Slab Leak Repair: $630 to $4,400 + Reroute or Fix (2026)

Slab leak repair cost

National figures. Flooring, drywall and water damage repairs are extra.

HomeAdvisor puts slab leak repair at $2,280 on average in June 2026, with a normal range of $630 to $4,400; This Old House, citing HomeAdvisor data, gives an average of $2,300. Fixr's average is $2,500, from $600 for detection and a small epoxy repair up to $15,000 for rerouting every pipe out of the slab. The method decides most of the bill.

Do this now: if you think you have a slab leak

1. Stay out of standing water near outlets, cords or appliances. The Red Cross warns not to touch electrical equipment if it is wet or if you are standing in water.
2. Shut off the main water valve if water is coming up through the floor.
3. Run the EPA meter test: read the meter, use no water for two hours, and read it again. Movement means a leak.
4. Photograph the damage and call your insurer before repairs start. The Texas Department of Insurance says most policies cover sudden and accidental water damage but not gradual leaks.
5. Call the plumber line and ask what leak detection costs; HomeAdvisor says most pay $150 to $400.

Is it urgent? When a slab leak cannot wait

A slab leak is urgent when water is coming up through the floor, because the EPA says wet materials should be dried within 24 to 48 hours to prevent mold, and HomeAdvisor's 2026 data already puts a typical repair at $630 to $4,400.

• Call now: water on the floor, wet carpet or swelling flooring.
• Same day: a warm spot on the floor or the sound of running water with every fixture off (HomeAdvisor).
• This week: a water bill that jumped, or a meter that moves in the two-hour test with nothing wet.
• Water damage beyond the leak is a separate job; see water damage restoration.

Slab leak detection: cost and how it is found

Slab leak detection costs $150 to $400 for most homeowners in HomeAdvisor's 2026 data, about $280 on average. Fixr says detection uses pressure testing, checking the slab for cracks and moisture, and checking landscaping for excess water, and can take minutes or over an hour. Pinpointing the leak first means the plumber opens the floor once, in the right place. Leak detection covers the tools and other hidden leaks.

You can check for a leak before calling. EPA's WaterSense program says to read the water meter, use no water for two hours, then read it again; if it changed at all, you probably have a leak. EPA says the average household's leaks waste more than 9,300 gallons a year.

Signs of a slab leak

• A warm spot on the floor above a hot water line (HomeGuide, HomeAdvisor).
• The sound of running water when every fixture is off.
• A water bill that jumps with no change in use.
• Sudden changes in water pressure.
• Damp floors, standing water, or mold and mildew under flooring or carpet. Mold remediation lists removal costs; HomeGuide puts it at $1,500 to $6,000 after a slab leak.
• Foundation cracks and warped flooring in later stages (This Old House).

HomeAdvisor lists the causes as poor installation, ground shifts or earthquakes that crack pipes, and mineral corrosion from soil and water; HomeGuide adds corroded metal pipe, heat and pressure stress, and hard or acidic water.

Slab leak reroute vs spot repair

A spot repair opens the slab or tunnels under it to fix the leak in place; a reroute abandons the pipe under the slab and runs a new line through walls or the attic. Fixr prices breaking the slab at $500 to $3,000 and rerouting at $4,000 to $15,000.

HomeAdvisor lists a slab leak reroute at $600 to $4,000 and This Old House rerouting at $1,500 to $15,000; the guides do not agree, so ask for a written price for both options.

• Spot repair fixes one leak in place. HomeAdvisor lists a pinhole leak at $150 to $800 and a single burst pipe at $200 to $3,000.
• A reroute replaces the whole run, so the new line no longer sits in the slab. Ask whether the pipe has leaked before or shows corrosion, and price both options.
• Lining seals the old pipe from inside without opening the floor; HomeAdvisor lists cured-in-place lining at $80 to $250 per foot.
• Leak location matters. HomeGuide says leaks under kitchens or bathrooms cost more to reach.

Does homeowners insurance cover slab leaks

Sometimes, and the guides disagree. HomeAdvisor says most policies cover slab leak repairs tied to a covered event such as an earthquake or severe storm, but often not gradual problems such as corrosion pinhole leaks. Fixr says that in most cases slab leaks are not covered. The Texas Department of Insurance says most homeowner policies cover sudden and accidental water damage but not damage from gradual leaks or seepage, including mold.

Call your insurer before you agree to open the floor, and ask what the policy covers. Photograph the damage and keep the detection report. Do not sign an assignment of benefits or any contract that hands your claim to a contractor. If floors are soaked, water damage restoration covers drying.

Slab leak repair near me: what to ask

• Where exactly is the leak, and how was it found? Ask for the detection report.
• What are the prices for a spot repair, a reroute and lining? Get each in writing.
• Who repairs the floor, and is that in the price? HomeGuide says debris disposal may or may not be included.
• Is a permit needed? HomeGuide lists $30 to $500.
• What is your license number? The plumber hub lists who licenses plumbers in Texas, Florida, Arizona, California, Nevada and Colorado.
• If the main is leaking now, shut it off; emergency plumber covers the first steps.

Local pages: plumber in Houston and plumber in Phoenix. Other costs: home repair costs. Calls go to an independent company that serves your area and takes this kind of job. How calls work.