- Basement waterproofing usually costs $2,450 to $8,200, about $5,000 typical.
- Waterproofing a leaking basement, interior or exterior.
- Price your own job with the calculator above; it breaks the job into lines.
What basement waterproofing costs
Basement waterproofing usually runs $2,450 to $8,200. A typical job lands near $5,000. Waterproofing a leaking basement, interior or exterior. By the square foot, Fixr put it at $3 to $10, with $6.50 in the middle.
| Price | |
|---|---|
| Low end | $2,450 |
| Typical | $5,000 |
| High end | $8,200 |
| Per square foot | $3 to $10 |
The range blends Fixr, HomeAdvisor and Bob Vila (method below). Where you live matters: Koira's estimate is $4,368 in Arkansas and $6,058 in Hawaii.
What drives the price
- Interior or exterior. This Old House puts interior methods at about $3,000 on average and exterior at $7,000.
- Size. Fixr says $3 to $10 a square foot.
- Cause. Gutters and grading are cheap fixes that should come first.
- Damage. Mold and cracks add cost.
Extra costs to plan for
| Item | Price | Source |
|---|---|---|
| Mold remediation | $500 to $3,500 | HomeAdvisor |
| Foundation repairs | $2,000 to $8,000 | HomeAdvisor |
These often show up as separate lines. When you compare basement waterproofing quotes, line them up item by item.
Basement waterproofing cost by state
Koira estimates for each state, built from the national $2,450 to $8,200. About 55% of a basement waterproofing price is labor, and only that part is scaled by the state's median wage for construction and extraction workers. A starting point, not a quote.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $2,185 | $4,458 | $7,312 |
| Alaska | $2,814 | $5,742 | $9,418 |
| Arizona | $2,416 | $4,930 | $8,085 |
| Arkansas | $2,140 | $4,368 | $7,163 |
| California | $2,724 | $5,560 | $9,118 |
| Colorado | $2,487 | $5,076 | $8,324 |
| Connecticut | $2,723 | $5,558 | $9,115 |
| Delaware | $2,446 | $4,991 | $8,186 |
| District of Columbia | $2,689 | $5,488 | $9,000 |
| Florida | $2,219 | $4,529 | $7,428 |
| Georgia | $2,229 | $4,550 | $7,461 |
| Hawaii | $2,968 | $6,058 | $9,934 |
| Idaho | $2,373 | $4,843 | $7,943 |
| Illinois | $2,926 | $5,971 | $9,793 |
| Indiana | $2,502 | $5,107 | $8,375 |
| Iowa | $2,448 | $4,996 | $8,194 |
| Kansas | $2,346 | $4,789 | $7,853 |
| Kentucky | $2,305 | $4,704 | $7,715 |
| Louisiana | $2,233 | $4,556 | $7,472 |
| Maine | $2,467 | $5,036 | $8,258 |
| Maryland | $2,458 | $5,015 | $8,225 |
| Massachusetts | $2,856 | $5,828 | $9,558 |
| Michigan | $2,487 | $5,076 | $8,324 |
| Minnesota | $2,745 | $5,602 | $9,188 |
| Mississippi | $2,161 | $4,411 | $7,234 |
| Missouri | $2,499 | $5,101 | $8,365 |
| Montana | $2,482 | $5,065 | $8,307 |
| Nebraska | $2,320 | $4,734 | $7,764 |
| Nevada | $2,499 | $5,101 | $8,365 |
| New Hampshire | $2,462 | $5,025 | $8,241 |
| New Jersey | $2,765 | $5,643 | $9,254 |
| New Mexico | $2,232 | $4,554 | $7,469 |
| New York | $2,696 | $5,501 | $9,022 |
| North Carolina | $2,220 | $4,531 | $7,431 |
| North Dakota | $2,487 | $5,075 | $8,323 |
| Ohio | $2,509 | $5,120 | $8,397 |
| Oklahoma | $2,203 | $4,496 | $7,373 |
| Oregon | $2,599 | $5,304 | $8,698 |
| Pennsylvania | $2,472 | $5,045 | $8,274 |
| Rhode Island | $2,529 | $5,161 | $8,465 |
| South Carolina | $2,224 | $4,539 | $7,444 |
| South Dakota | $2,237 | $4,565 | $7,486 |
| Tennessee | $2,246 | $4,583 | $7,516 |
| Texas | $2,215 | $4,521 | $7,414 |
| Utah | $2,396 | $4,890 | $8,019 |
| Vermont | $2,454 | $5,009 | $8,214 |
| Virginia | $2,380 | $4,857 | $7,965 |
| Washington | $2,811 | $5,737 | $9,408 |
| West Virginia | $2,406 | $4,911 | $8,053 |
| Wisconsin | $2,543 | $5,189 | $8,510 |
| Wyoming | $2,455 | $5,010 | $8,216 |
Rural areas and cities in the same state can differ a lot.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $3,000 to $10,000 | $5,000 | Counted |
| HomeAdvisor | $2,461 to $8,203 | Not given | Counted |
| Bob Vila | $2,300 to $7,575 | $4,920 | Counted |
How the basement waterproofing range is combined: low end from the middle of the guides' lows, high end from the middle of their highs, typical from the middle of their averages (a range's midpoint where no average is given). Figures read on each guide's page on October 9, 2026.
Labor share used: 55%. None of the guides splits labor out for this job, so this share is Koira's working assumption for basements and foundations work. State factor: the state's median hourly wage for construction and extraction workers over the national $28.63 (BLS, May 2025), kept between 0.7 and 1.4.
For contractors: price this job in Koira
Foundation and basement work is a big, worried purchase, so a clear scope and a fast written price help.
Run the numbers for a real basement waterproofing in the free basement waterproofing cost calculator, then save the result as an estimate. On Koira's free Office plan you build the estimate, text it, collect the deposit and turn it into an invoice when the basement waterproofing is done. Price this job in Koira, free.
Sources: Fixr, basement waterproofing cost; HomeAdvisor, basement waterproofing cost; Bob Vila, basement waterproofing cost; This Old House, basement waterproofing cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files). Prices checked October 9, 2026. More for your trade: how the trade runs on Koira.