Plumber in Newhall, Santa Clarita

One of the valley’s first towns

Newhall is one of the valley’s earliest settlements. The county’s area plan dates it to 1876 and the building of the Southern Pacific Railroad: Henry Mayo Newhall deeded the railroad land for a depot and a town to be called Newhall. The plan notes that Old Newhall was once the largest community in the valley, and it places Old Town Newhall, where the town’s businesses cluster, along Lyons Avenue and Main Street.

Newhall was a founding community of the City of Santa Clarita in 1987, together with Saugus, Valencia and Canyon Country. Not all of it is in the city: Supervisor Barger’s list of unincorporated areas still includes a portion of Newhall, and in the Census Bureau’s 2020 boundary file about half of ZIP 91321’s land, 34 of its 69 square kilometers, lies outside any city. For a plumbing job, that line decides which office issues the permit; the city’s Residency Status Verification Tool, linked from its annexations page, tells you which side an address is on.

Plumbing in older Newhall homes

The Census Bureau’s 2020 to 2024 estimates count 6,103 of the 11,338 homes in ZIP 91321, or 53.8%, as built in 1979 or earlier, a higher share than in any other Santa Clarita Valley ZIP code. About three in four (73.3%) went up before 1990, and the median home dates from 1978.

In a house from the 1970s, the supply pipes in the walls, the drain lines under the floor and the sewer lateral out to the street may all be the ones it was built with. A first pinhole leak in an old supply pipe is a fair moment to ask how much life the rest of the pipe has left; repiping covers replacing it, in part of the house or all of it. A drain that stops again soon after it was cleared calls for a look inside the line: drain cleaning opens it, and a camera shows whether roots, a crack or a sag is the cause.

The water heater is rarely original. A tank water heater lasts 8 to 12 years on average, so a house built in the 1970s has likely been through several, and the next one goes in under today’s code, with the earthquake strapping California requires. Water heater replacement covers the swap and the permit, and water heater repair the fixes that keep a younger tank going.

Sewer laterals in Newhall

The lateral carries everything that leaves the house to the public sewer, and in an older Newhall home it can be as old as the house. How much of it is yours can depend on the side of the city line. In the city, the city’s 2025 sewer management plan runs your share all the way to the public sewer, connection included; only a clean-out in the sidewalk, or one no more than 2.5 feet from the property line, cuts it short at that clean-out. In the county part of Newhall, LA County makes the owner responsible for the full length of the lateral, under the street as well.

The city’s public sewers are old too: about half of its 500 miles of sewer lines, 255 miles, went in between 1960 and 1979, and the system is predominantly vitrified clay pipe. Sewer line repair walks through the camera inspection, a section repair and the permit. If sewage is coming out of a manhole or running down the street, the public sewer may be the problem: LA County Public Works takes those calls at (800) 675-4357.

The 1994 fixture rule

California’s SB 407 covers homes built on or before January 1, 1994, and in ZIP 91321 nearly three homes in four were built before 1990, so most homes there fall under it. What the law asks when a room is altered, and which fixtures count as non-compliant, is set out on plumbing repair, which also covers the toilet, faucet and shower work itself.

Permits and fees for Newhall jobs

Permits follow the address. The city issues a water heater changeout and a repipe as instant online permits for homes, and the county takes simple residential jobs, a water heater replacement among them, as express permits filed online. These are the fees each office publishes for three jobs; neither schedule prints a total, so the totals below add up the items.

The permit is pulled when the city or county requires one.

Water in Newhall

Newhall ran its own water long before the city existed. SCV Water’s history dates the Newhall Water System to 1913; after it became the Newhall Water Company in 1930, it served 300 customers from six wells, with a 360,000-gallon redwood tank 250 feet above the town’s business district as its only storage. Voters formed the Newhall County Water District on January 13, 1953, and in 2018 it joined the valley’s other suppliers to become SCV Water.

Newhall’s water now comes from SCV Water as a blend of imported state water and local groundwater. In SCV Water’s 2026 report, the groundwater averaged 354 mg/L and the imported water about 160: very hard and hard, by the US Geological Survey’s classes, and hard water is what leaves scale in water heaters and pipes. Newhall falls under the valley-wide softener ban, city and county parts alike: automatic salt-based softeners are not allowed. The softener ban has the details, and water softeners compares the options allowed for scale. SCV Water’s 2024 inventory of service lines, the pipes that bring water from the street to each home, covered homes built before 1986, and SCV Water reports that it found no lead in its system.

For a leak, a slow main line or a water heater at the end of its life in Newhall, call the shop. Kirk’s crew also covers Valencia, Saugus, Stevenson Ranch and the rest of the valley, town by town, on the Santa Clarita Valley page.