Is PEX cheaper than copper for a repipe?

Usually yes, on both counts: PEX costs less per foot and installs faster, so labor is lower too. Copper costs more and takes longer to solder, but some buyers and jurisdictions prefer it. Compare the two on your own per-foot and labor figures with the PEX vs copper tool.

How do I compare two repipe quotes fairly?

Divide each total by the number of fixtures with the cost-per-fixture normalizer. That turns two different scopes into a single comparable dollars-per-fixture number, so you can ask what the more expensive bid actually includes.

Do I need a permit to repipe a house?

In most jurisdictions a repipe is inspected work that requires a permit. Rules vary, so confirm with a licensed plumber and your local building department. Skipping the permit can cause problems at inspection and when you sell.

How Much Does It Cost to Repipe a House?

Q: How much does it cost to repipe a house?

There is no fixed national price. The number is built from your fixture count, your material choice (PEX or copper), your access difficulty and your local labor rate, plus a permit and a contingency. Build your own figure with the repipe calculator using numbers from your quotes, then get itemized written estimates from licensed plumbers.

A whole-house repipe replaces the aging supply lines running to every fixture. There is no single national price, because the number is built from your house, your material and your local labor rate — so the useful question is not “what does it cost” but “what makes my number, and is the quote I was handed reasonable?”

By Francesco Zinghinì

What a repipe actually replaces

A repipe swaps the hot- and cold-water distribution pipes — the lines that feed sinks, tubs, showers, toilets, the water heater, the washer and the hose bibbs. It does not touch the drain, waste and vent (DWV) system; that is a separate job with its own sizing rules (see drainage fixture units). Houses get repiped when galvanized steel rusts closed and pressure drops, when polybutylene or early plastic fails, or when copper develops pinhole leaks. Because the plumber has to reach every run, the real cost drivers are access and fixture count, not the pipe itself.

The four things that move the price

Number of fixtures. Each sink, tub, shower, toilet and appliance is a stop the plumber has to pipe and connect. Cost scales with fixtures far more than with square footage — a compact house with three full baths costs more than a sprawling house with one.
Access. Open crawl spaces and unfinished basements are cheap to work in. Slab foundations, two-story walls and finished drywall mean cutting, fishing pipe and patching — which is often a separate drywall-and-paint bill on top of the plumbing.
Material. PEX is faster to run and cheaper per foot; copper costs more in both material and labor but many buyers still prefer it. The PEX vs copper calculator puts the two side by side on your own figures.
Local labor rate. The single biggest line on most repipe quotes is labor, and rates vary widely by region. This is exactly why PipeCalcs stores no price list — you enter the rate from your own quote.

How to build the number yourself

The whole-house repipe calculator uses a transparent formula:

total = (fixtures × your $/fixture + labor hours × your $/hour + permit) × (1 + contingency%)

Worked example. Take a 12-fixture house at $150 per fixture, 24 hours of labor at $90 an hour, a $150 permit and a 10% contingency. Fixtures come to $1,800, labor to $2,160, plus the $150 permit — a $4,110 subtotal. Add 10% and you land at about $4,521. Every one of those inputs is a number you pull from your own estimate; change the labor rate and the total moves with it. That is the point: the tool models your job, it does not guess at a market price that would be stale a year from now.

Why the contingency line matters

Repipes uncover surprises — a corroded valve, an out-of-code section that the inspector flags, a wall that has to come open wider than planned. A 10% to 20% contingency is not padding; it is the difference between a quote and reality. When you compare two bids, check whether one has quietly folded contingency into the base and the other has not, because that alone can flip which looks cheaper.

Normalize the quotes before you compare

Two plumbers rarely bid the same scope, so a raw total is hard to read. Divide each bid by the fixture count with the cost-per-fixture normalizer and you get a single comparable figure — the $4,521 example above is about $377 per fixture. Now a $6,000 bid and a $4,500 bid become “$500 vs $375 a fixture,” and you can ask the higher bidder what the extra buys (better material, more patching, a longer warranty) instead of assuming they are simply expensive.

PEX or copper?

PEX is flexible, freeze-tolerant, quick to install and needs fewer fittings, which is why it dominates modern repipes. Copper is rigid, long-proven, and preferred by some buyers and in some jurisdictions. On material alone copper can be several times the per-foot cost of PEX, and because it takes longer to solder, the labor is higher too. Run both through the comparison tool with your real per-foot prices and labor figures — it is illustrative math on your numbers, not a verdict, but it makes the trade-off concrete.

How long it takes and what to expect

A whole-house repipe is disruptive but not endless. A typical single-family job runs one to several days depending on size and access, during which the water is shut off for stretches while the plumber cuts over each run. In an open crawl space or basement the crew works overhead and patching is minimal; in a slab or two-story house they open walls and ceilings to fish new pipe, which is why the drywall-and-paint repair afterward is a real line to budget for — sometimes a separate trade entirely. Ask up front whether the quote includes patching or leaves you with open walls, because that single question can explain a large gap between two bids. Plan for the household to be without water for hours at a time, and clear access to walls, the water heater and fixtures before the crew arrives so you are not paying labor for moving furniture.

Repipe or spot repair?

Not every leak means a whole-house repipe. A single pinhole in otherwise sound copper is a spot repair — a coupling and an hour of labor (price it in the plumbing repair calculator). A repipe is the right call when the failures are systemic: galvanized steel that has rusted closed and killed your pressure, polybutylene or an early plastic under a recall, or copper that is developing pinholes in several places because the water chemistry is aggressive. The tell is repetition — when you have paid for the third spot repair in two years, you are financing a repipe in installments. Add up what those repeated repairs have cost against a one-time repipe total from the repipe calculator, and the decision usually makes itself. A repipe also resets the clock on the most failure-prone part of the system, which matters if you plan to stay or to sell.

Get it estimated the right way

Whatever number you build here is a planning estimate, not a bid. Use it to walk into a conversation informed, then get itemized written quotes from licensed plumbers, confirm the material and scope, and make sure the permit and inspection are included — a repipe is inspected work in most jurisdictions, and skipping the permit can haunt a future sale.