10 to 35 dollars per square feet.
The cost of a basement is between 10 and 35 dollars per square feet. Let's say an average basement is 1,000 square feet of finished space. So the cost of a basement is between $10,000 and $35,000. 10k if you're doing most of the work yourself and up to $35,000 if you're hiring a contractor to finish your basement. Now. The categories you need to add to calculate the cost of building a basement include: 1  Design and engineering fees. 2  Building and permit fees. 3  Soil and grading costs. 4  Foundation and footings. 5  Building materials. 6  Plumbing and electrical. 7  Miscellaneous supplies. 8  Finish What is the cost? If a typical foundation would be approximately 4 feet high, and a typical basement is 8 feet high how much more would it cost? Excavating for a crawl space foundation: If the ground is flat, for instance, an excavator would dig about 2 to 2 1/2 feet of depth. As you can see, with some planning, your excavation cost difference should be minimal. Footings: Cost for footings should be the same for a crawlspace or basement based on an average load bearing of the soil at 2000 psf (pounds per square foot). Walls: 4 foot high for crawlspace and 8 foot high for a basement. 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.
http://www.ifinishedmybasement.com/getting-started/cost-of-a-basement/ http://www.ehow.com/how_4422330_calculate-cost-building-basement.html http://buildblock.com/how-to-build/basements/ http://buildblock.com/how-to-build/basements/ http://home.costhelper.com/basement.html
cost of building a basement