French Drains and Yard Drainage in Indianapolis
Sometimes the basement is fine and the yard is the problem. A French drain catches water in the soil and carries it somewhere harmless.
A French drain is a trench filled with gravel around a perforated pipe that collects water in the soil and carries it away from the house. Fixr's 2025 guide puts a typical project at $2,800–$6,500, or $10–$100 per linear foot outside. In Indianapolis it pays off where water pools against the foundation.
When does a French drain make sense here?
Look at the yard after a heavy spring rain. If water stands along one side of the house, a neighbor's lot drains toward yours, or a low patch stays soggy for days, outside drainage may cut the water reaching your walls. Brookston soil, mapped in many of Marion County's low spots, can hold water at the surface in normal years (USDA NRCS soil series description), and those are the spots where a French drain earns its cost.
It is less useful when the water table itself is the cause. If the basement leaks evenly along every wall, the fix is usually an interior drain and sump pump.
How a French drain is built
- A route is chosen from the wet area to an outlet: a lower part of the yard, a dry well or a storm connection where permitted.
- Utilities are marked first. Indiana 811 requires a request at least two working days before any digging, and the service is free.
- A trench is dug with a steady fall toward the outlet, lined with filter fabric and bedded in washed gravel.
- Perforated pipe goes in, more gravel and fabric go over it, and the sod is replaced.
Footing drains are a bigger job
A drain laid along the outside of the footing, seven or eight feet down, is a different project. It needs full excavation beside the wall, and the dense glacial till under most of the county is slow digging. Fixr's 2025 guide lists basement French drains inside the house at $40 to $100 per linear foot, and This Old House puts exterior waterproofing at roughly $7,000 or more. Compare options on the basement waterproofing price guide for Indianapolis.
Start with the cheap fixes
Before paying for a trench, check that gutters are clear, downspouts release water at least three feet from the house as Citizens Energy Group recommends, and the soil slopes away from the foundation. Those three steps fix more wet walls than people expect.
Questions homeowners ask
Can a French drain connect to the sewer?
Not the sanitary sewer. Citizens Energy Group bars clear water from the sanitary system. A storm sewer connection may be possible in some places; ask the utility first.
Do French drains clog?
They can, especially in silty soil. Filter fabric around the gravel and a cleanout at the upper end make clearing it far easier later.
Tell us what your basement is doing
A puddle along one wall, a crack that weeps after rain, a sump pump that runs all spring, or a musty smell you can't place. Pick what fits and a local specialist who works in Indianapolis calls you back.