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Leak detection cost (2026)
| Slab leak detection (Angi avg $280) | $150–$400 |
| Pipe leak repair overall (Angi avg $500) | $150–$4,700 |
| Leaking pipes, typical plumber job (Angi) | $175–$550 |
Save money first
Do the free checks yourself before paying for detection: the water meter test and the toilet dye test find the most common leaks. Many cabinet leaks can be traced with paper towels (under-sink leak guide).
What you're paying for
Acoustic, thermal, pressure, and tracer-gas tools pinpoint the leak so the repair opens one small spot instead of several. Ask whether the detection fee is credited if the same company does the repair. How leak detection works.
More related costs
Sources
National figures from published 2026 cost guides. Local prices (especially in high-cost metros such as San Francisco) can be higher. Always get written quotes.