If heating or air conditioning is unavailable in the basement, then the installation of a dehumidifying unit can be a simple fix that costs about 250. If the water pipes require insulation, then it will run between. Your Best Bet: Exterior Waterproofing. The surest way to waterproof your basement walls is a fullscale exterior waterproofing solution. Its also the most expensive often 15, 000 to 30, 000. The national average cost of an exterior waterproofing job for a basement is typically between 8, 700 and 14, 500, but may be more or less depending on where you live. The price can be as high as 80, 000, depending on how accessible the targeted areas are, how much digging is required and how much landscaping or other work must be restored. Typical project cost for exterior basement waterproofing: 80 100 per linear foot. Interior excavation waterproofing. Contractors say homeowners often choose an interior waterproofing method because it costs significantly less than exterior waterproofing. The cost of many sealant based waterproofing products are 48 a square foot. Waterproofing Cost Comparison 20X40 Basement With 8 Tall Poured Concrete Walls As noted, a basement waterproofing contractor will charge somewhere between 5000 and 10, 000 for the sealing method; the average charge for the seepage method is 10, 000 to 20, 000 and more. The contractor installing curtain drains will charge the most in basement waterproofing cost, with average totals between 10, 000 and 20, 000 and higher. On average, basement waterproofing costs around 7, 000, though minor waterproofing can cost as little as 300 to 500. Be sure to get multiple quotes and details about the job. Be sure to get multiple quotes and details about the job. Hiring a waterproofing or basement contractor to patch and seal your basement interior can run 1, 0002, 000 or more depending on the size of the basement and the extent of the cracks and leaks. Hiring someone to repair and seal your basement interior can run 2501, 000 or more; if the project also includes outside excavation plus installing a waterproof barrier and footer drains, the total cost starts around 5, , 000, but can run 11, , 000 or more. Jul 19, 2017Waterproofing a basement to make the space useable. What determines how much a project will cost? We'll go through the variables. Dec 19, 2018How much does it cost to waterproof a basement? Dec 19, 2018 The cost for waterproofing a basement can range from 500 to 3, 500 depending on the extent of the waterproofing and amount of work involved. The average homeowner spends around 4, 047 to seal a basement or foundation, with minor repairs costing as little as 600. More comprehensive issues that include fixing cracks in the foundation or adding drains gutters can cost upwards of 10, 000. Depending on a number of variables, that cost can range anywhere from 2, 024 and 6, 140. May 07, 2019Cost To Seal A Basement or Foundation Most homeowners spend between 2, 491 to 4, 259 nationally. Get free estimates from local contractors who can Seal a Basement or Foundation.