Plumbing cost guides
Major plumbing projects — whole-house repipe and sewer line replacement. Pick any project for a city-specific 2026 cost estimate.
- Whole House RepipeReplacing a home's water supply piping — typically swapping old galvanized or failing pipe for PEX or copper.National range$3,400 – $8,000
- Sewer Line ReplacementReplacing the main sewer line from the home to the municipal connection (trenchless or traditional excavation).National range$3,000 – $12,000
Often paired with Plumbing
Cheapest time for plumbing work
You can't time an emergency, but you can time a repipe or sewer job — and doing it in a slower month means slightly better pricing and a crew with the bandwidth to do it right.
Plumbing cost questions
How much do plumbing projects cost?
Nationally, plumbing projects run about $3,000 to $12,000 in 2026, with the exact number depending on the project and your city. Whole House Repipe tends to be the most affordable; Sewer Line Replacement the most involved. Pick a project below for a localized number.
What affects plumbing costs the most?
Three factors drive most of the variation: local labor rates, your climate zone and permit fees. Each estimate here accounts for all three, rather than relying on a single national average.
When is the cheapest time for plumbing work?
The best window is off-peak winter for planned work, when demand drops and installers discount — typically Around 5% off peak pricing. Avoid anytime it becomes an emergency.