Dan’s Plumbing Est. 1977 · Westlake Village Call Danny (805) 330-3111 Request a visit

Lake Sherwood · Slab leaks

Slab leak repair
in Lake Sherwood

Slab leak repair in Lake Sherwood, ten minutes, over the hill from the shop in Westlake Village. Most houses built in the Conejo Valley between 1965 and 1990 sit on a concrete slab with the copper water lines run through it. That copper is now fifty years old, and slab leaks are what happens next.

Call (805) 330-3111 Request a visit

Danny picks up when he can, and calls back the same day. You get the price before we start, and nobody here is on commission. Monday to Friday, 9am – 5pm.

Licensed CSLB #339618
Insured Bonded and insured
Since 1977 49 years, two generations
On Google 5.0 stars
From the shop Ten minutes, over the hill
Permits Ventura County. Lake Sherwood is unincorporated.
Guarantee One year on our labor. Thirty days on drain clearing.
License CSLB #339618

In Lake Sherwood

What this job looks like
in Lake Sherwood

Lake Sherwood makes a slab leak harder to spot, because a property here has lines running out to a guest house, the pool equipment and the irrigation, and any one of them can turn the meter and lift a bill the same way. So we isolate the house from the outbuildings and from the irrigation first, then hot from cold, and narrow it to a line. Where it is under concrete, the leak-locating specialist we work with listens through the slab and marks the spot before anything is cut. Then a spot repair at that mark or a reroute overhead. Any permit goes through Ventura County.

Streets and pockets we work in: Sherwood Country Club, the lake, the Hidden Valley edge, the older lakeside streets.

01

Work nobody can account for

Older lakeside houses

Plumbing of mixed vintage that several generations have extended. We work out what is there first, then repair or replace on what we find.

If that is what yours is doing (805) 330-3111 Mon–Fri 9–5 Request a visit →

The job

How it goes

A slab leak is a water line leaking under or inside the foundation. Copper under concrete fails from the outside, where the pipe touches soil or the slab itself, and from the inside, where high water pressure and hard water wear it thin. Hot lines go first, because hot water is harder on copper. The tells are a warm patch on the floor, a meter that keeps turning, a bill that has jumped, or a sound of running water with nothing on.

Finding it is the first job, and it is done from above. We isolate the line with the meter and gauges, then bring in the leak-locating specialist we have used for years to listen for it through the slab and mark the spot to within a foot or so, along with any post-tensioned cables in the concrete. Then there are two ways to fix it. A spot repair opens the floor at the mark, cuts out the failed section and puts in new pipe. A reroute abandons the line under the slab and runs a new one overhead, through the attic and down the wall, so nothing is left in the concrete to fail again.

Which one is right comes down to the condition of the rest of the line. One leak on a line that is otherwise sound is a spot repair. A second leak on the same line within a year or two means the pipe itself is done, and rerouting it is cheaper than opening the floor a third time. We tell you which situation you are in, and why, before you decide.

Call if

What you notice,
and what it usually is

01

A warm patch on the floor

A hot line leaking under the slab. The most common slab leak there is.

02

The meter turns with everything off

A pressurized leak somewhere. If nothing is visible, the slab is the usual place.

03

Damp carpet or lifting flooring, no fixture near it

Water coming up through the slab.

04

The water heater runs all the time

Hot water leaving through a leak, so the tank never catches up.

05

A second leak a few months after the first

The line is failing. Time to talk about a reroute.

How it goes

Four steps, and you have the price at step three

  1. 01

    You call

    Danny picks up when he can, and calls back the same day. Tell him what it is doing and where.

  2. 02

    We look

    We come out, find the cause and show you. In plain words, with the part in our hand where there is one.

  3. 03

    You get a price

    Before anything starts. Repairs are our time plus parts, and the bigger jobs get a written bid. Nobody here is on commission.

  4. 04

    We do the work

    Small repairs are usually done the same visit. Bigger jobs get a start date and a number of days, and we hold to it. Done to code, permitted where it needs it, the house left the way we found it.

Common questions

Slab leaks in Lake Sherwood: things people ask

Do you go through the gate at Sherwood?
Yes. We call ahead with the truck and the name so the gate is expecting us. If you have an estate manager, they can set it up with us directly.
How fast can you get to Lake Sherwood?
Ten minutes over the hill from Westlake Village, so same day is usually realistic. For planned work on a large house we come out first and walk it.
Do you have to break up the floor?
For a spot repair, one opening about the size of a coffee table, at the mark. For a reroute, no floor is opened at all: the new line runs overhead and comes down the wall.
How long is the water off?
A spot repair is usually one day. A reroute of one line is one to two days, and the water is only off while the new line is connected at each end.
Will my insurance cover a slab leak?
Many policies cover the damage and the access work, and not the pipe. Check yours. We document the leak with photographs and give you a written scope, which is what the adjuster asks for.

A question that is not here (805) 330-3111 Mon–Fri 9–5 Request a visit →

Google reviews

What people say

5.0 ★★★★★ 5 reviews on Google

★★★★★

“Dan is consistent. Professional, on time, only does what is needed, experienced, easy to work with, clean, and smart.”

Chad Hellmuth · September 2026

★★★★★

“Dan's Plumbing did excellent job for us replacing our broken water pressure regulator. Quick response, good price, great quality of work. Will hire them again.”

Igor Gavryushkin · Westlake Village · January 2026

Nearby, and related

More in Lake Sherwood,
and this job elsewhere

Slab leaks nearby: Westlake Village · Thousand Oaks · Agoura Hills · Oak Park

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Slab leaks · Lake Sherwood

Tell Danny what
it’s doing

Describe the symptom and you will usually have an answer in two minutes. You get the price before any work starts. Ten minutes, over the hill from the shop. Monday to Friday, 9am – 5pm.

Danny picks up

(805) 330-3111 Send Danny the details

Find us

Dan's Plumbing

2352 Hillsbury Rd
Westlake Village, CA 91361

(805) 330-3111 · Monday to Friday, 9am – 5pm

Serving Westlake Village, Thousand Oaks, Agoura Hills, Oak Park and Lake Sherwood. Zip codes 91361, 91362, 91301, 91377.

Call Danny (805) 330-3111