+25 Basement Waterproofing Estimates References. Web the national average cost for waterproofing a basement ranges between $2,000 and $7,000. Web basement waterproofing, from basic damp proofing to total encapsulation, costs homeowners between $3 and $10 per square foot,* averaging $3,250 for a 500 square foot basement.
However, most homeowners pay around $5,000 to waterproof their basement, crawl spaces and foundation. Exterior waterproofing involves excavating all around the house to the full depth of the foundation walls, then installing a waterproof coating or membrane topped by drainage panels. The typical cost range for basement waterproofing is between $2,300 and $7,575, with a national average cost of $4,920.
