French Drains in St. Louis
A homeowner-friendly guide to French drains in St. Louis: how they work, when they make sense, alternatives, and cost factors.
What a French drain does
A French drain typically uses a gravel-filled trench and perforated pipe to collect water and move it by gravity toward an appropriate outlet.
When it may make sense
- Persistent soggy ground along a predictable path.
- Subsurface water moving from an uphill area.
- A need to intercept water before it reaches a lower area.
When another fix may be better
Surface runoff may respond better to grading or a catch basin. Roof runoff may be better addressed at the downspout.
Cost drivers
Length, depth, access, soil, outlet design, utilities, aggregate, and restoration all affect scope.
Questions homeowners often ask
Can I diagnose this from photos alone?
Photos can help show symptoms, but slope, elevation, soil, discharge options, utilities, and rainfall behavior may require an on-site evaluation.
Should I get more than one estimate?
For meaningful drainage work, comparing scope—not just price—can be useful. Ask each provider what problem they believe they are solving and where the water will ultimately go.
Who should verify permits?
Ask the provider who will be responsible for checking and obtaining any permits or approvals required for the specific property and scope.
Drainage design depends on site conditions. Use the estimator for planning or request an on-site assessment from an independent provider.