Hendren Custom Homes builds ADUs in Valparaiso & Porter County, NW Indiana. From detached backyard cottages to garage conversions, costs range $40K–$130K with 4–8 month timelines. Expert guidance on zoning, permits & custom design.
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For over three decades, Keen Construction has been rooted in family values and exceptional craftsmanship. Founded by Darren Trybalski, whose father and grandfather were both builders, this deep-rooted connection to construction shaped our commitment to quality and attention to detail from the very beginning.
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Chicago's Assembly Squad Remodeling LLC specializes in attic conversions & ADUs. Services include bedroom suites, rental units ($1,500–$2,500/mo), home offices & more. Pricing starts at $50/sq ft. Permits & compliance managed.
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Chicago legalized accessory dwelling units (ADUs) in 2020. Via Chicago Architects designs coach houses, granny flats & basement apartments for rental income, home offices, or guest suites on existing residential properties.
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Moss Architecture is a leading Chicago ADU contractor specializing in accessory dwelling units, coach houses, and garage conversions. Following the 2021 Chicago ADU ordinance, they design detached ADUs, in-law suites, and backyard cottages across the city.
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Chicago made a landmark move in 2021 when it passed its Accessory Dwelling Unit (ADU) Ordinance, reopening the door to coach houses, garage apartments, and basement units that had been banned since 1957. This historic policy shift created an entirely new market for ADU contractors in Chicago, Illinois, making it essential to work with professionals who understand the city's specific zoning laws, permit requirements, and neighborhood pilot zones. Whether you're in Pilsen, Logan Square, or Woodlawn, finding the right ADU contractor can make or break your project.
One of the most unique aspects of building an ADU in Chicago is the pilot zone system. The city is divided into five designated pilot zones where ADU construction is currently permitted. These zones were strategically selected to address housing affordability and density in specific neighborhoods. Experienced Chicago ADU contractors must be well-versed in which zones allow which types of units, as regulations differ depending on your location. Working with a contractor unfamiliar with these boundaries can result in costly delays or outright project denial.
Chicago's ordinance permits two primary categories of accessory dwelling units:
Skilled ADU builders in Chicago will assess your property to determine which type of unit is feasible given your lot size, existing structure, and zoning classification. Properties in RS-3 zoning districts, which are common in Chicago's residential neighborhoods, are frequently eligible for ADU development.
Any reputable ADU contractor in Chicago will handle the full permitting process through the Chicago Department of Buildings (DOB). This includes architectural drawings, zoning approval, and multiple inspections throughout the construction process. Chicago's building code has specific requirements around:
Hiring a locally experienced ADU contractor in Chicago, IL is critical to the success of your project. Local contractors have established relationships with city inspectors, understand neighborhood-specific challenges like older building stock and limited lot sizes, and are familiar with Chicago's sometimes complex bureaucratic processes. They can also help homeowners take advantage of the city's Affordable Requirements Ordinance (ARO) incentives where applicable.
If you're considering adding an ADU to your Chicago property, start by consulting with a licensed, insured, and locally experienced contractor who specializes in Chicago's unique ADU landscape. The right professional will save you time, money, and stress from start to finish.