Oak Brook, DuPage County

Basement Finishing in Oak Brook

A basement in your Oak Brook home can carry a full bath, a wet bar and real living space, and we plan the plumbing and wiring before the walls close.

Oak Brook basement finishing, planned around the plumbing

We finish basements by fixing the water first, then framing, insulating, wiring and plumbing, then closing everything in with drywall, ceilings, flooring, doors, trim and paint. Walls stand on treated bottom plates, and the rough-in for a bath or wet bar goes in while the framing is open and the inspector can see it. A full design-and-build basement runs under our ONIT Restoration brand, the same company with a crew that does basements all day. ONIT Solutions takes on repairs to an already finished basement, partial finishes and single trades such as framing or drywall.

Oak Brook is a regular stop for us, and the crew comes in on I-88, I-294, Route 83, 22nd Street and York Road. The village sits in DuPage County next to Oakbrook Terrace, Hinsdale and Elmhurst, and large lots are part of its character. If your basement is a big one, the plan matters more than the square footage. A bathroom placed close to the main stack or an existing ejector pit costs less to plumb than one on the opposite side of the room, so we map where the drains can run before we draw a single wall.

Basement Finishing by ONIT Solutions

What goes into an Oak Brook basement finish

Moisture and sump first

Seepage, sump function and the discharge line get checked and fixed before we cover anything.

Bathroom rough-in

Drain, vent and supply lines for a basement bath, tied into a gravity drain or an ejector pit depending on where the main line sits.

Wet bar plumbing and power

A bar sink, a dedicated circuit for a fridge or ice maker, and counter outlets where code calls for them.

Framing and insulation

Treated bottom plates, insulated outside walls and framed soffits that leave room around ducts and pipes.

Bedroom egress

If a guest room is part of the plan, code requires an egress window, and we cut the foundation, set the window and build the well.

Drywall to final paint

Drywall, ceilings, flooring, interior doors, trim and paint, inspected and finished.

From estimate to final walkthrough

We start with an on-site visit to check for moisture and see where the plumbing can go, and the written estimate lists each trade on its own line. If you add a room or upgrade a finish after we start, that change gets priced in writing and waits for your sign-off. The crew works in the order the inspections require, so rough-in is approved before insulation and drywall cover it. We close with a walkthrough of the finished space and a punch list we work through before we leave.

  • Drain routes mapped before walls are drawn
  • Estimate broken out by trade
  • Rough-in inspected while walls are open
  • Changes approved in writing first
  • Liability insurance certificate before we start
  • Punch list finished before we leave
Full basement design and build runs under our ONIT Restoration brand. Same company, a crew that does basements all day.
FAQ

Basement Finishing in Oak Brook: questions

Can a basement bathroom drain without an ejector pump?
It depends on how deep your main sewer line runs. If the line sits below the basement floor, a bath can drain by gravity, and if it leaves the house higher than the floor, the bath needs an ejector pit. We check before we price it.
Does Oak Brook require a permit for a basement finish?
Plan on one. New walls, wiring and plumbing in a basement typically need a building permit, and we pull it where the village requires it and book the inspections.
How long does a basement with a bath take?
Longer than one without, because the plumbing has its own rough-in and inspection. We put the schedule in writing with the estimate and book around the days we said.
Do you work in towns around Oak Brook?
Yes. We also finish basements in Oakbrook Terrace, Hinsdale, Elmhurst and Westmont.
How do I get an estimate?
Call or text (815) 585-1750. We will come out, check the basement for moisture and give you a free written estimate.

More questions and answers ›

Also in Oak Brook

Other work we do in Oak Brook

Nearby

Basement Finishing in nearby towns

Free estimate

Plan the bath and bar before the walls go up

Call or text (815) 585-1750 and we will walk your Oak Brook basement and map out the plumbing with you.

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