Budget roughly 8,000 to 16,000 dollars for a typical single-family PEX repipe in Orange County, with a wide published band of 4,000 to 18,000. The low end comes from repipe specialists on simple homes, the high end from recent Orange County contractor pages. These are summaries of published guides, not quotes. The wider repipe topic sits on the whole-house repipe page.
What does a whole-house PEX repipe cost in 2026?
For a two-bathroom house, published guides start near 4,000 and stretch past 13,000, with stops at 5,500 to 11,000 and 10,000 to 13,000 along the way. A recent Orange County contractor page lands at 13,000 to 18,000 with a typical job near 15,800. Scope, access and patching explain the gaps.
Why the spread? A specialist who only repipes, working in a single-story crawl-space home, can price low. A general plumber quoting a two-story slab house with drywall repair and paint prices high. Each bathroom beyond the first adds roughly 2,500 to 3,500 dollars on one Orange County guide. That is why a short, itemized quote beats a headline number.
Materials are only part of the bill. The rest is labor, access cuts, the permit, inspection and wall repair.
How much more does a copper repipe cost than PEX?
Guides put PEX 30 to 50 percent under copper, and one Orange County page says copper adds about 55 percent. Two-bathroom copper figures run 8,000 to 15,000 on one site and 12,000 to 22,000 on another. Orange County copper jobs of any size span about 8,000 to over 30,000.
| Item | PEX guide range | Copper guide range |
|---|---|---|
| Two-bathroom house | $4,000 to $18,000 | $8,000 to $22,000 |
| Orange County whole-house, any size | $5,000 to $18,000+ | $8,000 to $30,000+ |
| Added per extra bathroom | About $2,500 to $3,500 | Higher |
Copper's price swings with the metal market, which is one reason quotes carry a short expiry date. The long-form comparison, including durability, is on PEX versus copper.
What drives the price up or down?
Fixture count, house size, one or two stories, slab or crawl space, wall condition, and how much drywall and texture repair is included. Hard-to-reach runs, old galvanized or polybutylene to remove, a second water heater, a new pressure regulator or shutoff valves, and the permit all add. Easy access and fewer fixtures pull it down.
Put the same questions to every bidder: how many fixtures count, whether new shutoffs and a regulator are in, who handles patching and texture, whether permit and inspection are priced, and what the written warranty covers. A bid that skips patching can look a couple thousand dollars cheaper than one that includes it.
Pressure matters here. High supply pressure from hillside tracts is why plumbers like to fit a regulator at the same time. Fitting one adds a modest amount and protects the new lines. Regulator pricing is in water pressure regulator installation cost.
Is PEX as good as copper for water flow?
Roughly comparable in practice, with caveats. Pipe for pipe, PEX has a slightly narrower bore than copper, so plumbers may upsize the main runs or use a manifold that gives every fixture its own line. PEX flexes around corners, with fewer fittings, and that reduces friction loss. Both work well when sized properly, and I would not choose on flow alone.
No honest chart exists without knowing pipe size, length and fittings, so be wary of one that shows a single winner. Ask the plumber how the main and branch sizes were chosen, and whether the design meets the California Plumbing Code. Pinholes in copper are a known problem in some water chemistry, which is one reason many owners now choose PEX.
What is the price to swap out polybutylene?
Costs track the same repipe ranges, since the job is a whole-house repipe, with extras where the pipe is also on the water heater or buried in a slab. Polybutylene went into houses from about 1978 until the mid 1990s, so some homes of that era have it. The old class-action replacement program closed long ago, so owners pay themselves.
Details are in replacing polybutylene pipe for how to identify it and what to expect, and galvanized pipe replacement for the other old material. A slab leak raises a separate choice, spot fix or full replacement, weighed up in slab leak repair or repipe.
What would a mobile home or a small house run?
Smaller homes cost less in materials and labor, though setup costs keep a floor under the price. A published, verifiable figure for mobile homes did not turn up in my search, so ask for a quote. Their plumbing often runs beneath the floor, which can make access easier but exposes lines to weather.
Pages on installing plumbing under a mobile home and mobile home winter plumbing cover the related work. A permit and inspection are normally part of a repipe in any home. Search the contractor in the CSLB database, and remember the deposit ceiling for home improvement work: a thousand dollars or ten percent, the lower one.
Common questions
How do I line up two repipe bids fairly?
Compare scope line by line: fixtures covered, pipe type and size, shutoffs and regulator, wall patching, permit, warranty. A lower price that omits drywall repair is often higher in the end. Ask about the schedule too, since the taps are dry for stretches each day, and about who cleans up.
Is paying in installments normal?
Many contractors bill in stages: at the start, after the rough-in inspection, and at completion. Deposits for home improvement work may not exceed the lower of 10 percent or $1,000, so question anyone asking for more up front. The payment schedule belongs in the contract.
Does insurance cover repiping a house?
Usually not, since a repipe replaces aging pipe. If a sudden leak damaged the home, the water damage might be covered under some policies while the pipe itself is not, so read yours. Some insurers surcharge or decline homes with polybutylene, which can make pricing a repipe worthwhile.
How many days will the PEX repipe run?
Published guides give one to three days for a full repipe (Hydroworks) and two to four days for a two-bathroom copper job (Repipe1), with patching, inspection and permit lead time on top. A two-story slab home sits at the long end. Request a plan that lists each day.
Can I drink from PEX plumbing?
PEX sold for plumbing is printed with drinking-water standard markings and is accepted under the California Plumbing Code. Look for those markings on the pipe being used, and ask the plumber which fittings go with it and how they are rated for drinking-water use.
The rest of our guides start from Capistrano Plumbing.
Sources
Updated