Repairing a broken pipe under a house typically costs $500-$4,000, with an average near $2,000 for a localized leak in an accessible crawlspace. The broken pipe under house cost rises when the line is beneath a concrete slab, access is restricted, or damaged piping needs replacement over a long distance.
Quotes depend on pipe material, leak location, water damage, local labor rates, and whether the plumber repairs the pipe or reroutes it.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Accessible crawlspace repair | $500 | $1,500 | $3,500 | Localized repair with ordinary access |
| Pipe repair beneath slab | $1,500 | $4,500 | $10,000+ | May involve concrete cutting or rerouting |
| Full or extensive replacement | $3,000 | $8,000 | $20,000+ | Price depends on pipe length and access |
| Typical plumber rate | $75/hour | $125/hour | $200/hour | Emergency visits may cost more |
What a crawlspace pipe repair usually costs
A plumber may charge $500-$1,500 to locate and repair a small leak in an open, dry crawlspace. A longer damaged run, corroded fittings, or a cramped crawlspace can bring a standard repair to $1,500-$4,000. These estimates assume residential supply piping, routine weekday service, and no major structural or water-damage work.
For a reachable, localized leak, budget about $1,500; difficult access or pipe replacement can push the total well above $3,500. PEX repairs are often less expensive than replacing a comparable copper run, although fittings, labor, and code requirements affect the final quote.
How pipe, labor, and access shape the quote
Repair quotes commonly combine diagnosis, materials, labor, and any access or cleanup work. The table shows typical ranges for a single residential job; charges may overlap when a contractor bundles tasks.
| Quote component | Typical price | What changes the charge |
|---|---|---|
| Leak diagnosis | $100-$500 | Basic inspection versus specialized leak detection |
| Pipe and fittings | $25-$300 | PEX, copper, diameter, and repair length |
| Plumbing labor | $300-$1,500 | Hours required and local hourly rate |
| Access and excavation | $200-$3,000 | Crawlspace conditions, concrete cutting, or digging |
| Water removal or disposal | $150-$2,000 | Standing water, damaged insulation, or debris |
Labor is often the largest variable, especially when the pipe cannot be reached without excavation or demolition. Drywall, flooring, concrete restoration, and mold remediation may be separate charges rather than part of the plumbing quote.
Why pipe length and crawlspace clearance change the price
For an accessible supply line, a short repair of 1-3 feet may require only a few labor hours. Replacing 10-20 feet of pipe can add material and labor, particularly if the plumber must support the line, work around joists, or open multiple access points. Tight clearance under 18 inches or standing water can require extra setup, protective equipment, or water removal.
Ask whether the estimate covers only the failed joint or the full visibly deteriorated run. A single pinhole in otherwise sound piping may call for a patch; multiple leaks or widespread corrosion can make a longer replacement more practical. A quote should identify the pipe material and approximate length being replaced.
When slab access makes repair or rerouting more expensive
A pipe beneath a concrete slab may cost $1,500-$5,000 to expose and repair when the break is localized and the route is straightforward. Cutting and restoring concrete or flooring can raise the total to $3,000-$10,000 or more. Rerouting a line around the slab commonly costs $2,000-$8,000, depending on distance, wall access, and finish repairs.
Compare the complete repair and restoration cost with a reroute, not just the plumbing labor. A reroute can avoid repeated slab openings, but it may involve longer pipe runs and patching walls or ceilings. Ask whether the proposal includes concrete, flooring, and debris removal.
How long plumbers may need under the house
A straightforward crawlspace repair may take 2-5 labor hours, while a difficult repair or replacement run can take most of a day or longer. Slab leak detection, excavation, and restoration may require separate visits or different trades. Emergency or after-hours work can add a dispatch charge or a higher hourly rate.
Confirm the quote’s included labor hours and the rate for additional time. If the plumber needs a helper, a second technician, or a specialized leak-detection service, the estimate should state those charges rather than leaving them as an open-ended extra.
Three realistic quotes for common under-house leaks
These examples illustrate how access and scope affect totals; local quotes can differ. They exclude major mold remediation and extensive finish replacement.
| Job example | Scope and labor | Estimated total |
|---|---|---|
| Small crawlspace leak | 2-3 hours; 2 feet of PEX and fittings | $650-$1,300 |
| Copper run replacement | 6-9 hours; 12 feet, restricted crawlspace | $1,800-$3,800 |
| Slab leak with reroute | 8-14 hours; new route plus basic wall patch | $3,500-$8,500 |
Check that competing bids describe the same pipe length, access work, and restoration. An apparently cheaper quote may exclude leak detection, disposal, or patching.
How U.S. labor markets shift under-house repair prices
Prices in high-cost metro areas can run roughly 15%-35% above national midrange estimates, while some rural markets may come in 5%-20% lower. Differences reflect contractor availability, travel distance, wage levels, and permit or inspection requirements. These percentages are broad comparisons, not guaranteed local adjustments.
Compare local written estimates rather than applying a national average as a firm quote. For a major replacement or slab reroute, two or three itemized bids can reveal whether one contractor has included restoration, materials, and cleanup that others omitted.
Which choices can lower the plumbing bill
Stopping water promptly can limit damage and reduce drying or cleanup costs. Clear the crawlspace entrance and remove stored items if it is safe to do so; do not enter a flooded or unsafe space. Ask whether a short repair is suitable or whether the plumber sees multiple failing sections that justify replacing a longer run.
Control scope by requesting separate prices for pipe repair, rerouting, and restoration. Choose standard code-compliant materials unless a specific condition warrants an upgrade, and schedule non-emergency work during regular hours when possible. Verify that each bid states the warranty, permit responsibility, cleanup, and any extra-hour rate before approving the work.