House Repiping Cost

Repiping a house replaces the indoor water supply pipes: the hot and cold lines that feed sinks, showers, and the water heater. It isn't the sewer lateral and it isn't the buried service line from the street. Those jobs are priced on sewer line replacement cost and water line replacement cost. Mixing them on one invoice is how a copper bid swallows a clogged drain.

Angi, on August 3, 2026, lists a whole-house repipe at $1,500–$15,000, with most homeowners around $7,500. HomeGuide, on August 29, 2025, puts an existing 2,000-square-foot home at $3,100–$5,500.

House repiping cost by material

PEX is cross-linked polyethylene, a flexible plastic tube. CPVC is a rigid plastic. Copper is metal.

The material row isn't the job. Angi says labor is about 70% of a typical $7,500 bid, around $5,250 if you take that share at face value. That percentage is Angi's own estimate, so treat it as a rough guide.

Cost by bathrooms

HomeGuide's March 4, 2025 polybutylene-replacement table prices by house size. We didn't convert it into a square-foot rate, because the source doesn't give one.

Those rows are for replacing polybutylene, the gray plastic supply pipe used from the late 1970s into the 1990s. A galvanized or lead supply system is the same kind of whole-house job. Cast iron is usually on the drain side of the house. Older supply lines are more often galvanized steel or copper. Don't use a cast-iron sewer quote as a repipe quote.

Drywall, permits, and time

Opening walls to reach old pipe is extra unless the bid says otherwise. HomeGuide lists about $300–$1,500 to repair drywall after a repipe. Angi lists about $300–$900 for small to larger drywall work. Angi also lists a permit at $50–$500.

HomeGuide says a small house can be done in a few days and a larger house can take more than a week, plus wall repairs. Angi says a few days for small homes and several weeks for a large, multi-story house. There is no single national day-count in those pages, so this site doesn't invent one.

PEX can often be snaked through smaller openings. Copper needs more cuts. So the installed copper total ends up several times the PEX total, even when the tubing prices look close.

When a partial repipe is enough

One branch that froze, or one bathroom that was remodeled, can be a partial job. Recurring pinhole leaks, rusty water from galvanized pipe, polybutylene, or lead usually mean the whole supply system. The drain and the sewer lateral can still fail on their own. A slow toilet after a shiny PEX repipe points to a drain cleaning or lateral problem. There's no reason to reopen the walls over it.

Worked example

A 3-bed, 2.5-bath house that still has polybutylene. HomeGuide's PEX row is $3,000–$7,000. Copper on the same size is $4,500–$10,000.

Add drywall at about $300–$1,500 if the plumber isn't patching. Add a permit at $50–$500.

On the PEX low end: $3,000 + $300 + $50 = $3,350. On the copper high end: $10,000 + $1,500 + $500 = $12,000.

Angi's $7,500 average sits inside that spread. It mixes materials and house sizes, so use it as a sanity check on the bids you get.

How to save money

• Ask for PEX and copper as two written totals on the same fixture count.
• Get drywall patching in or out of the plumbing bid, in writing.
• Don't treat a water-service or sewer-lateral quote as a house repipe.
• If only one bathroom is failing, ask for a partial price next to a whole-house price.
• Keep the old pipe labeled on a photo so the next plumber isn't guessing galvanized versus polybutylene.