Slab Leak Repair Cost: Detection, Access & Reroutes
Slab leak repair runs $1,200 – $3,000 to break through the concrete and fix the pipe in place, or $1,500 – $4,500 to reroute the line overhead and skip the jackhammer. Detection comes first at $150 – $600. The pipe fix is rarely the whole bill: jackhammering and flooring restoration are separate line items, and your insurance often pays for the access and tear-out but not the pipe itself.
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| Method | Installed range | When it fits |
|---|---|---|
| Electronic leak detection | $150 – $600 | Pinpoints the leak before anyone breaks concrete |
| Spot repair through the slab | $1,200 – $3,000 | Jackhammer to the leak, fix in place, patch |
| Overhead reroute | $1,500 – $4,500 | Abandon the slab line, run new pipe through walls/attic |
| Epoxy pipe lining | $2,000 – $5,000 | Coats the pipe interior, no demolition |
| Full repipe | $4,000 – $12,000 | The answer when slab leaks keep recurring |
| Item | Range | Note |
|---|---|---|
| Jackhammer & concrete removal | $500 – $1,500 | Opening and re-pouring the slab section |
| Pipe repair or replacement | $400 – $1,000 | The actual plumbing, often the smallest line |
| Flooring restoration | $300 – $3,000 | Tile, hardwood or carpet over the work area |
| Water extraction & drying | $500 – $2,500 | If the leak soaked subfloor or finished space |
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Detection first: $150 – $600 before any concrete moves
No one should break a slab without knowing exactly where the leak is. A detection visit uses acoustic listening gear, pressure testing and sometimes a tracer gas to pinpoint the line under the concrete, and it runs $150 – $600. Many shops credit that fee toward the repair if you hire them, so it rarely stacks on top, and our leak detection cost guide breaks down the acoustic and thermal methods involved.
Detection earns its cost by shrinking the demolition. The difference between guessing and pinpointing is the difference between one neat hole and a trench across your living room. If you are not yet sure the problem is under the slab, our guide to slab leak signs walks the symptoms (a warm spot on the floor, a running meter with everything off, the sound of water with no fixture on) before you pay for detection.
Spot repair vs reroute vs lining: the three paths
Spot repair is the direct route: jackhammer down to the leak, fix or replace that section, patch the concrete, $1,200 – $3,000 plus flooring. It makes sense for a single leak in otherwise sound pipe and when the leak sits in an accessible spot, not under a kitchen island.
Overhead reroute abandons the bad line entirely and runs new pipe up a wall, through the attic and back down, $1,500 – $4,500. It avoids the jackhammer and the flooring claim, which is why many plumbers favor it for leaks in awkward locations or under expensive finishes. Epoxy lining ($2,000 – $5,000) coats the inside of the existing pipe with no demolition at all, well suited to homes with multiple pinhole-prone runs.
When the same slab produces a second or third leak, none of these one-off fixes is the answer. That is the recurrence signal pointing to a whole-house repipe, which retires the slab plumbing for good rather than chasing leaks one hole at a time.
Where the money really goes
On a spot-repair quote, the plumbing is often the smallest number on the page. The pipe fix itself might be $400 – $1,000. The jackhammering and concrete work runs $500 – $1,500, and flooring restoration, matching that discontinued tile or refinishing hardwood, can hit $300 – $3,000 on its own. If the leak ran long enough to soak the subfloor, add water extraction and drying at $500 – $2,500.
This is why reroutes often pencil out competitively despite the higher plumbing labor: skipping the floor demolition and the flooring claim can offset the extra pipe run. When you compare two quotes, line them up by category, plumbing, access, and restoration, rather than by the bottom number alone.
What insurance does and does not cover
Homeowners policies treat slab leaks unevenly. A common structure: the policy pays to access the leak (the tear-out, the jackhammering) and to repair the resulting damage, but excludes the cost of fixing the pipe itself, treating that as wear and tear. So the $500 – $1,500 of concrete work and the flooring restoration may be covered while the $400 – $1,000 pipe repair is on you.
Coverage hinges on the cause and your specific policy language. Sudden, accidental leaks are more often covered than slow, long-running ones the insurer can call neglect. Document everything: photos, the plumber detection report, dates. File before you authorize repairs where you can, and get the adjuster the detection findings so the access scope is on record.
What the repair visit looks like
A spot repair starts with the detection crew marking the floor, then protective sheeting and a saw-cut and jackhammer down to the pipe. The fix takes an hour or two once the line is exposed; the rest of the day is concrete patching. Flooring is usually a separate trade on a later day. Plan for noise, dust containment, and water shut off for part of the day.
A reroute is cleaner inside the slab but opens walls and ceilings where the new pipe runs, so the drywall question returns: confirm whether the quote closes those openings to paint-ready or just patches them. Either way, the plumber pressure-tests the new section and confirms the meter has stopped creeping before closing up.
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