Darien, DuPage County

Basement Finishing in Darien

Get a finished basement in Darien with a ceiling that hides the ducts and beams and still lets you reach the shutoffs. We work in Darien every week.

Darien basement finishing, ceiling to floor

We finish basements in a set order so nothing gets built over a problem. The first stop is moisture: we check the foundation and slab, run the sump and fix drainage before framing. Walls go up on treated bottom plates with clearance kept for the furnace, water heater and panel, then insulation, wiring and any plumbing rough-in for a bath or wet bar. After the inspections pass, we hang drywall, build the ceiling, lay floors, set doors and trim, and paint.

We cover Darien off I-55 and Route 83, working along 75th Street and Cass Avenue in DuPage County. A lot of the planning in a basement happens overhead, where ducts, beams, pipes and wiring share the space between the joists. If a main duct or a steel beam hangs low, we frame a soffit around it and keep the rest of the ceiling as high as the room allows. Shutoff valves and cleanouts get access panels, and you choose a drywall or drop ceiling based on how often you expect to get above it.

Basement Finishing by ONIT Solutions

What a Darien basement finish includes

Moisture check and sump test

We look for water at the walls and slab, run the sump before any framing, and fix drainage first if it needs it.

Soffits around ducts and beams

Low ducts and beams get boxed in tight, so the open ceiling stays as high as possible.

Access to valves and cleanouts

Shutoffs, cleanouts and junction boxes get access panels instead of disappearing behind drywall.

Framing on treated lumber

Bottom plates are pressure-treated, and we leave the clearance the furnace, water heater and panel need.

Insulation and rough-in

We insulate the walls and rim joists, then run electrical and any bath or wet bar plumbing for inspection.

The ceiling you choose, then finishes

We build a drywall or drop ceiling, then finish walls, floors, doors, trim and paint.

How we run a Darien basement

Our estimate visit is free, and the written scope that follows marks every soffit, panel and phase. If we find something behind an old finish or above the ceiling, you get a written price to approve before we act on it. We pull the permit through the city, book the crew around the inspections, and tell you which days will be dusty. When we finish, we walk the basement with you, open each access panel and fix what you flag.

  • Sump and walls checked before framing
  • Ceiling kept as high as the ducts allow
  • Access panels at every shutoff
  • Permit pulled through the city
  • Extra work approved in writing first
  • Every access panel opened at the final walk
Full basement design and build runs under our ONIT Restoration brand. Same company, a crew that does basements all day.
FAQ

Basement Finishing in Darien: questions

Do you handle a full basement design and build?
Full design-and-build basements run under our ONIT Restoration brand, which is the same company with a crew dedicated to basements. ONIT Solutions takes repairs to a finished basement, partial finishes and single trades like framing or drywall.
Does Darien require a permit for a basement finish?
Yes. New walls, electrical and plumbing need a permit from the city and inspections along the way. We pull it and meet the inspector at each stage.
Should we go with a drywall or a drop ceiling?
Drywall looks cleaner and keeps sound down. A drop ceiling lets you lift a tile to reach pipes and wiring. We can also mix them, with drywall over the main room and a drop ceiling over the mechanical area.
How long will the work take?
That depends on the scope and on when inspections come up. Framing, rough-in and insulation each get inspected before drywall. We put the full sequence on a written schedule.
Do you also work near Darien?
Yes. We finish basements in Westmont, Willowbrook, Woodridge and Downers Grove. Call or text (815) 585-1750 to set up a visit.

More questions and answers ›

Also in Darien

Other work we do in Darien

Nearby

Basement Finishing in nearby towns

Free estimate

Book a Darien basement estimate

Set up a free on-site estimate by calling or texting (815) 585-1750. We will look up at the ceiling first and tell you what it means for the rooms.

Call or text (815) 585-1750
Email matt@onitcc.com

Or call or text (815) 585-1750. We reply during business hours.

Call (815) 585-1750Get an Estimate