The cost to install a french drain in St. Louis ranges from $1,890 to $9,460, with most homeowners paying around $4,730. Your actual cost depends on several factors specific to your home and the St. Louis market.
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.
French drain installation in St. Louis generally does not require a permit for standard installations. Check with your local building department if your project involves panel work or structural changes.
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.
While possible for experienced homeowners, French drain installation involves significant complexity. In St. Louis, you may still need a licensed pro for permits and inspections. DIY could save $2,149–$2,763 in labor.
Compare prices from licensed, insured contractors in St. Louis.
Browse More Plumbing Projects →The average cost is $4,730, with most homeowners paying between $1,890 and $9,460 depending on project complexity.
A permit is generally not required for standard installations. Check with your local building department for specifics.
Most projects take 2–5 days to complete.