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.
If a homeowner is seeking to make basic changes in order to renovate a basement, then it can cost as little as $1,000 - $6,000. This means the walls and floor will be waterproofed, then carpet, wall panels, upgraded flooring or improved lighting might be added to make a basement feel like a living space.