For 2013, the SCF reports a mean family net worth at $534,600, which means that if you added up the total net worth of all families surveyed and divided that by the total number of families in the survey, the resulting value would be $534,600.
Typically the most expensive type of foundation, the full basement variety consists of a slab basement floor with stem walls that extend from the basement floor to the main level of the building and footers. Homeowners who choose this type of foundation will incur higher costs due to the need for deeper excavation. Grading and forms are also needed in addition to drainage, waterproofing and concrete reinforcements in the basement walls. People who choose a full basement foundation may pay as much as $30,000.
The cost of the basic finished basement could range from $15-per square foot to $30-per square foot. A new tile floor system will start at $6-per square foot and could go up to $20-per square foot.