A finished basement in Carol Stream that stays dry and passes inspection, because we check the walls and the drainage before a single stud goes in.
Basement finishing with us starts at the foundation, not the drywall. We look for damp spots, white mineral residue and cracks, test the sump, and fix any drainage problem before anything gets covered. Then our crew frames with treated bottom plates, insulates, runs the electrical and any plumbing rough-in, and finishes the space through drywall, ceilings, flooring, doors, trim and paint. Whole design-and-build basements are handled by our ONIT Restoration brand, which is the same company with a crew that does basements all day, while ONIT Solutions takes repairs to a finished basement, partial finishes and single trades like framing or drywall.
We cover Carol Stream from North Avenue and Gary Avenue, with Army Trail Road and Schmale Road getting us across town and the Great Western Trail cutting through. Carol Stream sits in DuPage County, and its building department issues the permit we pull before framing starts. If your foundation is concrete block rather than poured, we pay close attention to the mortar joints and the bottom course, since block can wick water in places a poured wall would not. Whatever the wall is made of, a crack that shows water gets sealed or repaired first, then the framing goes up.

We inspect every foundation wall and the floor for dampness, residue and cracks, and any active leak is fixed before we frame.
The sump pump gets tested, the discharge line checked, and a backup discussed if the pit runs often, all before the walls close in.
Bottom plates that touch concrete are pressure treated, and walls stand off the foundation so insulation and air have room.
Furnace, water heater and electrical panel keep the clearances code and service techs need, with a door or panel for access.
Plumbing for a bath or wet bar is roughed in when you plan one, and a bedroom gets the egress window code requires.
Drywall, ceilings, flooring, doors, trim and paint are all on our list, so the basement is done when we leave.
We walk the basement with you, check the moisture, and leave a written estimate that lists every phase from drainage to paint. The permit goes in before framing, and each inspection is booked as the work reaches it. Anything we find behind old paneling or under carpet gets shown to you and priced in writing, and nothing extra happens until you approve it. At the end we walk the finished space together and fix anything you point out.
Call or text (815) 585-1750 to set up a free on-site estimate. We start with the moisture check and put the whole plan in writing.
Call or text (815) 585-1750
Email matt@onitcc.com