Addison, DuPage County

Basement Finishing in Addison

Add a bathroom, a family room or a guest space to your Addison basement, built dry and to code with the plumbing planned before the slab is cut.

Basement finishing in Addison

We finish basements in a set order: moisture and drainage first, then framing, rough-in, inspections and finishes. Walls go up on pressure-treated bottom plates with the space the furnace, water heater and panel need left clear. Insulation, electrical and any plumbing for a bath or wet bar follow, then drywall, ceilings, flooring, doors, trim and paint. Complete design-and-build basements are run by ONIT Restoration, the same company under a brand whose crew does basements all day, and ONIT Solutions handles partial finishes, repairs to a finished basement and single trades like framing or drywall.

We work in Addison every week, coming in on I-290 or I-355 and using Lake Street, Route 53 and Army Trail Road to get around town. When a basement bath is in the plan, the plumbing gets the most thought. If the new toilet and shower sit below the house's main sewer line, they need an ejector pit and pump to lift the waste up and out, and that pit has to be cut into the slab and vented properly. We sort that out at the estimate so the bathroom is priced right from day one.

Basement Finishing by ONIT Solutions

What we handle in an Addison basement

Water check up front

Walls and floor get looked over for seepage and cracks, and the sump is run, before any material is ordered.

Ejector pit for a lower bath

When a bathroom sits below the sewer line, we cut the slab for an ejector basin, set the pump and vent it to code.

Wet bar plumbing

A bar sink gets supply and drain rough-in planned around the slab, the stack and where the cabinets will land.

Treated framing and insulation

Pressure-treated plates sit on the concrete, the walls get insulated, and mechanical clearances stay open.

Egress for any bedroom

Code requires an egress window and well for a basement bedroom, and we include it whenever one is planned.

Drywall to final paint

Ceilings, walls, flooring, doors and trim are finished and painted, with the rest of the house protected from dust.

How an Addison basement project runs

First we come out, look at the space and the plumbing, and give you a free estimate in writing. You see the scope broken into phases, including the slab work if a bath needs it. Hidden problems found once work starts get shown to you and priced on paper, and they wait for your approval. We schedule the inspections as each stage is ready and finish with a walkthrough of the room.

  • Bathroom plumbing planned at the estimate
  • Slab cutting priced before work starts
  • Mechanical clearances kept open
  • Dust contained at the basement stairs
  • No extra work without your written okay
  • Permit pulled where Addison requires it
Full basement design and build runs under our ONIT Restoration brand. Same company, a crew that does basements all day.
FAQ

Basement Finishing in Addison: questions

Can you add a bathroom to my Addison basement?
Usually, yes. If the fixtures are below the sewer line we install an ejector pit and pump, and we price that in the estimate rather than after the fact.
Do you need a permit to finish a basement in Addison?
A basement finish with new walls, electrical or plumbing generally needs a permit from the village. We find out what Addison requires, file it, and schedule each inspection.
What towns around Addison do you work in?
We also finish basements in Villa Park, Lombard, Wood Dale and Elmhurst.
How long does a basement with a bath take?
Longer than a basement without one, since plumbing adds slab work and an extra inspection. The schedule is written into your estimate, and we book around the days we said.
How do I get a price?
Call or text (815) 585-1750. We come out, look at the space and the plumbing, and leave a written estimate.

More questions and answers ›

Also in Addison

Other work we do in Addison

Nearby

Basement Finishing in nearby towns

Free estimate

Get an estimate for your Addison basement

Call or text (815) 585-1750 and tell us what the basement needs to hold. We will plan the plumbing, the walls and the finishes and put it in writing.

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