Polybutylene Pipe Replacement
Cost Calculator

What goes into your number

• ▸Square footage: $2–$5/sq ft baseline. Bigger homes = more linear feet of pipe.
• ▸Fixture count: $500–$700 per connection — sinks, toilets, showers, hose bibs.
• ▸Foundation type: Slab homes need overhead routing — the calculator applies 1.3× to the base calculation.
• ▸Material: PEX is the baseline. The calculator applies 1.1× (CPVC) and 2.5× (copper) to the base calculation.
• ▸Wall repair: Drywall patching/painting can add $1,000–$3,000 if not in scope.

See every rate and a step-by-step worked example in our Delaware whole-house repipe cost guide, or read how our polybutylene pipe replacement inspection and repipe work.

The clock is ticking

Polybutylene piping was installed in millions of U.S. homes between 1978 and 1996, including thousands across Middletown, Bear, and Newark. Chlorinated municipal water reacts with the plastic from the inside out — and the failure point is invisible until a pipe bursts behind a wall.

A single overnight burst can cause $20,000+ in water damage. A planned repipe is almost always cheaper than the emergency you're trying to avoid.