Los Angeles · Los Angeles County
Whole-House Repiping in Los Angeles, CA
Repiping in Los Angeles most often means replacing original galvanized steel supply lines in homes built before about 1950. The pipe rusts shut from the inside, so pressure drops at every fixture and the first water of the morning runs discolored. Raised foundations make many of these homes easier to repipe than slab houses.
- Independent local pros
- Free referral, no obligation
- You approve the price before work starts
What is different about whole-house repiping in Los Angeles?
In a bungalow or Spanish-style house with a crawl space, new lines can be run under the floor and up into the walls with relatively few openings. In a slab-on-grade tract home the reason for repiping is different, usually repeated copper slab leaks, and new lines are routed overhead through the attic and down the walls.
Los Angeles water is hard, which influences material choice and what happens afterward. Both copper and PEX are used here; ask the contractor which they propose and why. New pipe will not stop scale forming in the water heater and fixtures, so a repipe is a good moment to ask about the heater's condition too.
From the Los Angeles plumbing guide
Galvanized pipe at end of life
Original galvanized supply lines in prewar homes rust shut from the inside, which causes low pressure at every fixture and discolored water first thing in the morning.
What to check and ask before work starts in Los Angeles
- Ask whether the quote includes the main line from the meter to the house
- Ask which material is proposed and how lines will be routed
- Ask whether drywall and stucco patching are included
- Verify the C-36 license and ask who pulls the Building and Safety permit
Licensing and permits for whole-house repiping in Los Angeles
Plumbing contractors in California are licensed by the Contractors State License Board under the C-36 classification, and the license can be checked on the board's website. In the City of Los Angeles, permits for water heaters, repipes, sewer work and gas piping are issued by the Department of Building and Safety. Property owners are generally responsible for the sewer lateral all the way to the connection at the city main.
Keystream Plumbing is a referral service. We do not perform plumbing work or hold a contractor license. The independent plumber you are connected with is responsible for licensing, permits and the work itself.
What the job usually involves
The steps are the same in Los Angeles as anywhere; the local conditions above change how each one is done.
- Inspect and plan
- Permit and protect
- Install new lines
- Patch and inspect
Whole-House Repiping questions from Los Angeles
How do I know if my Los Angeles home has galvanized pipes?
Look at exposed pipe at the water heater or under the house. Galvanized steel is gray, has threaded joints and a magnet sticks to it; a scratch shows silver-gray metal. Homes built before about 1950 that have never been repiped usually have it.
Do I need a permit to repipe a house in Los Angeles?
Yes. In the City of Los Angeles a repipe is permitted through the Department of Building and Safety and inspected. A licensed contractor normally obtains the permit as part of the job.
Sources
- Water quality and water sources, Los Angeles Department of Water and Power
- Hardness of water, US Geological Survey
Local information reviewed October 1, 2026. Rules and programs change; confirm details with the agency before you rely on them.
More plumbing help in Los Angeles
Whole-House Repiping in other cities
Ownership rules, soil, water and pipe materials make this a different job from one city to the next.
Related guides: How to Prevent Frozen Pipes in Winter, Low Water Pressure: Causes and Fixes, How Plumbers Price Jobs: What You're Paying For.
Need whole-house repiping in Los Angeles?
Call (833) 520-4758. Same-day service is often available; call to check timing.