Key takeaways
- Short answer: Slab leak detection typically costs $150–$400, about $280 on average.
- Detection: $150–$400
- Average repair: about $2,280
- Accurate detection avoids unnecessary floor damage
- Typical slab leak repair cost: $630–$4,400 per repair.
What detection costs and includes
| Item | Typical cost |
|---|---|
| Leak detection | $150–$400 |
| Pinhole leak repair | $150–$800 |
| Reroute | $600–$4,000 |
| Direct access (break slab) | $700–$5,000 |
Detection usually includes isolating hot and cold lines and pinpointing the location so the repair method can be chosen.
Check for a leak yourself first
- Turn off every faucet and water-using appliance.
- Read the water meter and wait 30–60 minutes.
- If the meter moved, you likely have a leak.
- Feel floors for warm spots that suggest a hot-water line.
Related questions
Is slab leak detection covered by insurance?
Some policies cover the cost of finding and accessing a leak; the pipe repair itself often isn't. Check your policy.
How long does leak detection take?
Often a few hours for a single visit.
Who does slab leak detection?
Licensed plumbers or specialist leak detection companies with electronic equipment.
Other slab leak repair questions homeowners ask
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.
Slab Leak Repair at a glance
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.
DIY or pro?
Hire a licensed plumber: pinpointing a slab leak needs electronic detection equipment.
What slab leak repair costs
Slab leak repair typically costs $630–$4,400, with an average around $2,280. Detection, access method and floor repair drive the total.
Keep reading
Sources: HomeAdvisor — Slab leak repair cost. Ranges are rounded estimates; see our editorial policy.