McKinney is really three cities wearing one name. There’s the historic core around the square, with homes going back a hundred years. There’s the 1990s expansion — Stonebridge Ranch and its neighbors — that turned McKinney into a boom town. And there’s everything built since 2000, from Eldorado out to Craig Ranch and the 380 corridor.
Each of those McKinneys has different plumbing under it, fails differently, and deserves a different repair conversation. A plumber who treats them the same is guessing with your floor.
What is a slab leak?
A slab leak is a break in one of the pipes running beneath a home’s concrete foundation — a pressurized copper or PEX water line, or a cast-iron or PVC drain. On slab-on-grade construction, the concrete was poured directly over the plumbing, so when a buried line fails, the water goes into the soil, up through the slab, or out along the foundation edge.
Pressurized leaks push water out around the clock and show up fast — on the bill, the floor, or the meter. Drain leaks seep quietly, sometimes for months, washing out the soil that keeps your foundation level.
Which McKinney do you live in? It changes the diagnosis.
Near the square (pre-1960s): many of these homes sit on pier-and-beam foundations, not slabs. A leak under the house is often reachable through the crawl space — a different and frequently simpler repair. We confirm the foundation type before recommending anything, because “slab leak repair” on a house without a slab is the wrong conversation entirely.
The 1990s wave (Stonebridge Ranch era): this is McKinney’s slab-leak heartland right now. Copper installed 25 to 35 years ago is entering the age window where pinholes and joint failures begin, and it sits in Blackland Prairie clay that has been working every buried joint through every wet-dry cycle since.
Built after 2000 (Eldorado, Craig Ranch, the 380 corridor): mostly post-tension slabs with copper or PEX. Failures here are usually at fittings and construction-era weak points rather than corroded pipe — and any slab opening requires locating the tension cables first.
How do I know if I have a slab leak?
Most slab leaks show at least one of these signs early. One alone isn’t proof — two or more means it’s worth a test.
- A warm or hot spot on the floor — almost always a leaking hot-water line under the slab.
- A water bill that jumped with no change in usage. A pressurized leak runs 24/7.
- Running-water sounds with everything off. Shut down every fixture and listen near the floor.
- Damp flooring, cracked tile in a line, or buckling wood with no appliance or roof leak above.
- A sewage smell that won’t go away — possibly a drain line seeping under the slab.
- Doors that suddenly stick or fresh drywall cracks — washed-out soil moves the foundation, and the house moves with it.
Quick at-home check: shut off all water inside and out, then watch the leak indicator on your meter. Movement with everything off means water is escaping somewhere.
How do you find a slab leak without tearing up my house?
We locate before we open — every time. The methods, layered as the situation requires:
- Electronic line tracing & pressure testing to isolate which line is failing and where it runs.
- Acoustic listening equipment that amplifies the sound of water escaping under concrete.
- Thermal imaging for hot-water leaks, and a sewer camera to inspect drain lines from the inside.
- Foundation-type confirmation — and on post-tension slabs, cable location before any cut.
For suspected sewer leaks we run a static (hydrostatic) test — isolate the drain system, fill it, and watch whether it holds. When concrete does get opened, it’s a targeted cut over a confirmed leak, not exploration.
How are slab leaks repaired?
The right repair depends on the era of the house, where the leak is, and how much of the system carries the same risk. After detection, you get the realistic options with flat-rate pricing on each before any work starts.
| Method | Best when… | Tradeoff |
|---|---|---|
| Spot repair (open & fix) | The leak is isolated and the pipe around it is sound — common on newer McKinney builds | Fastest and lowest cost; small targeted opening |
| Reroute / re-pipe the line | 1990s copper that has leaked once — the line will likely fail again elsewhere | Abandons the tired run with new pipe overhead or through walls; carries our lifetime warranty |
| Whole-home repipe | Original copper failing in multiple spots across the house | Larger project, but ends the leak-chasing cycle for good |
| Sewer line repair | A cast-iron or PVC drain has broken under the slab | Trenching or trenchless depending on what the camera shows |
The honest pattern for the Stonebridge-era neighborhoods: once 1990s copper has leaked one time, the cheapest spot repair is often the most expensive path, because the next pinhole on the same line is usually months out, not years. We’ll tell you which situation you’re actually in — and we won’t sell a repipe where a reroute does the job.
How we handle a slab leak call
Confirm & locate
We confirm what your foundation actually is, verify the leak, and pinpoint it with electronic, acoustic, and thermal tools — before opening anything.
Show you the options
You see what we found and get upfront, flat-rate pricing on each realistic repair. No work starts until you say go.
Make the repair
A licensed master plumber does the work — spot repair, reroute, repipe, or sewer fix — with the smallest footprint the job allows.
Test & warranty
We re-test to confirm the leak is gone and back the work: 5-year warranty on spot repairs, lifetime warranty on full reroutes, 2-year labor warranty on all other work.
What does slab leak repair cost in McKinney?
Anyone quoting a slab leak over the phone without seeing it is guessing. The honest answer depends on the detection, the repair method, and how the line was run. What we promise is no mystery math: a ~$69 service call fee credited toward the work, a written flat-rate price before we start, and a clear explanation of why one option costs what it does. Financing is available, including 0% interest options, on larger repairs.
Worth knowing: many Texas homeowner policies cover the resulting water damage from a slab leak (and sometimes access to the pipe) even when they don’t cover the pipe itself. We document what we find so you have what you need to file.
Think you have a slab leak? Start here.
Three things to do today, in order:
- Do the meter test. Shut off all water inside and out, then check whether the meter’s leak indicator keeps moving. Movement with everything off means water is escaping.
- If a hot spot, active water, or fast-rising bill is involved, shut off the water at the main to stop the damage, and call a licensed plumber to locate it.
- Don’t let anyone break concrete to “look.” The leak should be located with detection equipment first — and on newer homes, the post-tension cables mapped before any cut.
Signs it’s time to call a plumber
Call us to test for a slab leak if you notice any of these — the earlier it’s caught, the less it costs:
- A warm spot on the floor, or a water bill that climbed with no change in habits.
- Running-water sounds with every fixture off, or a sudden drop in water pressure.
- Damp flooring, cracked tile in a line, or a sewage smell you can’t track down.
- You’re buying or selling a McKinney home and want the water and sewer lines tested first.
- You’re having foundation work done — test for leaks before piers go in.
One honest caveat: a plumber fixes the leak, not the foundation. If a long-running leak has already moved your slab, you may need a foundation engineer as well — we’ll tell you if we think you’re at that point.
McKinney slab leak FAQ
How much does slab leak detection cost in McKinney?
Staggs Plumbing charges a roughly $69 service call fee that is credited toward the work if you move forward. After we locate the leak, you get a written flat-rate price for the repair before anything starts. We do not quote slab leak repairs sight-unseen, because the real cost depends on the method and how the pipe was run.
Can a slab leak be fixed without breaking my floor?
Often, yes. Many slab leaks are repaired by rerouting the bad line overhead or through walls instead of opening the slab, especially on 1990s-era copper that is likely to leak again. When a spot repair is the better call, we locate the leak precisely first so the opening is small and targeted, not exploratory.
Will my homeowners insurance cover a slab leak in Texas?
It depends on your policy. Many Texas homeowner policies cover the resulting water damage, and sometimes the cost to access the pipe, even when they do not cover the pipe repair itself. We document what we find so you have what you need to file a claim, but you should confirm coverage with your insurer.
Why are slab leaks showing up in Stonebridge Ranch and other 1990s McKinney neighborhoods?
Timing. Copper supply lines installed during the 1990s building wave are now roughly 25 to 35 years old — the age window where pinhole leaks and joint failures start appearing. Those lines sit in expansive Blackland Prairie clay that swells and shrinks with every wet-dry cycle, working the pipe the entire time. The neighborhoods built first are simply reaching that window first.
My home is near historic downtown McKinney — do the same rules apply?
Not always, and it is worth an honest answer. Many older homes near the square sit on pier-and-beam foundations rather than slabs, which means a leak under the house is reachable through the crawl space instead of through concrete — a different and often simpler repair. We confirm what your house actually sits on before recommending anything.
Do you offer 24/7 emergency slab leak service in McKinney?
Yes. Staggs Plumbing runs 24/7 emergency service across McKinney and North Texas with a roughly 45-minute average response time. If you have active flooding or a burst line, shut off your main water valve and call (682) 284-0966.
