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.
Raised Perimeter foundation involves form materials and excavation processes such as light grading, piers holes and footing trenches. The excavation cost is $1.0 to $2.0 per square foot. The cost of materials and labor for a simple raised perimeter foundation is around $10.00 -$15 per square foot. Other items to be considered for raised perimeter foundation include site drainage, sidewalks, exterior stair landing, driveway retaining walls, perimeter insulation and so on.