How much does it cost to fix a slab leak in Los Angeles, CA?

Slab leak repair in Los Angeles, CA typically costs $1,500–$4,000 for a spot repair after detection, with leak detection itself running $150–$400. A full repipe to bypass the slab runs $4,000–$12,000. Detection matters more than repair price: a company that pinpoints the leak electronically cuts a small hole; one that guesses cuts several.

Likely causes

• Copper pipe corrosion — The classic slab leak — pinhole leaks in copper lines under the foundation, common in homes 20+ years old.
• Shifting soil / foundation movement — Movement stresses rigid pipe until a joint or line cracks.
• High water pressure — Sustained pressure above ~80 psi accelerates wear on every fitting in the house.

What you can check yourself

• Confirm it's real: watch the water meter with everything off — if the dial moves, water is going somewhere.
• Check the obvious first: running toilets and irrigation leaks mimic slab leaks and cost far less.
• Call your insurer early — slab leak *damage* is often covered even when the pipe repair isn't.

Typical cost

Typical in Los Angeles, CA: detection $150–$400; spot repair $1,500–$4,000; repipe $4,000–$12,000. Get the detection report in writing before authorizing demolition.

When to call a pro

Warm spots on the floor, the sound of running water with everything off, or a sudden water-bill spike — book detection now; slab leaks erode the soil under your foundation.

Plumber pros in Los Angeles, CA

• One Star Inc · 742 S Hill St Ste 310, Los Angeles, CA · 12136221055
• Bill & Sons plumbing · 334 Main St, Los Angeles, CA · +12136423800
• Precision Emergency Plumber Los Angeles · 412 Colyton St, Los Angeles, CA · +12134516567
• Mr. Marcus Plumbing · 351 E Temple St, Los Angeles, CA 90012, United States, Los Angeles, CA · +13233287922
• Ok Plumbing, Inc. · 720 E 2nd St, Los Angeles, CA · 12136266211
• DL Plumbing · 1254 W 6th St # 700, Los Angeles, CA · (888) 487-3969
• Prime Leak Detection · 601 S Figueroa St # 4050, Los Angeles, CA · 18883401380
• Sun Trim · 2011 S Santa Fe Ave, Los Angeles, CA · 12136225066

Get free quotes from Los Angeles, CA pros →

Data by Servik — verified local pros from official license records and public sources. Cost figures are typical ranges, not quotes; a pro's written estimate is the real number.