Get a finished basement in Clarendon Hills that stays dry behind the walls, because we find and fix the water before anything gets covered.
A finished basement is only as good as what sits behind the drywall, so our first visit is about water, not paint colors. We look for stains, mineral lines and damp spots, check how the sump runs, and fix drainage before framing starts. Once the space is dry, the crew builds the walls on treated bottom plates, insulates them, and roughs in the electrical and any plumbing you want for a bath or a wet bar. Drywall, ceilings, flooring, doors, trim and paint close it out, and we handle the permit and inspections.
We cover Clarendon Hills from Ogden Avenue, Route 83 and 55th Street, and the crew works the streets around the Metra station out toward Hinsdale and Westmont. It is a residential DuPage County village with tree-lined streets. If your basement shows a white, chalky line partway up the foundation wall, that is efflorescence, and it means water has moved through the concrete at some point. We want to know where that line sits and why before we decide on insulation and framing, because covering it without a fix only hides the next leak.

We trace stains and mineral lines on the foundation and check the cove joint, where the wall meets the slab, for seepage.
If the sump pump, the discharge line or the downspouts need work, that happens before a single stud goes in.
Treated bottom plates, a gap off the concrete, and framing that leaves the shutoffs and cleanouts where you can get to them.
Rigid foam or another basement-rated insulation keeps the outside walls warm enough that condensation does not form behind the drywall.
New circuits, outlets and lights, and drain and supply lines for a bathroom or bar sink when you plan one.
Drywall, ceiling, flooring, doors, trim and paint, plus a code egress window if one of the rooms will be a bedroom.
The free estimate starts with a moisture check, and you get the findings and the full scope in writing before you decide anything. If a water fix is needed, it is listed as its own line so you can see what it adds. Changes after we start, including anything we find once a wall is open, get priced in writing and wait for your yes. Inspections set the pace of the schedule, and we finish with a walkthrough of every room.
Text a few photos of the basement walls and floor to (815) 585-1750, and we will book the moisture check and a free estimate.
Call or text (815) 585-1750
Email matt@onitcc.com