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Mark Home Builders & Additions is a full-service home contractor proudly serving Elgin and the surrounding communities. They specialize in custom home builds, home additions, and renovations that combine quality craftsmanship with practical design.
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Hudson Pro Builders offers ADU construction in Chicago, Cook County, DuPage County & Lake County. Services include garage conversions, basement ADUs, in-law suites & backyard cottages, with full design, permitting & zoning support.
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Chicago Granny Flats offers turnkey ADU design-build services in Chicago, specializing in Coach Houses and Backyard Cottages. Using recycled steel panels, they deliver energy-efficient granny flats with guaranteed pricing, custom floor plans, and full utility connections.
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ADUs (accessory dwelling units) are secondary homes on existing lots. Brothers General Construction builds detached, attached, garage conversion & junior ADUs across Illinois. Chicago ADU costs range $115K–$150K, with strong rental income potential.
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Jackson Carter Design Build offers home addition services including basement remodels, master suites, sunrooms, second-story additions, garage builds, and kitchen expansions using an integrated design-build approach for functional, customized living spaces.
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Maya Construction Group is a Chicago-based design-build contractor specializing in home additions and remodeling. Licensed and insured, they handle permits, zoning, and inspections while offering owner-supervised project management for kitchens, bathrooms, and basement finishing.
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Foster Dale Architects designed a sustainable ADU coach house in Chicago, featuring a garage with dwelling unit above. The project incorporates geothermal heating, high-performance envelope, and recycled materials under Chicago's ADU ordinance.
read moreIllinois is a state of remarkable contrasts, from the dense urban environment of Chicago to the sprawling rural communities of central and southern Illinois. This diversity creates a uniquely complex environment for ADU contractors in Illinois, as zoning laws, building codes, and permitting requirements vary significantly from one municipality to the next. Unlike states with statewide ADU legislation, Illinois largely leaves ADU regulations to local governments, meaning a contractor working in Chicago faces entirely different rules than one operating in Springfield or Naperville. Understanding these local nuances is essential for any accessory dwelling unit contractor in Illinois.
In 2020, the City of Chicago passed its landmark Accessory Dwelling Unit Ordinance, which expanded ADU allowances across five pilot zones throughout the city. This ordinance allows homeowners to add coach houses, basement apartments, and attic conversions as legal dwelling units. For ADU builders in Chicago, this opened up a significant new market. However, contractors must be well-versed in Chicago's specific requirements, including:
Illinois does not have a single statewide general contractor license, but ADU contractors in Illinois must hold appropriate trade licenses depending on the scope of work. Electricians, plumbers, and HVAC technicians are required to hold state-issued licenses. Additionally, many municipalities require contractors to register locally before pulling permits. In Chicago, contractors must be registered with the Department of Buildings. Hiring a licensed ADU contractor in Illinois ensures that all work meets local code requirements and protects homeowners from liability.
Experienced ADU construction companies in Illinois typically offer a range of unit types to suit different property configurations and homeowner goals. Common ADU types include:
When searching for a qualified ADU contractor in Illinois, homeowners should prioritize professionals with demonstrated experience navigating local permitting processes, strong knowledge of Illinois building codes, and a portfolio of completed ADU projects. Request references, verify licensing credentials, and ensure the contractor carries general liability and workers' compensation insurance. A skilled Illinois ADU builder will guide you through design, permitting, and construction, making the process as seamless as possible while maximizing the value of your investment.