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Slab leaks · Berkeley, CA
Slab Leak Repair in Berkeley, CA
A warm spot on the floor, a meter that keeps spinning or water you can hear but not see. Here are the signs, what to do first, and how spot repair compares with a reroute.
A slab leak is a water line leaking under a concrete floor. Many older Berkeley homes sit on raised foundations, so true slab leaks are less common here, but they do happen in slab-floor homes, later additions and converted garages. The usual fix is either a spot repair through the concrete or a reroute that abandons the leaking pipe and runs a new one through walls or the attic.
Signs of a slab leak
- A warm spot on the floor. A leaking hot line heats the concrete above it.
- Your EBMUD meter moves with everything off. Use the meter test on our leak detection page.
- The sound of running water when no tap, toilet or appliance is on.
- Damp carpet, swelling wood floors or new cracks in tile or flooring.
- A water heater that runs all the time, because it keeps refilling with cold water to replace what leaks out.
- A water bill that jumps with no change in how you use water.
What to do right away
- Confirm with the meter. Turn off all water and watch the leak indicator.
- If you feel a warm spot, close the cold supply valve at the top of the water heater to slow a hot-side leak.
- If water is coming up through the floor, shut the main valve. See how to shut off your main water valve.
- Photograph the damage and call your insurer before major demolition if you plan to file a claim.
Repair options
| Option | How it works | Reported cost |
|---|---|---|
| Spot repair | Open the slab at the leak, fix the pipe, patch the concrete and flooring | Part of the $630 to $4,400 typical range |
| Reroute | Abandon the leaking line and run new pipe through walls, ceilings or the attic | $600 to $4,000 |
| Repipe | Replace all supply lines when the old pipe keeps failing in several places | See our repiping page |
National figures from HomeAdvisor, updated June 2026: average slab leak repair $2,280, typical range $630 to $4,400, reroute $600 to $4,000, and $150 to $400 to pinpoint the leak. Bay Area labor usually costs more. Flooring and concrete restoration may be separate.
Spot repair or reroute?
A spot repair makes sense when the pipe is in good shape apart from one failure and the leak sits in an easy spot, such as under tile you can replace. A reroute often wins when the leak is under finished hardwood, under a cabinet run, or when the pipe is old enough that a second leak is likely. One leak in old pipe is often the first of several. Ask the plumber to explain both options, in writing, with the flooring work included.
Will insurance pay?
It depends on your policy. HomeAdvisor reports that most policies cover slab leak repairs tied to a covered event, such as an earthquake, but often won’t cover gradual problems like corrosion pinholes. Many policies treat access and water damage differently from the pipe repair itself. Read your policy or call your carrier before you approve demolition.
Before anyone breaks concrete: ask how the leak was located, and get the reading or a photo. A pinpointed leak keeps the opening small.
Keep reading
Common questions
What is a slab leak?
A leak in a water line that runs under a concrete floor slab. It is usually found by a warm spot on the floor, a moving water meter or the sound of running water.
How much does slab leak repair cost?
HomeAdvisor reports an average of $2,280 and a typical range of $630 to $4,400 nationally (June 2026). A reroute runs $600 to $4,000. Bay Area prices usually run higher.
Is it better to reroute or repair a slab leak?
Spot repair suits one failure in otherwise sound pipe. A reroute often makes more sense under finished floors or when the pipe is old enough that more leaks are likely.
Does homeowners insurance cover slab leaks?
It depends on the policy. Coverage is more likely for damage tied to a covered event and less likely for gradual corrosion. Check with your carrier before demolition.
Think you have a slab leak?
Call and you will be connected with an independent, licensed plumber who can confirm it and explain spot repair and reroute options in writing.