Plumbing Repipe Cost Calculator: Size & Pipe Type

Square footage and pipe material set the range

A whole-house repipe replaces all or most of a home's water supply lines, and cost is generally estimated from square footage combined with the number of bathrooms and fixtures, since more fixtures mean more pipe runs and more connection points. This calculator multiplies your home's size by a rate tied to your chosen pipe material, whether that's PEX, copper, or CPVC, since each has a different material cost and installation labor profile.

PEX is generally the least expensive and fastest to install because of its flexibility, which lets it be run with fewer joints and less cutting into walls than rigid copper, while copper costs more but has a long track record and is sometimes preferred or required by local code in certain applications.

Accessibility drives labor cost significantly

Homes with a basement or crawlspace that gives easy access to existing pipe runs are generally cheaper to repipe than homes built on a slab foundation, where supply lines often run through the slab itself or require routing through walls and ceilings, adding drywall repair costs after the plumbing work is done. A multi-story home also typically costs more to repipe than a single-story home of the same square footage, since vertical runs between floors add complexity.

If walls need to be opened and later patched to access old galvanized or polybutylene piping, factor drywall repair and repainting into your total project cost, since these are usually billed separately from the plumbing labor itself.

Signs a repipe might be worth it

Homes with galvanized steel pipe, which corrodes internally over time and restricts water flow, or polybutylene pipe, which has a history of unexpected failures, are common candidates for a full repipe even if there's no active leak yet, since replacing proactively can be cheaper than dealing with recurring leaks and water damage. Chronic low water pressure, discolored water, or frequent small leaks across multiple fixtures are common signs that a repipe may be more cost-effective than ongoing spot repairs.

If you have an actual contractor quote, use the custom amount option so your estimate reflects real local pricing instead of a general average.

Permits and planning around the work

A whole-house repipe typically requires a permit and inspection, since it affects the home's potable water supply, and water service is usually shut off for portions of the project, so plan around that disruption. Our water heater replacement cost calculator and electrical rewiring cost calculator cover other major whole-house systems that are sometimes addressed in the same renovation window as a repipe.