Repiping in Santa Clarita

When repairs stop making sense

One leak is a repair. A repipe is worth pricing when the pipes themselves are the problem, and they tend to show it in a few ways:

• Pinhole leaks that keep turning up in different places on the same lines.
• Rusty or discolored water from the taps.
• Pressure that has dropped through the whole house, or falls off when two fixtures run at once.
• Rust on galvanized steel pipe and fittings where they show.
• A slab leak, in a house where the same pipe runs under the rest of the floor.

None of these settles it on its own, and age alone doesn’t either. LADWP’s water quality guidance puts galvanized steel at about 20 years on average before rust shows, as long as 40 if the pipe was well made and only a few if it wasn’t. Low pressure can also come from a failing pressure regulator, a valve that isn’t fully open or clogged faucet aerators, which LA County Public Works lists beside an aging galvanized line, so it pays to rule those out first. The guide to repairing or repiping compares the two, costs included. When you know water is going somewhere but not where, leak detection is the place to start.

Whole house repipe

A whole house repipe replaces every hot and cold supply line, from the point where water enters the house to each fixture. The new lines usually run through the attic and down inside the walls to the sinks, toilets, tubs and showers, the water heater, the washer and the outdoor hose bibs.

In a house whose lines run under the slab, a repipe can move the water overhead, so the old lines in the slab are no longer in use and can’t leak again.

PEX vs copper

A PEX repipe and a copper repipe do the same job with different pipe:

PEX has to be kept out of sunlight, so a run outdoors is buried, sleeved or done in another material. Copper has the longer record in homes: it spread through American houses after World War II, while PEX reached North America in 1984, at first mostly for radiant floor heating. Ask which pipe a repipe price is based on: two prices for the same house aren’t comparable unless they are for the same pipe.

Partial repipe

Pipe replacement doesn’t have to mean the whole house. A partial repipe replaces one part of the system: the lines to one bathroom, the hot side only, a run that has leaked more than once, or a line rerouted around the slab after a leak. It usually costs less than a whole house repipe and can be the right call when the rest of the pipe is sound.

Pipe of the same age and material tends to wear the same way, though, so in a house with several leaks, price the whole house before deciding. Replacing the line between the meter and the house is a separate job too: plumbing repair covers it, along with single failed fittings, valves and supply lines.

Permits for a repipe

In the City of Santa Clarita, “Repipe” is on the city’s list of instant online permits for homes. The city’s fee schedule for 2026 to 2027 lists a single-family repipe at $129 per unit, with the $38 permit issuance and $22 residential inspection fees on top: $189, plus the 10% record maintenance fee where it applies. The schedule prints no total; the $189 adds up those three lines.

In unincorporated places such as Castaic and Stevenson Ranch, plumbing permits come from LA County Public Works and its Santa Clarita Valley office instead. The county’s fee schedule for plumbing permits, in effect since July 1, 2026, prices replacing water piping in a building at $10.11 per fixture, plus $41.35 to issue the permit. Either way, the permit is pulled when the city or county requires one, and the work is inspected under it.

Repiping in Newhall, Valencia and Canyon Country

Kirk’s crew repipes homes across the valley, from Newhall and Valencia to Canyon Country. Across the City of Santa Clarita the median home was built in 1987, according to the Census Bureau’s American Community Survey for 2020 to 2024, so about half of the city’s homes are close to 40 years old or older; in Newhall’s ZIP code 91321 the median goes back to 1978. A house that age may still have its original supply pipes, and the first pinhole leak is a good moment to ask how much life they have left.

To price a repipe for your house, call the shop and describe the leaks you have had.