Slab homes across the valleyBreak through or reroutePublished market ranges, sourced
A slab leak is a break in a pressurized line running under the concrete floor of the house. Las Vegas builds on slabs rather than basements, largely because caliche under the soil is about as hard as concrete.
Figures above are published third party data, not company claims. Sources: HomeAdvisor cost guides, US Census ACS, LVVWD Water Quality Summary, InterNACHI.
A slab leak is a leak in a water line under the concrete floor. In Las Vegas that describes most homes, since the valley builds on slabs instead of basements. Repair means either opening the concrete at the marked spot or rerouting the line around the slab. Published ranges run $630 to $4,400.
This page covers slab leak repair across the Las Vegas Valley. If you are not sure this is the right service, start from All plumbing services.
A slab leak shows up through the floor before it shows up as standing water. Heat and moisture move through concrete slowly, so the first clue is usually something underfoot.
Hot water lines fail more often than cold ones, because heat and pressure work on the pipe together. That is why a warm floor is the classic sign in valley homes.
The water is coming up through the floor or heating it from below, not running down a wall. Nothing you shut off makes it stop. If a plumber has already pointed at the slab, or the warm spot appears when the water heater runs, this is your page.
This page is about a leak under the concrete, once the location is known. If nobody has found it yet, start with leak detection across Clark County. A wet patch in the yard between the meter and the house is water Line Repair in Las Vegas instead. A leak in an exposed line under a sink or inside a wall belongs with pipe repair.
Two routes reach the same result, and the house decides which one makes sense. The choice comes down to access, the age of the pipe and how many times the line has already failed.
| What is included | What that means |
|---|---|
| Pinpointing through the slab | Listening equipment and surface temperature readings mark a small target so the opening in the concrete stays as small as possible. |
| Opening and closing the concrete | The floor is cut, the failed section is replaced, then the concrete is patched back to grade with flooring handled separately. |
| Rerouting the line | Instead of breaking the floor, a new run is taken overhead or through walls, which abandons the failed line in place. |
| Repair of the failed section | When one fitting or one short run has failed and the rest of the system is sound, replacing that section is the smaller job. |
| Partial or whole home repipe | When the same line has failed more than once, replacing the run end to end is usually the cheaper path. That comparison runs over the life of the house, not over one invoice. |
| Written scope before the first cut | You get the route, what gets opened, what gets patched and what is excluded, such as matching the flooring afterward. |
Four ways this page tries to keep the choice between concrete and reroute checkable.
Each stage ends in a decision you make, not one made for you.
You describe the warm spot and when it started. The plumber isolates hot and cold, reads the meter and confirms the leak is below the floor rather than in a wall.
Before anything is openedYou decide between opening the concrete and rerouting overhead. The plumber gives the access, the disruption and the published range for each route.
Once the location is markedYou clear furniture and pick a room to keep sealed off. The plumber sets containment, cuts the marked area and exposes the failed line.
Start of the repairYou confirm the water is back on and the pressure holds. The plumber replaces the section, pressure tests it and patches the concrete back to grade.
Once the floor is openYou get a plain list of what is left for someone else, usually flooring, tile matching and any drywall texture work.
Before the work is signed offThe price is final when you sign off on the chosen route, and anything found inside the floor is repriced and approved before work continues.
Slab work carries two published ranges rather than one, because detection and repair are priced separately. Both come from HomeAdvisor, and both are market figures rather than a quote for your floor.
Slab work varies more than almost any other plumbing job, because depth, access and flooring type change everything. Treat the ranges as a starting picture rather than a promise.
A plumber comes out, confirms the leak is under the slab and marks it. That visit is where you get the route options, because until the location is known, nobody can honestly price the opening.
The written price covers the route you pick, the opening, the repair and the patch. It is agreed before the first cut. If the pipe below turns out worse than the readings suggested, you approve the revision before work goes on.
| Job | Typical Las Vegas range | What moves the number |
|---|---|---|
| Slab leak repair | $630 to $4,400 | National average about $2,280. Rerouting the line around the slab instead of breaking it runs about $600 to $4,000. |
| Slab leak detection | $150 to $400 | Pinpointing the leak from above the slab, before any concrete is opened. |
| Whole home repipe, PEX | $4,000 to $10,000 | Las Vegas contractors commonly publish $4,500 to $8,000 for 1,500 to 2,000 square feet, rising with the size of the house. |
| Service call or diagnostic fee | $75 to $150 | The broader trade range runs about $50 to $200. Emergency and after hours dispatch is higher, commonly $150 to $350 or more. |
Every figure in this table is a published Las Vegas or national market range from the source named beside it. It is not a quote and it is not this company's price list. Your number comes from the on site estimate. Sources: <a href="https://www.homeadvisor.com/cost/plumbing/" rel="nofollow noopener" target="_blank">HomeAdvisor cost guides, 2026</a>, <a href="https://www.angi.com/articles/how-much-does-repiping-house-cost.htm" rel="nofollow noopener" target="_blank">Angi cost guides, 2026</a>, <a href="https://www.housecallpro.com/resources/marketing/how-to/how-to-price-plumbing-jobs/" rel="nofollow noopener" target="_blank">Housecall Pro 2026 Plumbing Price Guide</a>.
One failed section in a sound copper system is worth repairing, while a second failure on that same line points toward a repipe.
Published guides put a plumbing service call or diagnostic fee at about $75 to $150, with the broader trade range running $50 to $200. Slab leak detection is listed separately at $150 to $400, because it takes equipment and time a standard call does not include.
On a slab job the detection fee is charged before anyone knows what the repair costs. Whether it is credited back has not been confirmed for publication, so this page does not say. Put the question to whoever quotes the work.
Ranges last reviewed September 2026.
The pictures here show the conditions this page describes. They are illustrations of what a slab leak does, drawn to make the mechanism visible.
Water under a slab travels along the path of least resistance before it reaches an edge. By the time a floor stain appears, the break often sits several feet away. That gap is exactly why pinpointing comes before cutting.
Las Vegas water is published at 280 parts per million as calcium carbonate. Cut a section of old pipe and the deposit is visible on the pipe wall. Scale narrows the bore and raises velocity, which wears thin spots faster.
Nothing above is a photograph of a real repair. These are drawn illustrations of what a slab leak does to a floor and to a pipe, and they stay until releases exist.
That is a fair position, and it is exactly why rerouting exists. A reroute abandons the failed line and runs new pipe overhead or through walls instead of through concrete. It costs more in pipe and less in floor repair, so ask for both numbers.
A slab leak does not stabilize. It is pressurized water in the soil under your foundation, and it keeps running until the line is repaired or shut off. The damage and the bill both grow while it waits.
Sometimes for the resulting damage, less often for the pipe itself, and it depends entirely on your policy. Get the location and scope in writing, since that document is what an adjuster asks for. We cannot tell you what your carrier will do.
By isolation. Hot and cold get tested separately, the meter is read with the house shut down, and surface temperature is compared across the floor. If the evidence points at a wall instead, the job changes and so does the price.
Sometimes that is the right call, particularly after a second failure on the same line. Published PEX repipe ranges run $4,000 to $10,000, so the comparison is against repeated slab openings rather than against a single repair.
We cover slab leak repair in every part of the valley listed below. Each area page names the office that issues the plumbing permit there and who owns the sewer line at the curb, because both genuinely differ from one city to the next.
Say it is about this when you call and you skip the sorting.
We are a service area business. We come to you, so there is no counter to visit and no street address on this page. The number above is the fastest way in.
About a minute of detail changes what we can tell you on the call.
A slab leak is a leak in a water line that runs under the concrete foundation of a house. Because Las Vegas homes are built on slabs instead of basements, supply lines often pass below the floor. When one fails, the water has nowhere to go but through the concrete.
Hot water lines are the more common failure. They carry heat as well as pressure, so the pipe wall works harder over the life of the house.
The classic sign is a warm patch on the floor in one spot, with the rest of the room normal. Add the sound of running water with every tap off, a bill that climbed, and a meter indicator that keeps moving. Any two together is a strong signal.
Confirming it is still a process of elimination. Hot and cold get isolated, the meter is read with the house shut down, and the floor is scanned before anyone commits to opening concrete.
Published cost guides put slab leak repair at $630 to $4,400, with a national average near $2,280. Rerouting the line around the slab instead of breaking it runs about $600 to $4,000. Detection beforehand is listed separately at $150 to $400. Those are market figures.
The spread is wide for a real reason. Depth, flooring type, the length of the run and whether the line has failed before all move the final number.
It depends on the pipe and the floor. Breaking the concrete is usually cheaper when one section failed and the rest of the system is sound. Rerouting makes more sense when the flooring is expensive to restore, or when that line has already leaked once before.
A reroute also buys new pipe on that run, which matters when the original line is near the end of its life. The trade is longer pipe runs and some drywall work.
Repairing a leak in a pipe, valve or fixture is listed in Clark County Code 22.02.195 as work needing no permit. Replacing or rearranging concealed piping is not on that list, so a reroute or a repipe is treated differently. Your jurisdiction decides.
Unincorporated county permits come from the Department of Building and Fire Prevention at 4701 West Russell Road. Las Vegas, North Las Vegas, Henderson and Boulder City each run their own building department.
Most single point repairs are a one day job once the leak is located. Opening the concrete, replacing the section, testing and patching usually fit inside a working day. A reroute takes longer, often two days, because the new run has to be pulled and walls closed.
Drying the affected area can take longer than the plumbing. Concrete holds moisture, and flooring work usually waits until the slab reads dry.
Age is not the only driver here. Water hardness, water velocity and installation detail all matter. The water district publishes a saturation index of plus 0.25, meaning valley water deposits scale. Scale changes how water moves inside a pipe over time.
About 47 percent of Clark County homes were built in 2000 or later. Plenty of slab leaks turn up in houses their owners consider new. A line rubbing a rough spot in the concrete does the rest.
Describe what is happening and we will tell you what it usually takes to fix.