A slab leak is a broken water line under the concrete your house sits on. You cannot see it, you usually cannot hear it, and the first clue is often a warm spot on the floor or a water bill that makes no sense.
Almost every house in this valley sits on a slab, so this is very much a local problem.
The short version:
- Detection starts at $258. That tells you whether you have one at all, and it is by far the cheapest step.
- Slab repair is $9,485. A reroute is $4,532. The reroute is usually the better call.
- Pool line replacement is $14,177. Plenty of pools here, so this comes up.
- No basements because of caliche, which is exactly why the pipe is in the concrete.
- The meter test is free. Everything off, watch the dial.
A quick glossary
- Slab leak
- A leak in a water line running inside or under your concrete slab. Hot side leaks are more common than cold.
- Slab-on-grade
- A house poured straight onto concrete, no basement, no crawlspace. Standard around here.
- Isolation test
- Shutting off sections one at a time until the loss stops. Cheap, quick, and it settles the question. $258.
- Access and cap
- Opening up to reach a line and capping it, usually while locating or abandoning a run. $1,351.
- Reroute
- Leaving the bad line in the slab and running a new one overhead through the attic and down the walls. No concrete gets broken.
- Spot repair
- Breaking the slab at the leak, fixing the pipe, pouring it back.
- Post-tension slab
- A slab held together with steel cables under tension. Cutting one without scanning first is genuinely dangerous.
- Acoustic and thermal location
- Listening for escaping water and reading heat through the floor to pinpoint the leak before anything gets cut.
What leak work costs here
| Service | Typical price in Las Vegas |
|---|---|
| Leak detection, isolation test | $258 |
| Leak detection, access and cap | $1,351 |
| Water leak repair (level 1 to 3) | $254 to $4,843 |
| Slab leak repair | $9,485 |
| Re-route, single line | $4,532 |
| Pool line replacement | $14,177 |
| Sump pump installation | $4,538 to $6,771 |
Prices are typical ranges for work in the Las Vegas valley. Final pricing depends on home size, access, materials and site conditions. All prices include professional installation and a 1-year workmanship warranty unless otherwise noted. Prices shown reflect a 10% buffer above base pricing. Customer-provided item pricing reflects installation labor only. Emergency and after-hours rates may apply.
Look at the top two rows first. Detection decides everything after it, and at $258 it is the only part of this list most people should commit to before they know more.
Two numbers that look wrong
| National | Las Vegas | |
|---|---|---|
| Leak detection | $150 to $1,000, average near $600 | $258 isolation test |
| Slab leak repair | $630 to $4,400, average near $2,280 | $9,485 |
| Reroute one line | $4,800 to $14,500, average near $8,200 | $4,532 |
| General leak repair | Varies a lot | $254 to $4,843 |
Two of those rows look like they contradict each other, and explaining why is probably the most useful thing on this page.
Our slab repair sits above the national average. Our reroute sits well below it. That is a preference showing up in the price book. Scanning a post-tension slab, cutting it, fixing the pipe, pouring it back and replacing your flooring is a serious job and we price it like one. Rerouting overhead skips the slab entirely. When a reroute will work, it is cheaper and far less disruptive, and the gap between $4,532 and $9,485 is why we will suggest it first.
Why this is a Vegas specialty
No basements, so pipe lives in concrete
Caliche is cemented desert soil with the manners of weak concrete. It is the main reason nobody here builds basements. No basement means no crawlspace, so the lines feeding the far side of your house usually run through the slab instead of under a floor somebody can crawl beneath.
Hard water and hot lines
Valley water runs about 16 grains. Heat plus scale is rough on copper, and that is why slab leaks turn up on the hot side more often than the cold. Same thing that shortens water heater life here, working on a pipe you cannot see.
Pressure
The district runs 30 to 100 psi depending on elevation, and over 80 psi you need a pressure reducing valve. A house running high without a working one is leaning on every joint in that slab. Checking pressure after a slab leak is not an upsell. It is asking why the pipe gave out. Our pressure guide has the two minute test.
Pools
Pool plumbing is buried, pressurized, and often older than the equipment bolted to it. At $14,177, a pool line is the biggest number in this chapter, and it usually shows up as a pool dropping faster than evaporation explains.
How to tell you have one
| What you notice | Slab leak? | Or maybe |
|---|---|---|
| Warm patch on the floor | Very likely | Not much else does this |
| Running water sound, everything off | Yes | A running toilet, which is far cheaper |
| Bill up, habits unchanged | Yes | Irrigation or a toilet flapper |
| Meter dial turning with everything off | Yes. The decider | Nothing innocent |
| Cracked flooring or damp carpet edges | Yes, later on | Foundation movement |
| Low hot pressure only | Possibly | The water heater or a hot angle stop |
Do the meter test first. Shut off every fixture, the ice maker and the irrigation timer, then watch the low-flow dial. If it moves, water is leaving. Costs nothing, turns worry into fact.
Repair, reroute, or repipe?
| Spot repair | Reroute | Repipe | |
|---|---|---|---|
| Price | $9,485 | $4,532 per line | $11,000 and up |
| Breaks concrete | Yes | No | No |
| Right when | Leak is reachable and the rest of the pipe is fine | One line failed, others are healthy | Several have failed, or it is polybutylene |
| Mess | Flooring | Walls and ceilings | Walls and ceilings |
Here is the bit people miss. A second slab leak in the same house changes the math completely. One failed line is a reroute. Two in two years is a pipe at the end of its life, and at that point the repipe conversation is the cheaper one.
What the week looks like
| Stage | How long |
|---|---|
| Meter test | Minutes |
| Isolation test | 1 to 2 hours |
| Pinpointing the leak | 1 to 3 hours |
| Reroute one line | 1 to 2 days |
| Spot repair through the slab | 2 to 4 days |
| Flooring afterward | Separate, varies |
What about insurance?
Policies vary, so call and ask instead of assuming. Broadly, insurers are more likely to help with the damage the water did than with the pipe and the digging to reach it, and gradual wear is a common exclusion. Document everything from that first meter reading, and ask specifically about access and restoration.
Frequently Asked Questions
How much does slab leak detection cost in Las Vegas?
An isolation test is $258 and it is the right first move. If a line has to be opened and capped while locating the leak, that is $1,351. Detection is deliberately the cheap part, because it makes everything after it accurate.
How much to fix a slab leak?
Repair through the slab is $9,485. Rerouting the line overhead instead is $4,532, and when it works it is cheaper and far less disruptive. Which one applies comes down to where the leak is and what sits above it.
What are the signs?
A warm patch on the floor, running water with everything off, a bill that climbed for no reason, damp carpet edges, or a meter dial that turns when nothing is on. The meter test is free and settles it.
Why are slab leaks so common here?
Because nearly every house sits on a slab. Caliche makes basements impractical, so water lines run through concrete instead of under a floor you can reach. Add 16 grain water and pressure that often runs past 80 psi, and hot lines in particular give out early.
Is a reroute better than breaking the slab?
Usually, when it is possible. It avoids cutting a post-tension slab, it avoids wrecking your floor, and here it costs about half. Whether it works comes down to where the line needs to travel.
Will insurance cover it?
Often partly, rarely all. Policies tend to cover resulting damage more readily than the pipe and the access to reach it, and gradual failure is commonly excluded. Ask your carrier about access and restoration specifically.
Can I leave a small one for now?
We would rather you did not. It runs around the clock under your foundation, it is on your bill every day, and the damage to flooring and the slab surround adds up. A leak that is cheap to reroute today will not be cheaper later.
What about a pool leak?
Pool line replacement is $14,177. The usual first sign is the pool dropping faster than evaporation explains, and the first step is still detection rather than a quote.
Start with the cheap test
Order matters more here than almost anywhere else on this site. Meter test, isolation test, pinpoint, then choose between reroute and repair. Jumping straight to a quote is how people pay $9,485 for something a $4,532 reroute would have handled.
Have a look at our leak detection service, or book a visit and we will start with the cheap test, not the expensive one.
