How Much Does Slab Leak Repair Cost in Los Angeles?
Most slab leak repairs cost $630 to $4,400, including finding the leak. The national average is about $2,300, and LA jobs usually land toward the higher end because labor costs more here. The final price depends mostly on where the leak is and what's built on top of it.
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Cost by type of repair
Leak detection (finding it)
$150 to $400
Pinhole leak repair
$150 to $800
Pipe leak repair through the slab
$250 to $850
Reroute the line around the slab
$600 to $4,000
Drain line leak under the slab
$800 to $5,000
Pipe lining (no digging)
$80 to $250 per foot
| Repair | Typical cost |
|---|---|
| Leak detection (finding it) | $150 to $400 |
| Pinhole leak repair | $150 to $800 |
| Pipe leak repair through the slab | $250 to $850 |
| Reroute the line around the slab | $600 to $4,000 |
| Drain line leak under the slab | $800 to $5,000 |
| Pipe lining (no digging) | $80 to $250 per foot |
Costs people forget to budget for
- Patching the concrete. Usually a few hundred dollars, more if several access holes are needed.
- Floors and cabinets. A leak under a utility closet is cheap to restore. A leak under hardwood or kitchen cabinets can cost thousands to rebuild.
- Water damage and mold. The longer a leak runs, the more drying, subfloor and drywall work you'll need.
- Permits. Often $75 to $200.
Signs you might have a slab leak
- Water bill jumps with no change in use
- A warm spot on the floor (hot water line leak)
- Sound of running water when everything is off
- Damp carpet, warped flooring or new cracks
- Water meter moving with all fixtures off
Many San Fernando Valley homes sit on concrete slabs with older copper lines, which is why slab leaks are common here.
Repair, reroute or repipe?
One leak in an otherwise good line is usually spot-repaired. If the line runs under finished floors, a reroute through walls or the attic is often cheaper than breaking the slab. If you've had two or more slab leaks, ask about repiping the house instead of paying for leak after leak.
Frequently asked questions
Does homeowners insurance cover slab leaks?
It often covers the damage to your home, and sometimes the cost of reaching the pipe. It usually does not cover the pipe repair itself. Call your insurer before work starts.
How long does a repair take?
An easy-to-reach leak can be fixed in a few hours. Leaks under finished areas can take days, plus time to rebuild floors.
Can I wait?
No. Water under the slab keeps damaging soil, floors and the foundation every day it runs.
Get a free slab leak quote from a local plumber
Tell us what you need. Vetted plumbers in your area will reach out, usually the same day. No cost, no obligation.
Prices reflect Los Angeles area averages as of 2026. Actual costs vary by project.