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.
We get the number $1,944 and $2592. Adding about $500 for additional support pillars under the house, should leave you with a good idea of how much a crawl space foundation will cost. Basement â Unfinished basement costs in the US vary from $12 to $28 per square foot.Soil conditions vary and it could be even more in some areas.dding about $500 for additional support pillars under the house, should leave you with a good idea of how much a crawl space foundation will cost. Basement â Unfinished basement costs in the US vary from $12 to $28 per square foot. Soil conditions vary and it could be even more in some areas.