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.
Slab foundation requires form materials and excavation process. The exaction cost is around $0.5 to $1.0 per square foot. The cost of constructing simple slab foundation is around $6.00 to $10.00 per square foot including the materials and labor. For complicated slab, the cost is around $15 to $20 per square foot.Raised perimeter foundation consists of a perimeter footing and a concrete stemwall upon which the walls and the floors are erected.he cost of constructing simple slab foundation is around $6.00 to $10.00 per square foot including the materials and labor. For complicated slab, the cost is around $15 to $20 per square foot.