here detailed information about concrete foundation costs. Average cost to build a house foundation is about $5,000 - $8,000 (1000 sq.ft. slab foundaton & footings).