Prices estimated using the NailThePrice Local Cost Model™ — national averages adjusted for St. Louis's labor rates, cost of living, and material pricing.
The cost to repipe a house in St. Louis ranges from $3,780 to $14,160, with most homeowners paying around $7,080. Your actual cost depends on several factors specific to your home and the St. Louis market.
PEX is significantly cheaper and faster to install than copper, but copper has a longer track record and is required by some local codes.
Larger homes need more pipe, more fittings, and more labor hours — repiping a 2,500 sq ft home costs roughly twice what a 1,200 sq ft home costs.
More bathrooms, kitchens, and fixtures mean more connection points and branch lines, increasing materials and labor.
Slab foundations require rerouting pipes through the attic or walls (expensive) versus crawlspace access which is much easier and cheaper.
Open walls (during a remodel) make repiping dramatically cheaper than working through finished walls, which require cutting and patching.
The Midwest has a strong pool of skilled tradespeople, and labor rates tend to be moderate compared to coastal cities. Union and non-union shops both compete, giving homeowners options on pricing.
Budget $92–$460 for permits and inspections. Your contractor typically handles the permit process, but confirm this upfront.
Freeze protection is critical here. Budget for pipe insulation, heat tape on exposed runs, and deeper trenching below the frost line. Winter plumbing work typically costs more due to frozen ground conditions.
This project requires a licensed professional in St. Louis. Attempting whole house repiping without proper licensing can void insurance and create serious safety hazards.
Compare prices from licensed, insured contractors in St. Louis.
Get Free Quotes from St. Louis Pros →The average cost to repipe a house in St. Louis ranges from $3,780 to $14,160, with most homeowners paying around $7,080. This estimate includes both labor ($4,960) and materials ($2,120). Costs in St. Louis are lower than the national average due to local cost of living and labor market conditions. Get multiple quotes from licensed St. Louis contractors to lock in the best price.
Yes, St. Louis typically requires a permit for whole house repiping. Budget $92–$460 for permit fees and expect 1–2 weeks for approval. Your contractor typically handles the permit application. Working without a required permit can void warranties and create problems when selling your home.
Most whole house repiping projects in St. Louis take 3–7 days to complete. The timeline depends on project scope, contractor availability in the St. Louis metro area, and seasonal demand. Scheduling during St. Louis's off-peak season (typically fall and winter) can reduce wait times and may lower costs.
Signs include recurring leaks, rusty or discolored water, low water pressure in multiple fixtures, visible corrosion on pipes, or galvanized steel pipes (common in pre-1970 homes). A plumber can inspect and advise for $150–$300.
PEX is the most popular choice for repiping due to lower cost, faster installation, freeze resistance, and flexibility. Copper is more durable and has a proven 50+ year lifespan but costs 2–3x more installed. Both are excellent choices.