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Slab leak repair cost (2026)
| National average incl. detection (Angi) | $2,280 |
| Typical range (Angi) | $630–$4,400 |
| Detection alone (Angi avg $280) | $150–$400 |
| Permits (Angi) | $150–$200 |
Cost drivers
- Location: under a utility area is cheap, under kitchen cabinets or finished floors is expensive.
- Method: direct access through the slab, rerouting the line through walls or ceilings, or pipe lining.
- Build-back of flooring and finishes, which is often billed separately.
Warning signs include warm spots on the floor, the sound of running water, and an unexplained bill increase. 10 signs of a hidden leak.
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.