13 Best ADU Builders in Chicago, Illinois

Verified ADU contractors and builders in Chicago, IL

Showing 113 of 13 listings

Absolute Garage Builders

Transform your underutilized garage into functional living space with expert conversion services in Chicago. Our specialized team handles every detail of converting your garage into a bedroom, home office, or recreation area that seamlessly integrates with your existing home.

+1 773-583-8800
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Assembly Squad Chicago inc

Specializing in accessory dwelling unit construction throughout Chicago, we transform residential properties into multi-unit homes with expert design and quality craftsmanship. From initial planning through final inspection, our team handles every aspect of ADU development to maximize your property's potential.

+1 312-544-9150
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Brothers General Construction & Properties LLC

Our ADU build company offers a variety of ADU types to suit the needs of our clients. We provide detached ADUs in various sizes and styles, such as tiny homes and cottages, that offer flexibility in use as rental units, guest houses, home offices, or living spaces for extended family members.

(815) 200-5612
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Chicago Garage Builders

Transform your Chicago garage into functional living space with expert conversion services that maximize your home's potential. Our specialized team handles every detail of garage-to-living-space renovations, from structural modifications to finishing touches.

+1 312-847-9217
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Fisher Garages

Transform your underutilized garage into functional living space with expert conversion services tailored to Chicago homes. Our specialized team handles every aspect of garage-to-living-space projects, from structural modifications to finishing touches that maximize your property's potential.

+1 773-610-1285
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Hudson Pro Builders

Hudson Pro Builders specializes in designing and building Accessory Dwelling Units (ADUs) that meet Chicago’s zoning requirements while delivering comfortable, stylish living spaces. They help homeowners create smart, efficient spaces that serve family, guests, or tenants.

(847) 881-3155
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Midway Garage Builders

Transform your garage into a functional living space with expert conversion services in Chicago, IL. Our specialized team handles every aspect of garage-to-living-space renovations, from structural modifications to finishing touches.

+1 773-788-3343
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Real Garages

Transform your underutilized garage into a functional living space with expert conversion services in Chicago. Whether you're adding a bedroom, home office, or recreational room, our skilled contractors specialize in garage-to-living-space conversions that maximize your home's potential.

+1 312-235-6294
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Regal Garages

Transform your Chicago garage into a functional living space with expert conversion services tailored to your home's unique layout and needs. Whether you're looking to add a bedroom, office, or recreation room, we handle every aspect of the project with precision and professionalism.

+1 708-734-2500
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Stanley Garage Builders Chicago

Transform your underutilized garage into functional living space with expert conversion services tailored to Chicago homes. Our specialized team handles every aspect of garage-to-living-space conversions, from structural modifications to finishing touches, creating the additional room your family needs.

+1 708-223-6464
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TrueForm Home Additions

Specializing in accessory dwelling unit construction throughout Chicago, we transform your property into multi-unit homes with expert design and quality craftsmanship. From initial planning through final completion, we handle every aspect of creating functional, code-compliant ADU additions for your Illinois home.

+1 773-945-5434
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Value Garage Builders

Transform your unused garage into functional living space with expert garage-to-living-space conversions throughout Chicago. Our specialized contractors handle every aspect of converting garages into bedrooms, offices, studios, and more with quality craftsmanship and attention to detail.

+1 773-991-0283
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Via Chicago Architects + Diseñadores

Via Chicago Architects + Diseñadores is an architecture and design firm based in Chicago. They offer design services for various projects, including ADUs.

(312) 879-9828
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Frequently Asked Questions — ADU Builders in Chicago

How much does it cost to hire an ADU builder in Chicago?

ADU construction costs in Chicago, Illinois vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Chicago to get accurate quotes for your specific project.

How long does it take to build an ADU in Chicago?

In Chicago, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Illinois local regulations. Prefab and modular ADUs often have faster timelines than site-built units.

Do I need a permit to build an ADU in Chicago?

Yes, a building permit is required for ADU construction in Chicago, Illinois. Your ADU builder will typically handle the permit application as part of their service. Illinois has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.

What types of ADUs can be built in Chicago?

Common ADU types in Chicago include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Chicago ADU builder can advise on what's allowed on your specific parcel.