Published price guides for Southern California show PEX repipes of a typical house between $4,000 and $10,000, with copper between $8,000 and $18,000. Homes with three or more bathrooms can pass $15,000. None of that is a quote. This page shows the breakdown, then points to the repipe guide that explains the work itself.
What does a whole house repipe cost by number of bathrooms?
Bathroom count is the quickest estimator, because it tracks fixtures and pipe length. Published Southern California guides give PEX at about $3,500 to $6,500 for one bath, $4,000 to $8,000 for two, $6,000 to $10,500 for three and $8,000 to $14,000 for four. Copper runs roughly 40 to 60 percent higher.
| Bathrooms | PEX (guide range) | Copper type L (guide range) |
|---|---|---|
| 1 | $3,500 to $6,500 | $6,000 to $10,000 |
| 2 | $4,000 to $8,000 | $8,000 to $14,000 |
| 3 | $6,000 to $10,500 | $12,000 to $18,000 |
| 4 | $8,000 to $14,000+ | $16,000 to $25,000+ |
Every house is different, so use the table to start a conversation, not end one, and have each plumber itemize the quote on paper. A second sanity check is per fixture: guides land between $500 and $1,500 each, and a three-bedroom, two-bath home has a dozen or more.
What does repiping a two-thousand-square-foot house run?
A house that size usually has two to three bathrooms. One California guide shows PEX at $5,900 to $8,600; another reaches $14,000 for a larger 2.5 to 3 bath home. Copper in the same house commonly doubles those figures. The gap comes down to access and fixture count.
The square footage itself is a weak driver, and no dependable per-square-foot price turned up, so fixture count is the better yardstick. A compact home with bathrooms stacked back to back costs less than a sprawling single-story with fixtures at every corner, because the plumber buys and runs less pipe. Ask how many fixtures the quote assumes, and whether it counts hose bibs, the water heater, ice maker and washer box.
What about a smaller fifteen-hundred-square-foot house?
Homes of 1,500 square feet are often one or two bathroom bungalows, putting PEX near $3,500 to $8,000 by the bathroom counts above. Plenty of Santa Ana houses built between the twenties and fifties are this size, and they are the ones likeliest to have galvanized steel in the walls. A smaller floor plan does not promise a smaller bill.
Older homes can raise the price through hidden conditions: plaster walls instead of drywall, narrow framing, original cast iron drains that must be tied into, and a water heater closet that needs updating to current code. The article on replacing plumbing in an old house lists those surprises.
How much more does it cost if the house is on a slab?
Published guides do not give a reliable slab surcharge, so I will not invent one. What changes is the route: with no crawlspace, the plumber runs new lines through walls and the attic instead of under the floor, or locates the leak and repairs it. Get both options priced separately, and read the comparison in slab leak repair or repipe.
Routing through the attic is common in Southern California because attics are accessible and the walls need only small holes. The slab itself is left alone unless the plumber is repairing a leak beneath it. When the trouble is a single leak instead of tired pipe throughout, a spot repair is cheaper, and a pinhole in copper is described in the pinhole leak repair guide.
What is the cheapest sensible way to repipe?
PEX is the lowest-cost full repipe: the tubing bends, goes in fast and costs little, and because labor dominates, speed saves real money. A partial repipe, replacing only the worst section such as a bathroom branch or the lines to the water heater, costs less still. Cutting out drywall repair or doing the patching yourself saves more.
Three honest cautions. A partial repipe leaves old pipe in place, so test pressure and check what remains. Ask whether the quote includes drywall patching and paint; guides treat them as usually extra. And choose a PEX fitting system you can service, which PEX versus copper and the PEX A or B guide discuss. Santa Ana tap water is hard, about 15 grains per gallon by the City, and it scales copper and fittings over decades.
How much does a polybutylene or small-job repipe cost?
If your house still has gray polybutylene pipe, the repipe is the cure and the price follows the tables above. A bathroom-only repipe or a few fixtures costs a fraction of a whole house, though per-fixture pricing is higher on small jobs. Our guides on polybutylene replacement and its costs explain.
Which parts of the bill are labor, materials and permits?
Labor is the largest piece; one guide puts it near seventy percent. Material runs roughly $0.40 to $2 per foot for PEX and $2 to $8 per foot for copper in the guides I checked. Permits and inspections add a line, and drywall repair is usually extra. A plumbing permit is part of the job; ask the plumber to confirm who pulls it.
How inspections work is in how to pull a plumbing permit, and the city's Building and Safety division is the office to contact. A plumber with the right contractor license can pull the permit, and the CSLB lookup shows whether the plumbing classification is active.
Common questions
What signs say the pipes are finished?
There is no fixed schedule. Watch for rusty or discolored water, falling pressure, repeated pinhole leaks, green stains at joints or flaking on galvanized pipe. Age alone is a poor guide, since lifespans depend on the metal, the water and the installation. A plumber can inspect, pressure test and tell you what is left.
Is repiping a difficult job?
It is a major plumbing job, nothing like a weekend project. Work commonly takes a few days, the water is shut for stretches, and walls and ceilings get opened in places. Almost no one does it themselves, and it should not be a DIY project because of permits and the risk of hidden leaks.
Can a house be repiped without tearing out walls?
Mostly, yes. PEX is flexible enough to fish through walls and attics with small access holes, and the holes get patched afterward. Plaster walls and tight framing make it harder. Ask the plumber where openings will be, how many, and whether patching and painting are in the price.
Does repiping add value?
It removes a known worry for a buyer or an insurer, especially with polybutylene or galvanized pipe, but no reliable resale figure for this area turned up. Think of it as protecting the house, not as an upgrade. Keep the permit record and invoice; they answer the inspector's question.
What drags down a home's value the most?
Hidden major defects tend to hurt most: foundation and structural trouble, roof failure, water intrusion and failing systems. Plumbing alone rarely heads that list, though ignored leaks breed mold and rot. No source I found ranks the causes, so ask a local real estate professional.
What do plumbers actually charge for a whole-house repipe?
Most published figures for the region sit in the middle thousands for PEX and roughly double that for copper, higher on large homes. Collect two written quotes, look up each plumber's record on the contractor board's site, and insist that scope, materials, patching and permits are itemized.
Budget sorted? plumber in Santa Ana explains the rest of the job.
Sources
- City of Santa Ana, water quality FAQs
- California Contractors State License Board, consumer hiring guidance
- Published Southern California repipe price guides, checked November 2026
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