- Slab leak repair usually costs $820 to $4,200, about $2,400 typical.
- Finding and fixing a water line leak under a concrete slab floor.
What slab leak repair costs
Slab leak repair usually runs $820 to $4,200. A typical job lands near $2,400. Finding and fixing a water line leak under a concrete slab floor.
| Price | |
|---|---|
| Low end | $820 |
| Typical | $2,400 |
| High end | $4,200 |
Sources: Fixr and This Old House, combined as shown below. Local wages shift the typical price from about $2,124 in Arkansas to $2,861 in Hawaii.
What drives the price
- Repair method. Breaking the slab to fix the spot, rerouting the line through walls or attic, or lining the pipe each cost differently.
- Finding it. Detection with acoustic or thermal tools is its own charge.
- Floors. Tile or hardwood over the leak has to come up and go back.
Extra costs to plan for
| Item | Price | Source |
|---|---|---|
| Slab leak detection | $150 to $600 | This Old House |
Ask whether each of these is in the quote. Two bids for the same slab leak repair can be far apart only because one includes them.
Slab leak repair cost by state
These state figures are Koira estimates. The labor share of the national price, about 50%, moves with each state's median wage for construction and extraction workers; materials stay at the national price. Use them to sanity-check a slab leak repair quote.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $739 | $2,164 | $3,786 |
| Alaska | $931 | $2,724 | $4,767 |
| Arizona | $810 | $2,369 | $4,146 |
| Arkansas | $726 | $2,124 | $3,717 |
| California | $903 | $2,644 | $4,628 |
| Colorado | $831 | $2,433 | $4,258 |
| Connecticut | $903 | $2,644 | $4,626 |
| Delaware | $819 | $2,396 | $4,193 |
| District of Columbia | $893 | $2,613 | $4,573 |
| Florida | $750 | $2,195 | $3,841 |
| Georgia | $753 | $2,203 | $3,856 |
| Hawaii | $978 | $2,861 | $5,008 |
| Idaho | $797 | $2,332 | $4,080 |
| Illinois | $965 | $2,824 | $4,942 |
| Indiana | $836 | $2,447 | $4,281 |
| Iowa | $819 | $2,398 | $4,197 |
| Kansas | $788 | $2,308 | $4,039 |
| Kentucky | $776 | $2,271 | $3,974 |
| Louisiana | $754 | $2,206 | $3,861 |
| Maine | $825 | $2,416 | $4,227 |
| Maryland | $822 | $2,407 | $4,212 |
| Massachusetts | $943 | $2,761 | $4,832 |
| Michigan | $831 | $2,433 | $4,258 |
| Minnesota | $910 | $2,663 | $4,660 |
| Mississippi | $732 | $2,143 | $3,750 |
| Missouri | $835 | $2,444 | $4,277 |
| Montana | $830 | $2,429 | $4,250 |
| Nebraska | $780 | $2,284 | $3,997 |
| Nevada | $835 | $2,444 | $4,277 |
| New Hampshire | $824 | $2,411 | $4,219 |
| New Jersey | $916 | $2,680 | $4,691 |
| New Mexico | $754 | $2,206 | $3,860 |
| New York | $895 | $2,619 | $4,583 |
| North Carolina | $750 | $2,195 | $3,842 |
| North Dakota | $831 | $2,433 | $4,257 |
| Ohio | $838 | $2,452 | $4,292 |
| Oklahoma | $745 | $2,180 | $3,815 |
| Oregon | $865 | $2,532 | $4,432 |
| Pennsylvania | $827 | $2,420 | $4,234 |
| Rhode Island | $844 | $2,470 | $4,323 |
| South Carolina | $751 | $2,199 | $3,848 |
| South Dakota | $755 | $2,210 | $3,868 |
| Tennessee | $758 | $2,218 | $3,882 |
| Texas | $749 | $2,191 | $3,834 |
| Utah | $804 | $2,352 | $4,116 |
| Vermont | $821 | $2,404 | $4,207 |
| Virginia | $799 | $2,338 | $4,091 |
| Washington | $930 | $2,721 | $4,763 |
| West Virginia | $807 | $2,361 | $4,132 |
| Wisconsin | $848 | $2,483 | $4,344 |
| Wyoming | $821 | $2,404 | $4,207 |
Cities inside a state can run well above or below the state figure.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $1,000 to $4,000 | $2,500 | Counted |
| This Old House | $630 to $4,400 | $2,300 | Counted |
We take the middle of the guides' lows for the low end, the middle of their highs for the high end, and the middle of their averages for the typical slab leak repair price. Where a guide gives no average we use its midpoint. All read on October 9, 2026.
Labor share used: 50%. None of the guides splits labor out for this job, so this share is Koira's working assumption for plumbing 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
Plumbing calls come in when something is leaking, so a fast answer and a clear price for the fix and the parts matter most.
Koira's free Office plan turns a slab leak repair quote into a clean estimate the customer approves on their phone, then into an invoice they can pay. Price this job in Koira, free.
Sources: Fixr, slab leak repair cost; This Old House, slab leak repair 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.