Guide · updated 2026-10-02
What leak detection costs in Southern California
Locating a hidden leak and repairing it are two separate charges. Here are the ranges homeowners in Orange and Los Angeles counties typically see in 2026, and the things that push a job toward the top.
Locating the leak
Most locates take one to three hours. You're paying for the time and the equipment (thermal cameras, ground microphones, tracer-gas kits), which can be expensive for the business to own and maintain.
| Type of locate | Typical range |
|---|---|
| Wall or ceiling supply leak | $200–$600 |
| Slab leak (hot or cold side) | $250–$700 |
| Main/yard service line | $200–$600 |
| Pool or spa | $250–$650 |
| Nights, weekends and holidays | $250–$800 |
Repairing it
Drywall, flooring and concrete finishing are often extra and sometimes handled by other trades. Ask what's included, since some quotes stop at the pipe; others include patching the opening.
| Repair | Typical range |
|---|---|
| Pipe repair inside an opened wall | $300–$1,500 |
| Spot repair through a slab | $1,500–$4,500 |
| Reroute a slab line overhead | $2,000–$6,500 |
| Service line spot repair | $800–$2,500 |
| Service line replacement | $2,500–$6,000 |
| Whole-house repipe | $5,000–$16,000 |
What pushes the price up
- Cold-side slab leaks, which are quieter and slower to find than hot-side ones
- Leaks under tile, hardwood or kitchen cabinets, where access costs more to make and restore
- Multiple leaks at once, or a leak that stops and starts
- Two-storey homes where the pipe runs between floors
- After-hours call-outs
- Permit fees for reroutes, repipes and water heater replacements
What keeps it down
- Doing the meter, toilet and irrigation checks yourself first (see the high water bill checklist)
- Booking a daytime appointment if the leak is slow
- Shutting off the affected side to limit damage while you wait
- Asking for reroute and spot-repair prices side by side for slab leaks, because the cheaper-looking option isn't always cheaper once flooring is counted
Questions to ask before saying yes
- 1
Is the locating fee credited toward the repair?
Some businesses do this when you hire them for the repair; others don't. Either is fine as long as you know up front.
- 2
What exactly is included?
Opening, pipe repair, pressure test afterwards, patching, clean-up, haul-away, permit: ask which are in the price.
- 3
What's your license number?
Plumbing in California requires a C-36 plumbing license for jobs over the state's minor-work threshold. You can check status on the Contractors State License Board website.
- 4
What does your warranty cover, and for how long?
Warranties are set by each plumbing business. Get the terms in writing.
- 5
Will you document it for my insurer?
Photos of the locate, the opened area and the failed pipe help with a water-damage claim.
Does insurance pay for any of this?
Homeowners policies in California commonly pay for sudden water damage and sometimes for tearing out and replacing the floor or wall to get at the pipe. The pipe repair itself, and long-term seepage, are usually excluded. Detection costs are covered under some policies and not others. The only reliable answer is your policy wording, so call your insurer before the repair if you plan to claim.