Water Line Leak Under a Driveway: Signs and Repair Options
When the water line runs under a driveway or walkway, a leak is harder to spot and harder to reach. Here is how to recognize it and what your repair options usually look like.
Referral service: Gardena Water Line Pros is not a plumbing contractor. Your call may be connected to an independent, third-party service provider who sets its own availability, pricing and terms. Read our referral disclosure.
The short answer
Water seeping through driveway cracks, a slab that is sinking, or a damp patch that never dries can point to a water line leak under the concrete. Confirm the leak with a meter check, have it located before anything is cut, then compare a small cut-and-patch repair, rerouting the line around the driveway, or a trenchless method.
Signs of a water line leak under concrete
- Water coming up through cracks, control joints or the edge of the driveway when it hasn't rained.
- A dark, damp area on the concrete that stays wet.
- A section of slab that has sunk, tilted or cracked recently.
- Soggy soil or lawn at the edge of the driveway along the line's route.
- A higher water bill, lower pressure, or a meter that moves with all water off.
First, rule out irrigation: see sprinkler leak or main water line leak? Then try the water meter leak check.
Find the leak before cutting concrete
Because concrete is expensive to cut and replace, locating the leak first matters more here than under a lawn. Providers may use pressure testing, acoustic listening, tracer gas or pipe locating to narrow it down. Learn more about underground water line leak detection.
Common repair options
| Option | What it involves | Often considered when |
|---|---|---|
| Cut and patch | Saw-cut a small opening, repair the leaking section, backfill and patch the concrete | One leak on a line that is otherwise in fair condition |
| Reroute the line | Abandon the old pipe and run a new line along a path that avoids the driveway | The old line is aging or has leaked before, and there is a practical route around |
| Trenchless replacement | Install a new line under the driveway from small access pits | Soil, depth and access allow it and a provider offers it |
See when trenchless may be an option and repair vs. replacement.
Questions to ask about the concrete
- How big will the opening be, and where exactly?
- Is concrete restoration included, and will the patch match?
- Is a permit needed for the water line work? (See the permit question on our replacement page.)
- If you reroute the line, what happens to the old pipe?
For how these choices affect the price, read what affects water line repair cost.
This guide is general information, not a diagnosis. An on-site assessment by a qualified provider is the only way to know what's happening with a specific line. Gardena Water Line Pros is a referral service, not a plumbing contractor.
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Frequently asked questions
How do I know if my water line is leaking under the driveway?
Common clues are water seeping from cracks or joints in the concrete, a damp area that never dries, a section of slab that is sinking, plus the usual signs of a service line leak: a rising water bill, lower pressure and a meter that moves with all water off.
Do they have to break up the whole driveway to fix a water line?
Usually not. Providers often locate the leak first and cut only a small section, or they may run a new line around the driveway or use a trenchless method under it, depending on the site.
Is it better to repair under the driveway or reroute the water line?
It depends on the line's condition and route. A single leak on sound pipe may be repaired through a small opening; an old or repeatedly leaking line is often replaced, sometimes along a new path that avoids the concrete.
Does insurance cover a water line leak under a driveway?
It depends on your policy and on what caused the leak. Read does homeowners insurance cover water line repair? and ask your insurer whether excavation and concrete restoration are included.
Water line leaking under your driveway?
Call to be connected with an independent water line provider serving Gardena, when one is available.
Referral service: Gardena Water Line Pros is not a plumbing contractor. Your call may be connected to an independent, third-party service provider who sets its own availability, pricing and terms. Read our referral disclosure.