Replacing pipes under a house typically costs $2,000-$15,000, with many accessible crawlspace jobs averaging about $7,000. Pipe material, the length of the run, access beneath the home, and whether the work involves a slab or a full repipe have the biggest effect on the quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Accessible crawlspace pipe replacement | $2,000 | $7,000 | $15,000 | Localized or multi-line replacement |
| Full-home repipe with under-house lines | $4,000 | $9,000 | $20,000 | Depends on home size and access |
| Slab leak reroute or replacement | $5,000 | $12,000 | $25,000 | May include concrete work and restoration |
| Pipe replacement rate | $4 | $10 | $25 | Per linear foot for pipe and installation |
Typical prices for crawlspace pipe replacement
Replacing a short, accessible section may cost $2,000-$4,000, while replacing several water lines beneath a typical 1,500- to 2,000-square-foot home often runs $5,000-$10,000. A full repipe with difficult access, extensive branch lines, or higher-cost materials can reach $15,000 or more. Prices vary by region and whether wall openings or restoration are included.
A straightforward crawlspace job is usually far less expensive than opening and repairing a concrete slab. The ranges assume standard residential plumbing, normal access, and no major structural repairs. Assumptions: typical U.S. home, licensed plumbing contractor, standard pipe materials, ordinary access.
What pipe, labor, and access add to the quote
Quotes commonly combine pipe and fittings, plumber labor, and charges for access or disposal. Labor is a major share when a crew must work in a low, damp, or obstructed crawlspace. Ask whether the price covers testing, permits, insulation, and patching; these may be separate line items.
| Quote component | Low | Average | High |
|---|---|---|---|
| Pipe and fittings | $500 | $1,500 | $3,500 |
| Plumbing labor | $1,200 | $4,000 | $8,000 |
| Access, setup, and disposal | $200 | $800 | $2,000 |
| Permit and inspection | $50 | $300 | $800 |
| Insulation or restoration | $100 | $500 | $2,000 |
Labor, access, and restoration can change the total as much as the pipe material. Typical plumber rates are about $75-$150 per hour, though contractors often quote the whole project rather than hourly work.
How crawlspace height and pipe length change the price
A crawlspace with at least 24-30 inches of working clearance is generally easier to service than one under 18 inches, where movement and tool use are restricted. Standing water, debris, pests, or a damaged vapor barrier can add preparation charges. A 50-foot replacement run may be a modest repair; replacing 200 feet of supply and branch lines can require substantially more material and labor.
Pipe choice also matters. PEX is flexible and often costs less to install, while copper may carry a higher material and labor price. Drain and sewer lines use different pipe sizes and installation methods than pressurized water lines, so estimates for those projects should not be compared directly.
Confirm whether the estimate covers only water supply lines or also drain, sewer, and fixture connections. Changing pipe type or route can affect fittings, permits, and labor.
How many days plumbers need beneath the house
A localized repair may take 4-8 hours, while replacing multiple lines commonly takes 1-3 working days. A whole-home repipe can take 2-5 days, particularly if workers need access through walls or must coordinate inspections. These are on-site estimates; scheduling, drying, and restoration may extend the calendar time.
For a difficult job, ask how many workers will be on site, what areas of the home will lose water, and whether water service is restored each evening. Labor estimates are more useful when the quote states the crew size and expected workdays.
Slab rerouting compared with crawlspace replacement
When pipes run beneath a concrete slab, plumbers may replace a damaged section by tunneling, cutting concrete, or rerouting the line through walls or overhead spaces. A reroute commonly costs $5,000-$15,000; extensive slab cutting and concrete repair can push a project above $20,000. The right method depends on leak location, pipe condition, and the home’s layout.
Get estimates for both direct repair and rerouting when each is technically feasible. A lower initial repair may not make sense if nearby lines are also deteriorated, while a whole-system replacement may be unnecessary when one isolated section has failed.
Regional plumbing quotes and local price differences
Urban markets with higher labor and permit costs may quote 15%-30% above national midrange figures. Rural areas can be 5%-20% lower, but travel charges or limited contractor availability can erase that difference. Cold-climate homes may also need more insulation or freeze protection, adding roughly $200-$1,000 depending on the length and condition of exposed lines.
Compare local written estimates with the same pipe length, material, access assumptions, and restoration scope. A quote far below others may omit permits, insulation, or cleanup rather than represent a true equivalent price.
Extra charges for water, sewer, and crawlspace problems
Common additions include leak detection at $150-$500, crawlspace cleanup at $500-$3,000, and water-damaged insulation replacement at $300-$1,500. Moving a water heater or adding new shutoff valves can add $150-$800 per item. Emergency or after-hours service may carry a $150-$500 dispatch fee, separate from repair labor.
Permits typically cost $50-$800, depending on location and project scope. Sewer-line replacement, structural repairs, or mold remediation may require separate contractors. Ask the plumber to identify exclusions and price likely add-ons before work begins.
Ways to lower the under-house repiping bill
Provide clear access by removing stored items and arranging safe entry where possible, but leave plumbing work to a licensed professional. Request two or three itemized bids and compare pipe type, footage, labor, permits, testing, and cleanup. Bundling nearby failing lines can cost less than paying for repeated mobilization, but a contractor should document why each line needs replacement.
Choose a suitable standard material rather than paying extra for upgrades without a clear benefit, and schedule non-emergency work during normal business hours. Keeping the scope focused and comparing equivalent written bids are the most reliable ways to control the final price.