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.
Letâs say a foundation that is 28âx50â² costs $15,000. The cost per square foot (of finished home) would be $15,000/1400 = $10.71/SF for the smaller home and $15,000/2800 = $5.36 for the larger home. So this is just one example showing how the square foot costs for new construction are effected by many different aspects.