What a plumber costs to find and fix a leak

For a visible leak you can reach, national guides run about $150 to $550. One buried inside a wall or ceiling commonly costs $500 to $2,000. Slab leaks sit higher, with repairs reported from about $500 to $4,000 and whole-pipe reroutes above that. Finding the leak usually costs $150 to $400 on its own. These figures are guides only, and the plumber's written quote is what counts. If the leak is a burst pipe pouring water right now, start with the page on burst pipes in Santa Ana and shut the water off first.

What is the usual price for a plumber to repair a leak?

A plumber's leak fix usually falls between $150 and $850 depending on the pipe and access, according to published 2026 guides. Pinhole leaks and accessible fittings are at the bottom, a burst or hidden leak at the top. Labor often runs $75 to $150 an hour, and detection or wall repair may be billed separately.

The table breaks it down by where the leak is, which matters more than how much water is escaping.

Numbers from different guides disagree, so treat the middle of each band as the planning figure and the top as the risk. Our page on what a service call costs explains the callout fee that often sits in front of the repair.

Why does leak detection cost extra?

Because finding a hidden leak takes equipment and time before any pipe is touched. A plumber may listen with acoustic sensors, scan with thermal imaging, pressure-test sections of line, or push a camera into a drain. Guides list detection near $150 to $400, and a few businesses subtract it from the repair bill if you hire them to fix it.

A leak you can see needs no detection. Suspicion without proof does: an unexplained water bill, a busy meter, a warm patch underfoot or a damp ceiling stain. Try this: stop every tap, appliance and sprinkler, then stare at the meter's small dial. If it creeps, water is slipping out of the system. The page on high water bill causes walks through that and the other usual suspects.

What does a slab leak or underground leak cost to repair?

Slab leak repairs are among the most expensive in plumbing: guides report $500 up to $4,000 for the repair itself, with averages near $2,300 including detection, and whole-line reroutes or tunneling above that. The leak sits in a pipe beneath the concrete floor, so access, not the pipe, is what you pay for.

Method matters:

• Spot repair through the slab, about $500 to $2,000, where the floor is opened above the leak.
• Reroute above the slab, roughly $1,500 to $4,000, with a fresh line run through walls or the attic.
• Tunneling under the slab, higher again.
• Epoxy lining or repiping, which costs more but addresses multiple weak points.

Many Santa Ana homes built after the war sit on concrete slabs, and older copper lines under them can develop pinholes, so slab leaks are a real local possibility. Read slab leak repair or repipe to weigh repairing a single leak against replacing the lines, and slab leak repair specialist for what the work involves.

Outside lines cost less to reach in most yards, but trenching through paving, roots or a driveway adds to the bill. Guides list water line leaks at about $190 to $1,500. Who owns the line matters. As a rule the owner covers the pipe running from the meter into the house and the water provider covers the street side, so a short call to the provider before hiring can save money.

What makes a leak repair cost more?

Access, pipe material, how much the leak has damaged, the hour of the call and any permit the city wants. A leak above a finished ceiling means opening and later patching drywall. Evening and weekend calls typically add $200 to $500 in the guides. Water damage cleanup and drying are separate from the plumbing bill.

Other drivers include the number of leaks found, corroded neighboring pipe that fails once disturbed, and the need to replace a long section instead of a single joint. A homeowner who sees one pinhole in old copper may find more, which is why some plumbers quote both a spot repair and a repipe so you can compare. For pinholes see pinhole leak copper pipe repair, and for a pipe that has already split, burst pipe repair cost.

Gas is a different matter entirely, and a gas smell is not something to diagnose. Exit first. From outside, reach SoCalGas on 1-800-427-2200, and place a 911 call when someone could be hurt. Gas piping repair is contractor-only work in California.

Can I find a plumber's leak price for a car, or an outdoor tap?

This page covers home plumbing. A car leak, such as coolant, oil or fuel, is a mechanic's job and is priced very differently, so the figures here do not apply. An outdoor faucet or hose bib leak sits at the cheap end of the table, often fixed in a single visit for a replacement washer or valve.

If the leak is at a faucet, see the guide to fixing a leaky outdoor faucet. You can also hold the bill down: close the main valve, photograph the damage for insurance, move valuables and clear a path to the spot before the plumber turns up.

How do I get a fair quote?

Have the price written down before anything starts, with detection, repair, wall patching and any permit on separate lines. Judge two quotes only if they cover identical work. Search the contractor on the state license board's site; California makes the license compulsory at $1,000 and up, and for anything needing a permit.

Find out whether the quote assumes the leak is where the plumber expects. Hidden leaks sometimes turn out bigger once opened, and a good quote says how the price changes if so. Calls are answered weekdays from 9am to 5pm, and the price request page is where you describe the leak and start the process. For everything else we cover, go to the Santa Ana Plumbing Co home page.

Common questions

What does it cost to detect a hidden water leak?

Published 2026 guides place detection between $150 and $400, with slab leak detection averaging about $280. The method matters, whether acoustic listening, thermal imaging or a drain camera, and so does the area searched. A few companies credit the fee against the repair.

Why do slab leaks cost so much more than other leaks?

The pipe is under concrete, so the job means breaking the floor, tunneling or running new pipe overhead. Reported repair prices span $500 to $4,000, with reroutes and tunneling beyond, and flooring removal, drying and patching on top. Labor and access, rather than metal, drive the price.

Whose bill is a leak in the outdoor water line?

Typically yours, from the meter through to the house, with the provider handling the street main and its own side of the meter. Confirm where the boundary sits before you spend anything. Home insurance may cover some resulting damage, though often not the pipe repair itself.

How long is a leak repair likely to take?

A fitting in plain sight is often mended within an hour or two. A leak inside a wall can eat half a day once access and patching are counted. Slab leaks commonly need one to three days, more if flooring comes up. Request a time estimate alongside the price.

Is a permit part of fixing a leak?

A minor repair to an existing pipe often does not, but replacing sections of pipe, moving lines or touching gas or the water heater generally does. Rules vary by city, and Santa Ana's Building and Safety division sets its own. The contractor on the job normally files it.