Key takeaways
- Typical cost: $630–$4,400 per repair, about $2,280 on average.
- Average repair: about $2,280
- Leak detection: $150–$400
- Reroute: $600–$4,000
- Timeline: An easy slab leak can be fixed in about 3 hours; difficult ones take up to 3 days, plus floor repair.
- Permits: Rerouting or repiping commonly needs a plumbing permit; confirm locally.
Slab Leak Repair Cost at a glance
Slab leak repair typically costs $630–$4,400, with an average around $2,280. Detection, access method and floor repair drive the total.
| Item | Typical cost | Notes |
|---|---|---|
| Leak detection | $150–$400 | About $280 typical |
| Pinhole leak repair | $150–$800 | |
| Pipe leak repair | $250–$850 | |
| Single burst pipe | $200–$3,000 | |
| Reroute (abandon the line) | $600–$4,000 | Runs through walls or attic |
| Cured-in-place lining | $80–$250 per foot |
Prices run lowest in states like Arkansas, Mississippi and Alabama and highest in Hawaii, California and Alaska. See the full breakdown and cost by state →
Slab Leak Repair cost questions
- What is the cost of leak detection? The typical cost of leak detection is $150–$400. About $280 typical.
- What is the cost of pinhole leak repair? The typical cost of pinhole leak repair is $150–$800.
- What is the cost of pipe leak repair? The typical cost of pipe leak repair is $250–$850.
- What is the cost of single burst pipe? The typical cost of single burst pipe is $200–$3,000.
- What is the cost of reroute (abandon the line)? The typical cost of reroute (abandon the line) is $600–$4,000. Runs through walls or attic.
- What is the cost of cured-in-place lining? The typical cost of cured-in-place lining is $80–$250 per foot.
- What is the cost of direct access (break the slab)? The typical cost of direct access (break the slab) is $700–$5,000. Plus floor repair.
- What is the cost of drain line leak? The typical cost of drain line leak is $800–$5,000.
- What is the cost of slab repair? The typical cost of slab repair is $300–$6,750.
- What is the cost of water damage repair? The typical cost of water damage repair is $500–$15,000+. If the leak ran a long time.
Signs of a slab leak
- Warm or damp spots on the floor
- An unexplained jump in your water bill
- The sound of running water when everything is off
- A sudden drop in water pressure
- New cracks or a raised floor
- Musty odors, mildew or rising humidity
Reroute vs. direct access vs. lining
| Method | Typical cost | Notes |
|---|---|---|
| Reroute the line | $600–$4,000 | New pipe through walls or attic; slab stays intact |
| Direct access | $700–$5,000 | Break the slab, fix the pipe, patch the floor |
| Cured-in-place lining | $80–$250 per foot | Seals pipe from inside |
What causes slab leaks
- Pipe corrosion
- Shifting or expansive soil
- High water pressure
- Construction or installation defects
Leaks under a slab can damage the foundation over time. Settled slabs may need foundation repair.
Common slab leak repair questions
How much does slab leak repair cost?
Most slab leak repairs cost about $630–$4,400. Detection adds $150–$400.
Should I reroute or jackhammer a slab leak?
Rerouting ($600–$4,000) avoids breaking the floor and is often preferred; direct access ($700–$5,000) may make sense for a single accessible leak.
What are the signs of a hot water slab leak?
Warm spots on the floor, a water heater that runs constantly and a higher water or energy bill are common signs.
How do I know if I have a slab leak?
Turn off every fixture and watch the water meter. If it moves, call a plumber with leak detection equipment.
Timeline, permits and DIY
How long it takes
An easy slab leak can be fixed in about 3 hours; difficult ones take up to 3 days, plus floor repair.
Permits
Rerouting or repiping commonly needs a plumbing permit; confirm locally.
DIY or hire a pro?
Hire a licensed plumber: pinpointing a slab leak needs electronic detection equipment.
Questions to ask contractors
Ask every bidder the same questions so you can compare quotes apples to apples.
- How did you locate the leak, and how confident are you?
- Can the line be rerouted instead of breaking the slab?
- Who repairs the flooring afterward?
- Is the rest of the plumbing likely to leak next?
Maintenance that prevents costly repairs
- Watch for unexplained water bill increases
- Keep water pressure under about 80 psi
- Check the water meter with fixtures off once a year
Frequently asked questions
Does homeowners insurance cover slab leaks?
Policies often cover sudden water damage and the cost to access the pipe, but not the worn pipe itself or gradual leaks. Check your policy.
How long does slab leak repair take?
About 3 hours for an easy leak and up to 3 days for a difficult one. Rebuilding floors can take weeks.
Can a slab leak damage my foundation?
Yes. Slab repair can cost $300–$6,750, and settled slabs may need piers.
How do I check for a slab leak?
Turn off all water and watch your water meter. If it keeps moving, you likely have a leak; a plumber can pinpoint it.
In-depth slab leak repair guides
Slab Leak Repair by city
Sources: HomeAdvisor — Slab leak repair cost · HomeServe — Slab leak repair cost. Ranges are rounded estimates; see our editorial policy.