Drain Tile Systems in Carol Stream, IL

How interior drain tile works

Interior drain tile is a perforated pipe along the inside of the footing. Water that reaches the footing drops into the pipe, runs to a sump pit, and is pumped out. The slab is cut and patched. The system does not, by itself, stop a creek from overtopping a window. It manages water that has already arrived at the foundation.

Pair it with the sump pump page. A tile run with no working pump is a trough. DuPage County’s flood guidebook treats an overflowing sump pit as underground flooding, and it recommends a battery or generator backup.

The Carol Stream flooding and drainage guide explains when the water is seepage and when it is overland flow. Read that before you treat every wet floor as a tile job.

Exterior drain tile

Exterior drain tile is set beside the footing, outside the wall, usually with a membrane on the wall and gravel around the pipe. It is the exterior half of the same idea: collect water before it presses on the basement. It means excavation, so access for a deck, a patio, or shrubs is part of the scope. The exterior page covers that dig.

Fixr, updated February 6, 2026, prints an interior perimeter drain at $40 to $120 per linear foot and an exterior French drain at $10 to $100 per linear foot. Those ranges are not the same job, and they are not averaged here. Angi, updated July 20, 2026, prints an interior weeping-tile range of $60 to $120 per linear foot. The cost guide keeps each row with its date.

Code basics

The slope, pit, and inspection notes on this page are DuPage County building guidance from buildingdupage.com. They are not a Carol Stream ordinance. Carol Stream’s own discharge rules are different on the property-line distance, and they are on the sump page.

That county guidance says drain tile needs a minimum uniform slope of 1/8 inch per foot toward an approved sump pit. It says the tile is inspected after it is placed, and before the slab is poured or the trench is backfilled. A sump basin in that guidance is at least 18 inches across and 24 inches deep, with a check valve on the discharge and a dedicated GFCI circuit. Discharge into the sanitary sewer is prohibited.

The same county page suggests discharge at least 10 feet from the foundation and 20 feet from property lines, and it says to confirm local setbacks. Carol Stream’s Engineering FAQ says the village has no code minimum distance from the property line. Use the village rule for a Carol Stream house, and label the 20-foot line as county guidance.

Window wells and crawl spaces

A window well that holds rain is a surface-water problem at one opening. A drain in the well, a cover, and grade that falls away from the well are the first checks. A well that dumps into the basement is not fixed by interior tile alone if the opening is the path.

A crawl space can take the same footing water without a full basement. The county drain-tile page treats crawl-space and exterior pumps as a different installation from a basement pit. This launch does not publish a separate window-well page or a separate crawl-space page. Say which one you have on the form.

Install day

An interior job means a cut slab, dust, and a patched floor. An exterior job means a trench and a disturbed yard. The county guidance’s duration note is 1 to 3 days for a professional installation, excluding drying, concrete, and finishes. That is that page’s note, not a promise for a Carol Stream house.

The estimate should name the linear feet, interior or exterior, the sump, the discharge point, and whether a backup pump is included. Prices vary. A free estimate gives the real number.

Cost

Use the cost guide for the sourced per-foot figures. Do not treat Fixr’s interior range and Angi’s interior range as one number.

Whether drain tile itself needs a Carol Stream permit is not stated in the code section used here. Plumbing and minor structural work are Type C items. Confirm the scope with Community Development. The fee listings are on the cost page.