Naperville, DuPage and Will counties

Basement Finishing in Naperville

Turn the lower level into a guest suite with its own bath, framed and plumbed the way the inspection expects. We work in Naperville every week.

Naperville basement finishing with the bath planned from the start

If a basement bath is on your list, it has to be decided before the framing, because the drain lines go in first. Where the fixtures sit below the sewer line, a bath needs an ejector pit, and we lay it out with you on the floor before anything is cut. Ahead of that we check the walls and slab for moisture and handle any drainage or sump work. A full design-and-build basement runs under ONIT Restoration, our own brand with a crew that does basements all day, and ONIT Solutions handles partial finishes, single trades and repairs to a basement that is already done.

Naperville is on our regular route along Route 59, 75th Street and Ogden Avenue, and off I-88 on the north end. The city sits in both DuPage and Will counties, and the permit goes through the city of Naperville either way. If your lot is close to the DuPage River or sits low on the block, we take extra time on the moisture check, looking for staining, efflorescence and how often the sump has been running. A dry wall in October can be a wet one in April, so we ask about the spring before we price the finish.

Basement Finishing by ONIT Solutions

What we include in a Naperville basement finish

Moisture and drainage first

We check the walls, the slab and the sump history, and any drainage or pump work happens before framing starts.

Bath and wet bar rough-in

Drain, vent and supply lines go in where you planned the fixtures, with an ejector pit when the drains sit below the sewer.

Treated-plate framing

Every bottom plate on concrete is pressure treated, and the walls are laid out to leave the furnace and water heater their required clearance.

Insulation and electrical

Foundation walls are insulated, and new circuits, outlets and lighting are run and inspected.

Egress for a bedroom

A bedroom gets a code egress window with a proper well, cut into the foundation and sealed.

Finishes

Drywall, ceilings, flooring, doors, trim and paint finish the rooms.

How a Naperville basement finish runs

The estimate starts on site with a moisture check and a walk of every room you want, and it costs you nothing. You get a written scope that separates the water work, the rough-in and the finishes. Anything that turns up once a wall is open gets priced in writing, and nothing happens until you approve it. We schedule around the city's rough and final inspections and tell you which days the crew will be there. The last step is a walkthrough with you, running every fixture and flipping every switch.

  • Bath layout set before framing
  • Ejector pit planned where the drains need one
  • Moisture checked before any wall goes up
  • City permit and inspections handled
  • Written approval before any change
  • Every fixture run at the walkthrough
Full basement design and build runs under our ONIT Restoration brand. Same company, a crew that does basements all day.
FAQ

Basement Finishing in Naperville: questions

Can you add a bathroom to my Naperville basement?
Yes. We rough in the drain, vent and supply lines, add an ejector pit if the fixtures sit below the sewer line, and finish the room with tile, a vanity and a fan vented outside.
Does Naperville require a permit to finish a basement?
Finishing a basement in Naperville generally takes a city permit, since it adds framing, electrical and often plumbing. We pull the permit and schedule each inspection, and the walls stay open until rough-in is approved.
How long will the basement take?
A bath adds plumbing and inspection steps, so it runs longer than an open rec room. We lay out the stages and the inspection points in the estimate so you know the order before we start.
Do you work in towns around Naperville?
We do. We also finish basements in Lisle, Woodridge, Warrenville and Wheaton.
How do I get started?
Call or text (815) 585-1750 and tell us what you want down there. We will come out, check for moisture and write the estimate.

More questions and answers ›

Also in Naperville

Other work we do in Naperville

Nearby

Basement Finishing in nearby towns

Free estimate

Plan your Naperville basement with the plumbing figured out first

Call or text (815) 585-1750 and we will set a time to look at the space, map out the bath and hand you a written estimate.

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