Home Additions in Northbrook, IL.
Honest home additions for Northbrook, IL homeowners. Same team, same project manager, same name on every invoice - from demo day through final walkthrough.
- 15+years of combined crew experience
- 2-yrwritten warranty
- ★★★★★five-star Google reviews
- $0for the estimate visit
- 15+ Years Combined crew experience
- Licensed & Insured $2M general liability
- 2-Year Warranty Written, on every project
- ★★★★★ on Google five-star verified reviews
Home Additions planned for how Northbrook homeowners live.
Northbrook draws a line between an addition and a major renovation, and which side of that line a project lands on changes the permit, the drawings and the timeline. We check it at the first meeting.
Addition or Major Renovation
The Village of Northbrook requires a Major Renovation permit when the added habitable floor area, not counting the basement, exceeds 115 percent of the existing habitable floor area. The area calculations have to appear on the cover sheet of the plans. A smaller addition stays on the addition path.
Review time and paperwork
The village estimates up to fifteen business days of plan review for larger single-family projects such as additions, compared with up to ten for small projects such as a kitchen or a bath. The application packet includes a building site and utility data worksheet, a water service and meter worksheet, a tree protection agreement and a fire protection letter of understanding. When plumbing is involved, the village asks for the plumbing contractor’s license and a notarized or sealed letter of intent.
On site
- General, electrical, plumbing, concrete and paving, and sewer contractors must hold valid licenses to work in the village.
- Construction noise is allowed from 7 a.m. to 7 p.m. on weekdays and 9 a.m. to 5 p.m. on Saturday, and not on Sunday.
- Inspections need at least 48 hours of notice, and rough-in, framing and insulation inspections happen before walls are closed.
How ADS runs it
We measure the existing house during a free in-home visit, work out the floor area ratio that decides the permit type, and write an estimate that lists foundation, framing, roofing, mechanical work and finishes separately. We pull the permit and schedule the inspections. Confirm current requirements on the Northbrook page and with the village before design begins.
How ADS builds an addition: zoning check, engineered drawings, permits, footings and roof tie-in, and the schedule you get in writing.
Home Additions projects & pricing → Full home additions details → Remodeling permits in Northbrook →
What Northbrook homeowners get when they hire ADS.
The kind of craft we'd bring to your Northbrook home.
Three steps from first call to final walkthrough.
Free in-home estimate
We drive to your Northbrook home, measure the space, and listen. Written scope usually within 48 hours of the visit.
Detailed written quote
Materials, finishes, schedule - priced in person, line by line, in writing. You see where every dollar goes before you sign.
Build & final walk
Our team runs the agreed schedule. Punch-list walkthrough, then 2-year written warranty kicks in.
Book your Northbrook visit
We respond to most inquiries within 2 hours on business days. Estimate visit is free, no pressure to sign that day.
Four guarantees we put in writing - before any work begins.
Most contractor horror stories trace back to four broken promises. We close all four in our contract, not in marketing.
2-Year Workmanship Warranty
Every joint, tile, fixture, and finish is backed for two full years. If our build fails, we come back and fix it - no charge, no debate.
Free On-Site Estimates
We assess your project in person and put the estimate in writing - line by line, free, no obligation. If anything changes on site, you hear it from us first, with numbers.
Fully Licensed & Insured
Illinois-licensed contractor, $2M general liability, workers' comp on every crew member. We bring proof of insurance before we bring tools.
One Team Accountable
One accountable team from demo day to final walkthrough. Specialty trades work under our supervision, so there is no scheduling chaos and no "the other guys did that part."
Get your free home additions estimate in Northbrook
We call or text back within 2 business hours, then measure at your Northbrook home and price it in writing. No fees, no hard sell.
- Free on-site visit & written estimate
- Fixed price before work starts
- Licensed & insured · 2-year warranty
Prefer to talk? (224) 278-8533
Home Additions near Northbrook.
What else we build in Northbrook, IL.
Five questions every homeowner asks first.
Plain answers - the kind we'd give a neighbor over coffee, not the ones written for a brochure.
Have a different question? Ask during your free estimate →-
How much does a typical kitchen or bathroom remodel cost?
Bathroom remodels in our area typically run $18,000–$45,000. Mid-range kitchens are usually $35,000–$80,000 - full custom kitchens can reach $120,000+. We give you a detailed estimate in writing after the in-home visit, so you see the numbers line by line before signing anything.
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How long will my project take?
A bathroom is usually 3–5 weeks from demo to final walkthrough. A standard kitchen runs 6–8 weeks. Basement finishes are 5–8 weeks. We give you a written schedule before we start - and one project lead coordinates every trade, so the schedule doesn't stall between steps.
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Do you handle the permits and inspections?
Yes - every time. We pull the permits, schedule the inspections, and meet with the inspectors. You don't deal with the village. We handle Buffalo Grove, Arlington Heights, Lombard, Glen Ellyn, Wheaton, and the rest of our service area.
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Can we live in the house during the remodel?
Almost always, yes. We seal off the work zone with plastic, set up a temporary kitchen if we're remodeling yours, vacuum daily, and do a deep clean at the end. Most clients stay in the home for the full project - we plan the sequence around your daily life.
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How do payments work?
A small deposit at signing, then progress payments tied to milestones (rough-in complete, drywall complete, final walkthrough). You never pre-pay for work that hasn't started. Final payment is only released after you sign off on the final walkthrough - not before.