How much does basement finishing cost?

Finishing a basement in the Chicago suburbs typically runs $25,000–$50,000+ depending on square footage, layout, finishes, and whether you need a bathroom, wet bar, or egress windows. GS Construction provides a free, itemized estimate broken down by phase.

How long does basement finishing take?

A typical basement finish takes 6–12 weeks. Waterproofing, framing, electrical, and plumbing are the longest phases. Adding a full bathroom or wet bar adds 1–2 weeks. We work to minimize disruption to your daily life.

Do I need permits to finish my basement in Illinois?

Yes — Illinois municipalities (Arlington Heights, Palatine, Hoffman Estates, Schaumburg, etc.) all require building, electrical, and plumbing permits for basement finishing. GS Construction handles all permitting and inspections for you.

Can you add a bedroom or bathroom in my basement?

Yes. Basement bedrooms require code-compliant egress windows, and bathrooms require proper plumbing tie-ins (often with an ejector pit). We handle the engineering, permits, and full build.

What about moisture and water in the basement?

Before any finishing, we assess your basement for moisture intrusion. We can install vapor barriers, sump systems, drain tile, and proper insulation to ensure your finished space stays dry and mold-free.

Chicago Suburbs Basement Finishing — 72 Reviews

Finished basement family room with a leather sofa, recessed lighting, carpet and built-in desk — representative of the finished basement projects GS Construction builds in the Chicago suburbs

Expert Basement Remodeling Services

Unlock your basement's full potential with GS Construction's expert basement finishing and remodeling services. Whether you envision a home theater, in-law suite, home gym, or recreation room, we transform unused below-grade space into valuable, code-compliant living areas — including framing, electrical, plumbing, egress windows, drywall, flooring, and finishes.

What We Offer

Home Theaters & Media Rooms

Soundproofed rooms with optimal acoustics, dimmable lighting, and built-in seating.

Guest Suites & In-Law Apartments

Bedrooms with egress windows, full en-suite bathrooms, and kitchenettes.

Recreation Rooms & Wet Bars

Game rooms, custom wet bars, and entertainment spaces built for hosting.

Waterproofing & Egress

Moisture control, sump systems, and code-compliant egress windows for bedrooms.

Our Process

From initial consultation to final walkthrough, here's what to expect.

Consultation

We inspect your basement, check for moisture issues, and plan your layout.

Design & Permits

Our team plans for moisture control, egress, electrical, and pulls permits.

Build

Framing, insulation, mechanicals, drywall, flooring, and finishes — all in-house.

Enjoy

Your new finished basement is ready for years of enjoyment.

Testimonials

Your Neighbours Love Us

Real reviews from homeowners. Ask us for live phone references.

5 Stars — Pauline & Scott Z

Long Grove, IL · May 2018

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Basement Remodeling by City

Find local basement remodeling contractors in your Chicago suburb.

Schaumburg Deer Park Barrington Glenview Northbrook Arlington Heights Winnetka Wilmette Kenilworth Glencoe Evanston Mount Prospect Lake Bluff Barrington Hills Buffalo Grove Chicago Countryside Deerfield Des Plaines Elgin Elk Grove Village Elmwood Park Forest Lake Forest Park Forest View Fort Hill Fox River Grove Grayslake Great Lakes Green Oaks Gurnee Harwood Heights Hawthorn Woods Highland Park Hoffman Estates Hometown Indian Creek Inverness Kildeer Lake Barrington Lake Forest Lake Villa Lake Zurich Libertyville Lincolnshire Lincolnwood Lindenhurst Long Grove Long Lake Melrose Park Morton Grove Mundelein Niles Norridge North Barrington Northfield Northlake Oak Forest Oak Lawn Oak Park Orland Hills Palatine Palos Park Park Forest Park Ridge Port Barrington Prospect Heights River Forest River Grove Riverdale Riverside Riverwoods Rolling Meadows Rosemont Schiller Park Skokie South Barrington Streamwood Vernon Hills Western Springs Wheeling Willow Springs

Ready to Finish Your Basement?

Get a free consultation and quote for your remodeling project. GS Construction is ready to bring your vision to life.

Get Free Quote View Our Work

How much does basement finishing cost?: Finishing a basement in the Chicago suburbs typically runs $25,000–$50,000+ depending on square footage, layout, finishes, and whether you need a bathroom, wet bar, or egress windows. GS Construction provides a free, itemized estimate broken down by phase.
How long does basement finishing take?: A typical basement finish takes 6–12 weeks. Waterproofing, framing, electrical, and plumbing are the longest phases. Adding a full bathroom or wet bar adds 1–2 weeks. We work to minimize disruption to your daily life.
Do I need permits to finish my basement in Illinois?: Yes — Illinois municipalities (Arlington Heights, Palatine, Hoffman Estates, Schaumburg, etc.) all require building, electrical, and plumbing permits for basement finishing. GS Construction handles all permitting and inspections for you.
Can you add a bedroom or bathroom in my basement?: Yes. Basement bedrooms require code-compliant egress windows, and bathrooms require proper plumbing tie-ins (often with an ejector pit). We handle the engineering, permits, and full build.
What about moisture and water in the basement?: Before any finishing, we assess your basement for moisture intrusion. We can install vapor barriers, sump systems, drain tile, and proper insulation to ensure your finished space stays dry and mold-free.

Basement Finishing & Remodeling Contractors