How much does a whole-house repipe cost in 2026?

A 1,500 sq ft, 2-bath home runs $4,500 to $8,000 in PEX or $7,500 to $12,000 in copper. A 2,500 sq ft, 3-bath home runs $6,500 to $11,000 PEX, $11,000 to $18,000 copper. Add 30 to 50% for slab-on-grade access and budget $800 to $3,000 separately for drywall repair after the plumbing inspection passes.

When do I actually need a whole-house repipe?

You need one if you have galvanized steel pipe (1900s-1960s homes), polybutylene (1978-1995, often gray plastic), recurring pinhole leaks in old copper, repeated slab leaks in a sun-belt slab home, or a failed insurance inspection on an aging system. If none of these apply, the rest of the system is probably fine and a full repipe is overkill.

PEX or copper for a 2026 repipe?

PEX-A is the right call for most homeowners — 50+ year design life, freeze-resilient (it expands instead of bursting), code-approved under both UPC and IPC, and roughly half the install cost of copper. Copper Type L still has the longest track record but costs $8 to $12 per linear foot installed and is vulnerable to bad water chemistry.

How long does a whole-house repipe take?

Three to seven days of actual work. Day 1 is demo and access cuts, days 2 to 4 are installation and pressure testing, day 5 is the plumbing inspection, days 6 and 7 are drywall patching. Water is off most of those days — plan to shower elsewhere and budget for takeout meals during the install.

Will my insurance cover repiping a polybutylene home?

Most carriers will not insure polybutylene homes at all in 2026 — they decline coverage outright or write the policy with a water-damage exclusion. Replacing PB with PEX or copper restores normal coverage. Check with your carrier before buying a PB-piped home; the repipe quote is part of the negotiation when you are buying.

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Whole-House Repipe in 2026: Cost, Timeline, and What to Expect

Q: Do I need a permit for a repipe?

Yes, almost everywhere. A whole-house repipe touches every wet wall and every fixture, which is well beyond any "minor repair" exemption. The permit should be pulled in the plumber's name, not yours. The inspection includes a code-required pressure test held at 100 psi (or 1.5x working pressure) for at least 15 minutes per UPC 609 / IPC 312.

By Brian WilliamsPublished April 27, 202611 min read

A whole-house repipe runs $4,500 to $15,000 depending on home size, pipe material, and access. Here is when you actually need one, PEX vs copper vs CPVC, and how to hire it out.

If you are pulling rust-colored water out of the kitchen tap, watching your shower pressure drop year after year, or you just got an insurance non-renewal letter mentioning "polybutylene," you probably need a whole-house repipe. I have walked a few firefighter buddies through this on their own homes, and I have priced it on a rental I owned with 1962-vintage galvanized steel that was basically a clogged artery at that point. So here is the real version of what it costs in 2026, what the trades actually do for the money, and how to not get hosed.

Quick answer

Cost range: $4,500 to $15,000 for most homes. Big or hard-to-access homes push $20,000+.

Timeline: 3 to 7 days of actual work. Water off most of those days.

Signs you need one: galvanized steel pipe, polybutylene (1978-1995), repeated pinhole leaks in copper, recurring slab leaks, or a failed insurance inspection.

Who does it: a licensed plumbing contractor, pulling the permit in their name, with a posted pressure test and final inspection.

Best material for most 2026 jobs: PEX-A. It is freeze-resilient, fast to install, code-approved everywhere, and it is what I would put in my own house.

If you just want a ballpark for your square footage, our plumbing cost calculator will get you in the right zip code in about 30 seconds.

What "whole-house repipe" actually means

A repipe replaces all the supply lines in your house, the pressurized pipes that carry hot and cold water from the main shutoff out to every fixture. That is the trunk (the main run from the water heater and main), the branches (the lines that peel off to bathrooms and the kitchen), and the risers (the verticals that come up out of the floor or down out of the ceiling to each fixture).

A repipe does not include your DWV system. That is drain, waste, and vent: the larger black or white pipes that carry sewage out and let air in. DWV is a totally separate scope, and the failure modes are different (cast iron rotting from the inside, ABS or PVC cracking at hubs). If your plumber tells you the drains "should probably go too," that is a different bid.

A typical repipe scope includes:

New cold and hot supply throughout the house

New shutoffs at every fixture (these are usually shot anyway)

New connections at the water heater

New main shutoff, often relocated to be accessible

Pressure test, inspection, and a basic drywall patch in the access cuts

What it usually does not include, even though plumbers will quote them as adders: drywall finish and paint, water heater replacement, water softener tie-in, hot water recirculation pump, and any fixture replacement. Budget those separately or ask your plumber to roll them in.

The drywall damage is real. Repiping a finished house means cutting access holes at every wet wall, every ceiling penetration, and behind every shower valve. You should expect 15 to 40 patches even on a clean job.

When you actually need a repipe

There are five honest triggers. If you do not have one of these, you probably do not need a full repipe.

1. Galvanized steel pipe (mostly 1900s through about 1960)

Galvanized steel was the standard supply pipe in American houses for decades. The zinc coating wears off from the inside, the steel rusts, and the rust scales build up until your 3/4 inch pipe has a 1/4 inch opening. Tells: rust-colored water on the first draw of the morning, pressure that drops to a trickle when two fixtures run, hot water way worse than cold (heat accelerates corrosion). If your house was built before 1965 and nobody has repiped it, assume galvanized until proven otherwise.

2. Polybutylene (1978 through 1995)

Polybutylene, often gray or sometimes blue, was the cheap miracle plastic of the late 70s and 80s. It turns out chlorine and chloramines in municipal water react with it, and the acetal fittings get brittle and blow out. The class-action settlement (Cox v. Shell Oil) closed in 1995, and the claim window is long since expired. The brand name you will hear most is "Quest" plumbing, made by U.S. Brass.

The kicker in 2026: a lot of insurance carriers now decline coverage on PB homes, or they will write the policy but exclude water damage. That alone makes the repipe pencil out.

3. Old copper with pinhole leaks

Copper is supposed to last 50+ years, and most of it does. When it fails early, it is almost always a water chemistry problem: aggressive chloramines from the municipal supplier, low-pH well water, or stray current from a bad ground. If you are patching a pinhole every six months, the rest of the system is on the same clock. A repipe is cheaper than 15 more patches and a flooded kitchen.

4. Recurring slab leaks

In sun belt slab-on-grade homes (think Phoenix, Vegas, Houston, Florida), the supply lines run under the slab. When copper buried in concrete starts leaking, locating and patching one leak is $2,000 to $4,000 and there will be another one. The standard fix is to abandon the slab lines, run new PEX through the attic, and drop down to each fixture. That is a repipe.

5. Lead service line replacement

Technically the service line (street to house) is a separate scope from the in-house repipe, but they often get timed together. Under the EPA's Lead and Copper Rule Improvements (LCRI, finalized in October 2024), water utilities must identify and replace all lead service lines within 10 years, with the replacement clock generally running to 2037. If your utility is replacing the public side, that is the cheapest moment to handle the private side and to repipe the rest of the house.

Material comparison

MaterialInstalled costLifespanProsCons PEX-A (Uponor / Wirsbo)$4 to $8 / linear ft50+ yrFreeze-resilient, expansion fittings, fast installHigher material cost, needs Uponor tool PEX-B$3 to $6 / linear ft50+ yrCheapest, widely available, crimp/clamp fittingsStiffer, fittings restrict flow more Copper Type L$8 to $12 / linear ft50+ yrLongest track record, rigid, can run exposed2x the price, slow to install, vulnerable to bad water chemistry CPVC$5 to $8 / linear ft30 to 50 yrCheap, freeze-resistant, no metallic tasteBrittle with age, glue joints, restricted in some chloramine systems Galvanized steeln/an/aNoneNever reuse. Period.

PEX is approved under both the Uniform Plumbing Code (UPC, used in most of the western US) and the International Plumbing Code (IPC, used in most of the eastern US and the southeast). The relevant standards if you want to verify on your spec sheet:

ASTM F876 and ASTM F877: the base PEX tubing standards

ASTM F1807: copper crimp ring fittings (PEX-B)

ASTM F2080: cold-expansion fittings with PEX reinforcement rings (PEX-A / Uponor)

ASTM B88: copper Type K, L, M

Type L is the standard for residential supply. Type M is thinner and cheaper but several jurisdictions disallow it for new work. Type K is overkill for inside the house.

Cost by home size

Home sizePEX repipeCopper repipe 1,500 sf, 2 bath$4,500 to $8,000$7,500 to $12,000 2,500 sf, 3 bath$6,500 to $11,000$11,000 to $18,000 3,500+ sf, 3 to 4 bath$9,000 to $18,000$16,000 to $30,000

Add-ons and modifiers, every one of which is real:

Slab-on-grade access penalty: +30 to 50%. Running through attic and dropping walls takes longer and creates more patches than a crawlspace job.

Two-story: +15 to 25%. More risers, more access cuts, more ceiling work.

Drywall repair (separately budgeted): $800 to $3,000 typical. Texture matching on a 1985 popcorn ceiling will cost more.

Plumbing permit: $100 to $400 in most jurisdictions. Some add a per-fixture fee.

Water heater swap on the same trip: $1,800 to $3,500 for a standard tank, more for tankless or heat pump. If your tank is 10+ years old, do it now.

Hot water recirculation loop: $400 to $1,200 added to the repipe scope. Way cheaper now than a retrofit later.

Expansion tank: $150 to $400 installed. Required almost everywhere when you have a closed system (check valve or backflow preventer at the meter).

Pressure reducing valve (PRV): $400 to $800 if your static pressure is over 80 psi. Required by code in most places when incoming exceeds that.

The 3 to 7 day project

Most repipes I have seen run on this rough schedule:

Day 1: Demo and access cuts. Water off. The plumber maps the runs, cuts every access hole, and pulls the old pipe where they can.

Day 2 to 4: Install. Trunk goes in first, then branches, then drops to fixtures. Hot side first usually because it has more turns.

Day 4 or 5: Pressure test, then inspection. Pressure test is required by code (UPC 609 / IPC 312). The plumber pressurizes the system to either 1.5x working pressure or 100 psi, whichever is greater, and holds it for 15 minutes minimum (most inspectors want the gauge to be steady when they show up). Cross-connection control and hose bib vacuum breakers get checked at the same inspection.

Day 5 to 6: Drywall patch. Hung, taped, mudded.

Day 6 to 7: Final mud sand, prime, paint touch-up if your contract includes it.

You will be without water during demo and most of the install. Plan to shower at a friend's place, fill some jugs for the toilets, and budget for a few takeout meals. A good plumber will leave you with at least one working fixture overnight whenever they can.

If you are also replacing a water heater or doing connected work, see our water heater permit guide before you start. And if the repipe overlaps with a bathroom remodel (it often does, since you are already in the walls), the bathroom remodel permit guide covers what gets pulled together.

Permits and inspections

Almost every jurisdiction requires a plumbing permit for a repipe. The handful of edge cases (small repairs, like-for-like replacement of a single fixture) do not apply when you are touching every wet wall in the house.

The permit should be pulled in the plumber's name, not yours. If a contractor asks you to pull it as the homeowner, that is a red flag. They are doing it to hide a license problem or to dodge liability. Walk away.

Required code items on a typical inspection:

Pressure test held at 100 psi (or 1.5x working pressure) for the inspector

Approved materials stamped with the right ASTM number

Proper support spacing (PEX needs more support than copper, generally 32 inches horizontal)

Sleeves at slab and exterior wall penetrations

Cross-connection control on hose bibs and any direct-fill connections

Shutoffs accessible at every fixture and at the main

PEX-A vs PEX-B: the actual answer

The "PEX is plastic and it will fail" take is mostly people who got burned by polybutylene 25 years ago and never updated. PEX is not PB. The chemistry is different (cross-linked polyethylene, the "X" in PEX). Modern PEX has 50+ years of design life, real freeze tolerance (it expands instead of bursting on the first hard freeze), and a track record going back to European installs from the 1970s.

PEX-A vs PEX-B for 2026:

PEX-A uses cold-expansion fittings (Uponor / Wirsbo). You expand the pipe with a tool, slide it over a brass barb, and it shrinks back down. The fitting ID is the same as the pipe ID, so flow is uninterrupted. Most freeze-tolerant of any PEX.

PEX-B uses crimp or clamp rings around an insert fitting. The insert reduces the inside diameter of the pipe at every fitting, which costs you a bit of pressure on long runs with lots of turns.

Both meet code. PEX-B is cheaper. PEX-A is what I would put in my own house, and it is what most pros are installing on premium repipes in 2026.

How to hire it out

1. Licensed plumbing contractor only. Verify the license on your state board's website. A repipe is not a handyman job.

2. Get 2 to 3 quotes. They should be in the same ballpark. If one is half the price of the others, that is the one to be suspicious of.

3. Permit in the plumber's name. Non-negotiable.

4. Ask about access plan. Hidden (in-wall) vs surface mount. Most homeowners want hidden. Surface-mount basement runs are fine and save money.

5. Wall-patch scope. Get this in writing. "Patch and texture" is different from "patch, texture, prime, and paint." Most plumbers stop at the mud, and a separate drywall/paint crew finishes.

6. Warranty. Expect 10 to 25 years on workmanship from the contractor. Manufacturer warranty on PEX-A is usually 25 years on the tubing.

7. Proof of insurance. General liability and workers' comp. Ask for a current certificate.

8. Static water pressure test. Any good plumber will measure your incoming pressure before they quote. If they do not, that is a tell.

Common mistakes I see

Picking copper "for the resale." Buyers do not pay extra for copper. They care that the system works, the inspection passed, and there is no polybutylene anywhere in the house. PEX with a clean inspection sells the house just fine.

Not budgeting for drywall. Half the homeowners I have talked to forgot this line. Add $1,500 to $3,000 to your budget.

Leaving old galvanized "stub-outs." Some cut-rate plumbers will tie new PEX into the last 12 inches of old galvanized at the fixture. That galvanized stub keeps shedding rust and clogs your aerators within a year. Get all of it out.

Skipping the water heater when it is 10+ years old. You are in the walls and the water is off. Doing the heater later means another day without water and another permit fee.

Not testing static pressure. High pressure (above 80 psi) destroys plumbing. It is the single biggest cause of "premature" pipe and fixture failure. Code says 40 to 80 psi. Get a $12 hose-bib gauge and check yours.

Letting the plumber skip the inspection. No inspection means no permit closeout, which means a problem at sale time. Insist on the final.

Bottom line: three things to do this week

1. Identify your existing pipe. Look under a sink, in the basement, or at the water heater. Galvanized is silver-gray and magnetic. Copper is reddish-orange. PB is gray plastic with a copper or brass crimp ring. PEX is red, blue, or white plastic with stamped ASTM numbers.

2. Test your static water pressure. $12 gauge on any hose bib. If you are over 80 psi, you need a PRV regardless of whether you repipe.

3. Get one quote. Even if you are not ready to pull the trigger, a real number from a licensed plumber tells you whether to budget $6,000 or $18,000, and that changes how you think about the next 12 months.

A repipe is a "do it once, do it right" project. The system you put in this year is the one your house will run on for the rest of its useful life. Spend the extra weekend getting smart on it before you sign anything.