One published contractor guide puts a whole-house repipe at $3,500 to $14,000 in PEX and $7,500 to $28,000 in copper for houses from 1,000 to about 2,200 square feet. Size, pipe material and access set the final figure. A figure for your own house starts with the quote form, and the rest of the services are on the Capistrano Plumbing home page.
What is a realistic budget for an older home?
The same guide lists a 1,500 square foot house with two baths at $5,500 to $11,000 in PEX and $12,000 to $22,000 in copper, and larger or multi-story homes cost more. Treat all of it as background, since the plumber who walks through the house sets the real price.
Per square foot, the guide quotes PEX at $3.50 to $7.00 and copper at $8.00 to $14.00. Treat that as a sanity check on quotes, not as a price tag.
Which parts of an older house make the bill climb?
Access, size and material drive the number. A one-story home with attic or garage routes is cheaper than a two-story with finished ceilings, and copper runs far above PEX. Bathroom count, plaster versus drywall walls, and whether the heater connection and main valve also need work all add to it.
Think of the quote as five buckets:
| Bucket | What sits in it |
|---|---|
| Pipe and fittings | PEX or copper, manifolds, valves, hangers |
| Labor | Hours to route lines and make connections |
| Permit and inspection | City fee plus the plumber's time for the inspection |
| Wall and ceiling repair | Often priced apart from the pipe work |
| Extras | New shutoff valves, a pressure regulator, a new heater connection |
A cheap bid that leaves out the fourth bucket can cost more overall than a dearer bid that covers it, so find out what each one omits.
How old is old enough that the pipes are a problem?
Age alone settles nothing; the material matters more. Two usual reasons to replace are polybutylene, a gray plastic that was fitted in many US houses between about 1978 and 1995, and galvanized steel that has corroded. Copper can last decades yet may start to pinhole. A plumber can read pressure, inspect fittings and report on yours.
Mission Viejo grew as a planned community starting in the 1960s, so the housing stock spans several pipe eras across the same few miles. Two neighbors on the same street can have different pipe. Two companion pages cover the problem materials, replacing polybutylene and replacing galvanized pipe, while why homeowners repipe covers timing. For the PEX route specifically, see PEX repipe pricing.
Do you have to replace everything, or only part of the plumbing?
Not always. One failing branch, say the kitchen and a bathroom, can be replaced while sound pipe stays. That costs less now but leaves older pipe working and may mean opening walls again later. A full job is the better fit when the same failing material runs through the entire house.
Questions that decide it:
- Is the failing pipe a type known for trouble, or is it a one-off leak?
- Are leaks popping up in different rooms, one after another?
- Are the walls already open for a remodel? Then the repipe is cheaper to add.
- Does your insurer treat the material as a risk? One source notes many carriers flag or decline homes with polybutylene still in service.
The wider cost view, including repipe ranges by material, is in the repipe cost guide.
What do quotes usually leave out?
Quotes often omit drywall repair and paint, permit fees, a new pressure regulator, shutoff valves and any change at the water heater. No sourced figure for wall repair or permits is printed here, because both depend on how much wall is opened and on the city. A clear quote names each item and who handles it.
Compare bids line by line. The same scope should appear in every quote: fixture count, material, wall repair, permit, cleanup. If one bid is far lower, find out what is missing before treating it as the winner.
What should you check before signing a repiping contract?
Look up the contractor at CSLB, confirm who pulls the permit, and get the payment schedule on paper. California insists on a contractor license from $1,000 of work, and caps a home improvement deposit at the smaller of $1,000 and a tenth of the price. Paying everything up front is the mistake to avoid.
The City of Mission Viejo's Building Services Division handles plumbing permits and inspections for repiping. Pulling a permit protects you on resale and with insurers. A plumbing inspection before you decide can show whether replacement is needed at all, and the plumber can say what it costs to assess.
Common questions
For how many days is the house disrupted?
The published guide lists one or two days for a small house and three to five for a larger one, with drywall patching and paint afterward. Two stories and tight access add time. Water is off at intervals, so ask for the schedule and a plan for the meantime.
What belongs in a written replumb quote?
License number, type and brand of pipe, how many fixtures, what the price includes and excludes, who patches walls, the permit, and when payments fall due. Gather two or more written quotes for identical work and compare line by line.
Must I stay home while pipes are replaced?
You or someone you trust should, because the plumber needs every room and every sink cabinet and may need routing decisions. Expect noise, dust and water off for hours. Clear belongings away from walls where access holes will be cut.
Can I replace only the polybutylene or galvanized pipes?
Often, yes. If other pipes are in sound condition, a plumber can replace the problem lines and tie into the rest. Mixed metals and old fittings can cause trouble, so the plumber should say how connections will be made. A partial job may still require a permit.
Is a remodel the cheaper moment to replumb?
Usually, since walls are already open and some labor overlaps. The saving depends on timing and on who coordinates the trades. With a bathroom remodel coming, read the remodel plumbing guide before walls close, and have the repipe priced as an add-on.
Sources
Updated