The average cost of a crawl space foundation is $13 per square foot, which translates to $13,000 for a home that is 1,000 square feet on the ground level. Foundation House Foundation Types ...

The International Building Code requires vented crawlspaces to have one square foot of ventilation per 150 square feet of crawl space area to obtain a 1/150 net free ventilation area, or NFVA.

Q: I would appreciate your opinion on whether I should hire a company to line the crawl space of my house. It's about 2,400 square feet, and I suspect the work would be pretty pricey. Is it worth ...