Short answer: A water leak under the driveway often shows up as water seeping from concrete joints, a wet patch that never dries, cracks or sinking pavers and a high water bill. Pros pinpoint the spot with listening gear or tracer gas, then cut one small opening, bore a new line beside the slab or reroute the pipe around it.
A water leak under the driveway is stressful because you can't see the pipe. Every option seems to involve a jackhammer. The good news is that most leaks can be pinpointed first, so only a small section needs opening. SRQ Leak Pros can connect you with a local provider for underground leak detection in Sarasota to find the exact spot.
Here's how to tell what you're dealing with and what the fixes look like.
Signs of a water leak under the driveway
- Water seeping up through joints or cracks on dry days
- A dark, damp patch on the concrete that won't dry
- Pavers that sink, shift or rock underfoot
- New cracks or a lifted section of slab
- Moss, algae or mineral stains along one line
- Hissing near the meter with all water off
- A higher water bill with no change in use
Water that only appears after rain or sprinklers may be runoff, not a leak. Check on a dry morning with irrigation off.
Why do water lines leak under driveways?
Driveways sit over many service lines because the meter is near the street and the house is set back. Common causes:
- Load and vibration. Vehicles flex the slab and the soil under it.
- Settling. Soil moves and stresses rigid pipe and joints.
- Old pipe. Polybutylene, galvanized and aging copper all fail with age.
- Poor bedding. Rocks against the pipe can wear a hole over time.
- Roots. Trees nearby push and crack lines.
How to confirm a leak before calling a pro
- Shut off all water. Inside and out, including sprinklers.
- Watch the meter. If the flow indicator moves, water is leaking.
- Close the main shut-off. If the meter still moves, the leak is likely between the meter and the house.
- Map the wet area. Note where water shows first and photograph it.
This narrows the search before anyone touches concrete.
Wet spot on the driveway that won't dry? Call to reach a local leak detection pro.
Call (941) 541-0938How do pros find a leak under concrete?
The goal is to pinpoint the leak to within a few feet. Wikipedia's leak detection article describes acoustic methods, which listen for the sound of water escaping a pressurized pipe. Tracer-gas leak testing is another. Wikipedia describes it as filling a system with a gas and finding where it escapes with a sensor.
| Method | How it works | Best for |
|---|---|---|
| Acoustic listening | Ground microphones hear water escaping | Pressurized lines under concrete |
| Tracer gas | Safe gas is pushed into the drained pipe and sensed at the surface | Quiet leaks and plastic pipe |
| Line tracing | A locator maps the pipe route | Knowing where to listen |
| Pressure test | The line is isolated and watched on a gauge | Confirming the leak is on that section |
| Thermal imaging | A camera shows cool or warm wet areas | Some surface patterns |
How to fix a water leak under the driveway
Once the leak is found, there are three common paths.
1. Cut a small access hole. The crew saw-cuts a square of concrete or lifts a few pavers, repairs the pipe, then patches. This works best when the leak is pinpointed and the rest of the line is sound.
2. Bore a new line. Directional boring, a trenchless method, runs a new pipe under the driveway without breaking it. This fits older lines that will keep leaking.
3. Reroute the line. A new line goes around the driveway, through lawn or beds, and the old pipe is abandoned.
| Option | Concrete damage | Best when |
|---|---|---|
| Spot repair | One small cut | One leak, otherwise sound pipe |
| Directional bore | Little or none | Old pipe; driveway worth saving |
| Reroute | None | Open lawn path is available |
Pavers are often easier than poured concrete. They can be lifted, set aside and relaid. Stamped or decorative concrete is harder to match, which makes boring or rerouting more appealing.
How much does it cost to fix a water leak under a driveway?
Angi's national data, updated December 2024, puts the average main water line leak repair at about $1,025, with most jobs between about $354 and $1,696. Plumbers charge about $45 to $200 an hour in that data. Concrete cutting, patching and paver work can add to the total. A bore or reroute costs more up front but avoids slab repair. See main water line repair cost for a fuller breakdown.
Florida rules to know
Florida requires a call to Sunshine 811 at least two full business days before digging, so other buried utilities can be marked. Repair of the line from the meter to the building is plumbing contractor work in Florida. If the leak sits between the street and the meter, it may be the utility's. Sarasota County's leak FAQ says its staff decide whether a reported leak is the county's or the customer's.
Sarasota driveways and hidden leaks
Many Sarasota homes have pavers or decorative concrete over the service line. Sandy soil can wash out from under a slab when a leak runs for weeks. That leaves a void that cracks the concrete. Heavy summer rain can hide a leak for a while, so check during a dry spell. In flood-prone areas, a high water table can also make a dig fill with water.
How to prevent driveway water line leaks
- Know where the line runs before adding pavers or extensions.
- Keep heavy equipment and dumpsters off the line path.
- Ask for sleeving where any new line passes under concrete.
- Replace a failing old line before a new driveway goes in.
- Watch your meter monthly for small leaks.
Local note: paver drives are common in Lakewood Ranch, which can make a spot repair easier. Long driveways on North Port lots put more pipe under concrete. Older slabs in Bradenton may sit over aging metal lines.
Related reading: start with how to find a water leak underground and learn the signs of a water service line leak. If you need the route first, read how to locate underground water lines. A wet strip that only appears after watering may be an irrigation leak instead.
When should you call a leak detection professional?
Call a pro when:
- Water seeps from the driveway on dry days
- The meter moves with all water off
- Pavers sink or concrete cracks along one line
- You want to avoid breaking more concrete than needed
Leak under your driveway? Call (941) 541-0938 to reach a local leak detection provider.
Call (941) 541-0938Frequently asked questions
Can a leak under a driveway cause a sinkhole?
A long-running leak can wash sandy soil away and leave a void under the slab. That can lead to cracking or a depression. Fix leaks early to limit it.
Is a leak under my driveway my responsibility?
If it's on the house side of the meter, it's usually the owner's. A leak between the street and the meter is usually the utility's.
Will homeowners insurance pay for a driveway water line leak?
Policies vary. Many don't cover the pipe repair itself but may cover sudden damage it causes. Read your policy and ask your agent.
Can a leak be fixed without breaking the driveway?
Often, yes. A bore or reroute can replace the line without cutting the slab.
Sources
Related guides
Costs & InsuranceMain Water Line Repair Cost: What to Expect and Why
National repair price data, the factors that change a quote, and when replacement makes more sense.
Finding LeaksHow to Find a Water Leak Underground
Six steps to narrow down a buried leak yourself, and the tools pros use to pinpoint it.