Copper repipe cost

Repiping a house in copper costs $8,000 to $22,000, typically around $13,000 for a two-bathroom house. The same house in PEX runs $4,500 to $12,000, so copper carries a clear premium, and nearly all of it is labor: every joint is cut, cleaned, fitted and soldered by hand.

The other thing that moves a copper quote is the walls. Rigid pipe needs straighter routes and more openings than flexible tubing, and every opening has to be closed and finished again before the job is really done.

What it costs

Both repipe figures cover the supply lines from the main shutoff to every fixture, with routine drywall openings and patching. They do not cover drains, the water main from the street, or openings in tile and plaster beyond the usual, which are where the extra-opening line comes in.

Why copper still gets chosen

PEX is the default for most repipes now, and the whole-house repipe guide explains why. Copper is still picked for reasons that are real, if narrower.

Exposed runs. Copper is unaffected by sunlight. Pipe that runs through a sunny utility room, along an unfinished basement ceiling near windows, or outside the building envelope suits copper better than plastic.

Buyer expectations. In some markets and some price brackets, copper is still read as the quality option, and a listing that says copper repipe lands differently.

Local rules. A few jurisdictions, condominium associations and older building standards still specify copper for some or all supply piping. Check before choosing.

Electrical bonding. In many older houses the metal water pipe is part of the electrical grounding path. Replacing it with plastic breaks that path, and an electrician has to provide a bonding jumper or another grounding electrode. A copper repipe keeps the path continuous. It is not a reason on its own, but it is a cost a PEX quote often leaves out.

Rodents and heat. Copper cannot be chewed, and it tolerates heat near water heaters and boilers without the clearances some plastic tubing requires.

When copper is the wrong choice

Aggressive water. Water with low pH or high chlorides corrodes copper from the inside, and pinhole leaks are the result. If the old copper failed that way, new copper will follow it unless the water is treated. Test the water before choosing the same pipe again.

Pipes in unheated spaces. Copper splits when it freezes solid. PEX tolerates a freeze far better, though neither should be left to freeze.

A tight budget. The premium over PEX is large, and on most houses the water does not know the difference. Copper is a choice, not an upgrade every house needs.

The plumbing lifespan guide puts copper at 50 to 70 years, the longest of the common supply materials, but that range assumes water that does not attack it.

Type L or Type M

Copper pipe comes in three common wall thicknesses, marked by printed color along the pipe.

Type K, green markings. The thickest wall, used mainly underground and for water services. Rarely used inside the house.

Type L, blue markings. The middle weight and the usual choice for a quality interior repipe. Some jurisdictions require it.

Type M, red markings. The thinnest wall. Allowed for interior residential supply in many places, cheaper per foot, and more vulnerable to pinholes where the water is aggressive.

The material difference between L and M is a modest part of a repipe, because labor dominates. Ask which type the quote assumes. If it says only "copper", it is probably Type M.

Soldered or press-fit. Most copper repipes are soldered with lead-free solder, as potable water rules have required for decades. Some plumbers use press fittings, which crimp onto the pipe with a powered tool and need no flame. The fittings cost more, the labor is faster, and there is no fire risk inside finished walls. Either is sound when done well.

Wall openings and patching

A PEX run can snake through a wall cavity from one opening. Copper needs a straight shot or a fitting at every turn, so a copper repipe usually opens more walls, at more places, than the same job in PEX.

Routine drywall openings are normally in the repipe price. What is often not:

• Openings behind tile, such as a shower valve wall, which may mean opening from the room on the other side
• Plaster and lath, which is slower to open and harder to match
• Texture and paint, which some plumbers leave to you
• Ceilings below a second-story bathroom

Each of those runs at about $300 to $1,500 per opening once it is repaired and ready for paint. Ask for a written count of expected openings and who closes them.

Why a copper quote expires sooner

Copper is a traded commodity, and its price moves with world markets in a way PEX does not. Supply houses reprice copper pipe and fittings often, sometimes weekly, and a plumber who held a number for three months can lose money on the job.

That is why copper repipe quotes often carry a short validity window, or a clause that adjusts the material line if the supplier's price changes before the pipe is bought. Ask how long the price holds and whether material is bought at signing or at the start of work. On a large house the material share is big enough that the answer matters.

A worked example: copper or PEX in the same house

A two-story, 1,800 square foot house with two bathrooms has galvanized supply pipe. The plumber expects two openings behind tile or plaster beyond the routine ones, possibly three. The owner asks for the job priced both ways.

In copper:

• Copper repipe: $8,000 to $22,000
• Extra openings: 2 to 3 openings × $300 to $1,500 each = $600 to $4,500
• Total: $8,600 to $26,500

In PEX:

• PEX repipe: $4,500 to $12,000
• Extra openings: 2 to 3 openings × $300 to $1,500 each = $600 to $4,500
• Total: $5,100 to $16,500

The opening lines are written the same for both, though in practice the copper job may need more. The gap between the totals is mostly soldering labor. On this house, copper is the right call only if one of the reasons above applies. Otherwise the difference buys nothing the water will notice.

Questions to ask on a copper repipe quote

• Type L or Type M, and soldered or press-fit?
• How many wall openings, where, and is patching, texture and paint included?
• Is the electrical bond checked or restored?
• Does the price include new shutoff valves at every fixture?
• Who pulls the permit and arranges the inspection?

Frequently asked questions

How much does it cost to repipe a house with copper?

$8,000 to $22,000, typically about $13,000 for a two-bathroom house. Fixture count, the number of stories and plaster or tile walls push it toward the top. Extra openings beyond the routine ones are usually priced separately.

Is Type L or Type M copper better for a house?

Type L has a thicker wall and is the better choice for longevity, especially where water chemistry is a concern. Type M is permitted for interior supply in many jurisdictions and costs less per foot. Since labor dominates a repipe, the upgrade to L adds relatively little.

Is a copper repipe worth it over PEX?

For most houses, no: PEX does the same job for much less. Copper is worth it for exposed runs, local rules that require it, buyer expectations in certain markets, or where the grounding path through the pipe matters.

Why does copper repiping cost so much more than PEX?

Every joint in copper is cut, cleaned, fitted and soldered or pressed, while PEX runs in long continuous lengths with few joints. The material also costs more. Labor is the larger share of the difference.

Related guides

• Repipe house cost — the whole job by house size, PEX and copper
• How long does plumbing last — what your existing pipe material tells you
• Slab leak repair cost — when a leak under the floor becomes a repipe
• Water main replacement cost — the line from the street, which a repipe does not include