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Electronic detection, trenchless fixes, and a dry slab floor again
Under-Slab Leak Repair in Laguna Niguel done right the first time
Under-Slab Leak Repair in Laguna Niguel starts with finding the exact break, not guessing at it. We use acoustic listening discs and thermal imaging to pinpoint the line under your concrete, then repair it with the least cutting possible. If your water meter is spinning or a warm spot is spreading across the floor, call (949) 593-2386 and we will be there same day.
Prepared local crewClear options firstFinal testing and walkthrough
Clear scope before work
Review the approach and price before deciding.
Prepared, clean crews
Equipped vehicles and respectful cleanup.
Local accountability
Neighbors serving neighbors with follow-through.
What is included
What our under-slab leak repair includes
Every job is scoped after detection, so you know exactly what you are paying for. Here is what comes standard on a typical under-slab repair in Laguna Niguel, and what we handle as an add-on when the situation calls for it.
Electronic leak detection
Acoustic microphone, listening disc, and thermal imaging to pinpoint the break. This is included on every job and is what keeps us from opening concrete we do not need to touch.
Pressure isolation and confirmation
We shut down the hot and cold sides separately and watch the pressure gauge to confirm which line is leaking. No guessing, no exploratory cutting.
Pipe repair or reroute
Cutting out the failed section and replacing it with new copper, PEX, or CPVC, or rerouting the line overhead when the pipe is too far gone to patch reliably.
Concrete patch and cleanup
Backfill, concrete patching compound matched to your slab, and full cleanup of the work area. We haul away debris and leave the space ready for flooring.
Pressure test and warranty
A 30-minute repressurization test on the repaired line before we close up, plus a written warranty on our workmanship that travels with the repair.
PLAN
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Service overview
What Under-Slab Leak Repair in Laguna Niguel involves
Under-Slab Leak Repair in Laguna Niguel is the process of locating a failed water line beneath your concrete foundation and restoring it so water stops moving through the slab. Most homes here sit on post-tension or conventional slabs poured over copper or older galvanized pipe. When that pipe corrodes, a joint fails, or the soil shifts, water escapes under pressure and starts working its way up through the concrete. We isolate the line, confirm the break with a pressure gauge, and fix it at the source.
Laguna Niguel sits on clay-heavy soil that expands and contracts with our dry summers and wet winters, and that movement is hard on under-slab pipe. Add 40-plus-year-old copper in neighborhoods like Marina Hills and you get pinhole leaks, warm spots on tile, and water bills that jump $80 to $150 in a month. If you are searching for sub-slab leak repair near me in Laguna Niguel, that jump in the bill is usually the first clue something is wrong below the floor.
- Stop the water bill bleed — A hot water line leak under a slab can push a Laguna Niguel bill up $80 to $150 a month before you notice a wet floor. We stop the loss at the pipe, not at the meter, so the next billing cycle reflects the fix.
- Save your flooring — Water wicks up through concrete and ruins tile, laminate, and engineered wood from underneath. Pinpointing the break with a thermal imaging camera lets us open a small section instead of tearing out an entire room, which keeps your flooring budget intact.
- Protect the foundation — Constant moisture under a slab softens soil and can crack the foundation itself. Repairing the pipe early keeps the soil stable and avoids the far more expensive problem of foundation crack from leak damage in Orange County homes.
- Fix it without a full tear-out — Trenchless pipe repair equipment and epoxy pipe lining let us restore many lines through a small access point. That means less concrete cutting, less dust, and a faster return to normal for your household.
- Detection before demolition — We do not open concrete until the leak is confirmed with electronic leak detection equipment. That saves you hundreds in unnecessary cutting and keeps the repair focused on the actual break.
- Same-day and 24/7 response — Water does not wait for business hours. We run emergency calls across Laguna Niguel and the 92607 and 92677 ZIPs, including nights and weekends, so a burst line under the slab gets handled before it floods a room.
- Trenchless options first — When the pipe allows it, we use trenchless pipe repair equipment and epoxy pipe lining to restore the line with minimal access. That means less mess, faster cleanup, and your flooring back in place sooner.
- Written warranty on the repair — Every under-slab pipe leak repair in Laguna Niguel CA comes with a written warranty on our workmanship. If the same line fails again within the warranty window, we come back and make it right at no charge.
The service timeline
How our under-slab leak repair process works
Phone triage
You call (949) 593-2386 and describe what you are seeing: warm spot, spinning meter, damp carpet, or a spike in the bill. We ask a few questions to narrow down whether it is a hot or cold line, then schedule a same-day visit in most of Laguna Niguel and the 92677 ZIP.
Electronic detection
On site, we pressurize the system and listen with an acoustic leak detection microphone and listening disc. A thermal imaging camera confirms hot-line leaks by showing the temperature trail under the floor. This step usually takes 45 to 90 minutes and tells us exactly where to cut.
Line isolation and confirmation
We isolate the hot and cold sides with shutoff valves and watch the pressure gauge. If pressure holds on one side and drops on the other, we have our line. A video pipe inspection camera through an accessible cleanout confirms the pipe material and condition before we commit to a repair method.
Repair or reroute
For a straight section, we cut a small access point and repair with copper, PEX tubing, or CPVC pipe and new fittings. For a line that is corroded along its length, we reroute it overhead through the attic or walls so the slab stays intact. Most repairs are done in one day.
Test and patch
We repressurize the line, hold it for 30 minutes, and check every joint. Once it holds, we backfill and finish the opening with concrete patching compound matched to your slab. You get a written warranty on the repair and a walkthrough before we pack up.
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Tools and methods we use on every job
Acoustic leak detection microphone
Listens for the sound of pressurized water escaping a pipe under the slab to narrow the search area to within a few inches.
Thermal imaging camera
Shows the temperature trail of a hot water line leak through concrete, tile, and laminate without any cutting.
RIDGID SeeSnake video pipe inspection camera
Confirms pipe material, condition, and the exact location of joint failures or corrosion inside the line.
Pressure gauge and isolation valves
Confirms which side of the system is losing pressure so we repair the right line the first time.
LeakTronics detection platform
Combines acoustic and electronic sensors for accurate pinpointing on both hot and cold under-slab lines.
Infrared thermometer
Maps temperature differences across the floor to trace hot-line leaks and confirm the repair has cooled the slab.
Trenchless pipe repair equipment
Restores many lines through a small access point, avoiding a full tear-out of the slab and flooring.
Electronic leak detection and isolation
We pressurize the system, isolate hot and cold sides, and use acoustic and thermal tools to pinpoint the break. This is the standard first step on every job and it is what keeps concrete cutting to a minimum.
Spot repair with copper, PEX, or CPVC
For a straight section with sound pipe on either side, we cut out the failed piece and replace it with new material and fittings rated for under-slab use. Most spot repairs are completed in a single day.
Overhead reroute
When the under-slab line is corroded along its length, we abandon it and run a new line through the attic or walls. This keeps the slab intact and is often the better long-term call for older Laguna Niguel homes.
Epoxy pipe lining
For certain pipe types, we line the inside of the existing pipe with epoxy to seal pinholes and small cracks without replacing the run. It is a trenchless option that works well when the pipe is otherwise structurally sound.
Pressure test and concrete patch
Every repair is repressurized and held for 30 minutes before we close up. Then we backfill and finish the opening with concrete patching compound matched to your slab.
Where this service helps
When under-slab leak repair is the right call
A 1978 ranch home in Laguna Niguel with original copper pipe and a rising water bill.
We run electronic detection, confirm a pinhole on the hot side, and cut a small access point in the hallway. The failed section is replaced with new copper and the slab is patched the same day. Water bill returns to normal within one billing cycle and the floor is back in use the next morning.
A townhome near Crown Valley with a warm spot spreading across the tile in the entry.
Thermal imaging traces the hot line under the tile. We lift only the affected tiles, repair the leak, and set the tiles back so the floor matches. No visible repair scar and the warm spot is gone within 48 hours as the slab dries.
A commercial property in Laguna Niguel with water pooling in a back office overnight.
We respond after hours, isolate the affected zone, and confirm a failed joint on the cold line. The section is replaced and the line is pressure-tested before the office opens. Business opens on time with no water intrusion and no disruption to the tenant.
A homeowner in the 92677 ZIP whose meter is spinning with every fixture off.
We run a full isolation test, find the leak on the water service line under the slab, and repair the failed section with new pipe and fittings. Meter stops spinning, pressure is restored, and the repair is warrantied in writing.
Local execution
How under-slab leak repair runs in Laguna Niguel
Laguna Niguel's housing stock ranges from late-1960s ranch homes to 1990s and 2000s builds, and the plumbing under each one behaves differently. Older homes near Crown Valley and Marina Hills often have original copper that is now at the end of its service life, while newer builds off Alicia Parkway tend to use PEX and CPVC. Our clay soil expands in wet winters and shrinks in dry summers, and that movement flexes under-slab pipe until joints fail. We also work with post-tension slabs, which have specific cutting limits we respect on every job. If you are looking for under-slab leak detection and repair in Laguna Niguel, we handle the detection, the pipe repair, and the concrete patch in one coordinated visit, usually the same day you call.
Marina Hills
Mostly 1980s and 1990s homes with copper supply lines that are now showing pinhole leaks at a steady rate.
Rancho Niguel
Mix of older and newer builds; we see both copper failures and PEX fitting issues under the slab.
Crown Valley area
Older ranch homes with original plumbing and post-tension slabs that require careful cutting limits.
Alicia Parkway corridor
Newer construction with PEX and CPVC lines; leaks here are usually at fittings rather than mid-run.
Bear Brand
Hillside properties where soil movement puts extra stress on under-slab pipe joints.
Clay-heavy soil that expands and contracts seasonally
Repeated flexing stresses pipe joints and accelerates corrosion, which is why we see more joint failures here than in sandy-soil areas.
Post-tension slab construction in many neighborhoods
Cutting limits are stricter, so accurate detection matters even more. We map the tendons before any concrete is opened.
Warm inland temperatures and dry summers
Hot water lines run at higher sustained temperatures, which speeds up corrosion on older copper and shortens the life of failing joints.
Aging copper supply lines in 1970s and 1980s homes
Pinhole leaks and joint failures are common, and we often recommend a reroute when the whole run is near end of life.
Before and after
What a successful service visit changes.
Hot line leak under kitchen tile
Before
A Laguna Niguel homeowner noticed a warm spot on the kitchen tile and a water bill that jumped $130 in one month. Two other plumbers wanted to open the entire kitchen floor before finding the leak.
After
We pinpointed the break with thermal imaging in under an hour, cut a 2-foot section, replaced the copper, and patched the slab the same day. The next bill dropped back to normal and the warm spot disappeared within 48 hours.
Maintenance: Keep an eye on the water bill for the next two cycles and check the patch for any hairline cracking. We recommend a full slab leak inspection every three to five years on original copper systems.
Cold line reroute in a 1970s ranch home
Before
A home near Crown Valley had a cold line leaking under the hallway slab. The copper was corroded along most of the run, and a spot repair would have failed again within a year or two.
After
We abandoned the under-slab section and rerouted the line through the attic in one day. No slab cutting, no flooring removed, and the pressure has held steady through two full seasons of testing.
Maintenance: Insulate the new attic run if it passes near the roofline and have the line pressure-tested every few years. The old under-slab line stays abandoned and does not need further attention.
Emergency night call for a burst slab line
Before
A property manager called at 9 p.m. with water coming up through a tenant's bathroom floor. The meter was spinning and the tenant had already shut off the angle stops with no effect.
After
We were on site within the hour, isolated the line, and stopped the water that night. The failed joint was repaired the next morning, pressure-tested, and the slab was patched by early afternoon.
Maintenance: Watch the repaired area for any new moisture over the next two weeks and keep the tenant informed of the water bill for one cycle. We warranty the repair in writing.
Problems we solve
Problems we solve with under-slab leak repair in Laguna Niguel
Most under-slab leaks announce themselves in one of a few ways. If any of these sound familiar, the leak is already costing you money every day it runs.
Water bill jumped with no change in usage
A running leak can add $80 to $150 a month to your bill and keep climbing until the line is repaired. We isolate the hot and cold sides, watch the meter with everything off, and pinpoint the break with electronic detection equipment. Once located, we repair the line and re-test so the loss stops at the source.
Warm spot on the floor that will not cool down
A hot water line leak under the slab heats the concrete from below and can warp tile or laminate within weeks. We trace the temperature trail with an infrared thermometer and thermal imaging camera, then repair the hot line with new copper or PEX. The warm spot fades as the slab dries.
Water seeping through the concrete slab
Visible moisture means the leak has been running long enough to saturate the soil and wick up through the slab, risking mold and foundation damage. We locate the source, repair the pipe, and confirm the slab is drying. If moisture has reached the foundation, we coordinate with the structural side so the fix is complete.
Water meter spinning with all fixtures off
A spinning meter with no water running means an active leak somewhere on the system, and it is usually under the slab in older Laguna Niguel homes. We run a full isolation test, confirm which line is losing pressure, and repair it. If the pipe is too corroded to patch, we reroute it overhead so the slab stays intact.
Proof behind the promise
Licensed, insured, and warrantied
Technical expertise
Local experience you can put to work
Our technicians work on Laguna Niguel slabs every week, from 1970s ranch homes near Crown Valley to newer builds off Alicia Parkway. We carry California Contractor License (C-36 Plumbing) credentials, follow IAPMO Uniform Plumbing Code (UPC) standards on every repair, and hold Backflow prevention certification and OSHA safety certification. That means the work is code-correct, permitted where required, and safe for your family. We also carry EPA WaterSense guidance into every conversation about fixture upgrades that reduce future strain on your lines.
- State-licensed plumbing contractor with C-36 credentials and full insurance on every job
- Trained on RIDGID SeeSnake and LeakTronics detection platforms for accurate pinpointing
- Hands-on with copper, PEX, PVC, and CPVC systems common in Laguna Niguel housing stock
- Experienced with post-tension slab construction and the cutting limits that come with it
- Backflow prevention certified and current on Orange County plumbing code requirements
What causes an under-slab leak in Laguna Niguel?
The most common cause is corrosion of copper pipe under the slab, usually after 30 to 50 years, followed by pipe joint failure and soil movement. Laguna Niguel's clay soil expands and contracts with wet winters and dry summers, which flexes the pipe and stresses joints. Abrasion against gravel or rebar during the original pour can also wear a pinhole through the wall over time.
How much does under-slab leak repair cost in Laguna Niguel CA?
Typical 2026 pricing in Laguna Niguel runs $450 to $1,800 for a spot repair and $2,500 to $6,500 for a reroute or longer replacement. Cost depends on whether it is a hot or cold line, how deep the pipe sits, and how much concrete has to be opened. Detection alone usually runs $250 to $450 and is credited toward the repair when you hire us.
Can you repair a sub-slab leak without breaking the floor in Laguna Niguel?
Often, yes. If the line can be rerouted through the attic or walls, we can abandon the under-slab section and run new PEX or copper overhead without touching your floor. When the leak is in a straight run and the pipe is otherwise sound, a small access cut is usually the fastest and least expensive option. We will tell you which applies after detection.
How long does under-slab leak repair take in Laguna Niguel?
Detection takes 45 to 90 minutes. A spot repair on an accessible line is usually a one-day job, with concrete patched the same afternoon. A full reroute through the attic or walls typically runs one to two days depending on the run length and how much drywall has to be opened and closed. We give you a realistic timeline before we start.
Frequently asked questions
Frequently Asked Questions
Not seeing your question? Our local team can help you understand urgency, scheduling and what to expect.
Ask the local teamRelated services
Related Services
Slab Leak Repair
The broader service that covers any leak under your concrete floor. If detection points to a break outside the under-slab pipe itself, this is the umbrella job we run for Laguna Niguel homes.
View service
Slab Leak Detection
The first step in every under-slab job. We use acoustic microphones, thermal imaging, and pressure isolation to find the exact break before any concrete is opened in your Laguna Niguel home.
View service
Emergency Slab Leak Repair
When water is actively pooling or your meter will not stop spinning, we roll 24/7 across Laguna Niguel and the 92677 ZIP. We shut down the line, stop the loss, and repair it the same visit when possible.
View serviceHot Water Line Slab Leak Repair
Hot-line leaks show up as a warm spot on tile or a hot streak across the floor. We trace the temperature trail with an infrared thermometer and repair the line without opening more slab than necessary.
View service
Contact the local team
Call for Slab Leak Help
Reach us at (949) 593-2386 any time, day or night. We answer live, ask the right questions about your water bill and floor symptoms, and dispatch a technician with detection gear. Most calls in Laguna Niguel and the 92677 area get a tech on site the same day.