Christopher Strom Architects designs Accessory Dwelling Units (ADUs) in the Twin Cities, including detached backyard cottages, garage conversions, and in-law suites. Also known as granny flats or carriage houses, ADUs add self-contained living space to residential properties.
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White Crane Design:Build is an award-winning, woman-owned ADU builder and remodeling firm in the Twin Cities, MN. Founded in 2002, they specialize in ADU construction, garage conversions, and residential remodeling in Minneapolis and St. Paul.
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YardHomesMN builds panelized tiny homes & ADUs in Minnesota. Designs range 300–1,000 sq ft, priced $160K–$250K. Features SIP construction, solar options & 50% faster builds. Founded by Nichol Dehmer & contractor Jeremy Powers.
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FBC Remodel St. Louis Park offers home additions via a Design-Build approach, uniting architects and builders under one roof for accurate budgeting, guaranteed pricing, permit management, and seamless project coordination.
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Red Fox Remodeling builds ADUs in the Twin Cities, offering garage conversions, in-law suites & granny flats. Custom pricing, premium materials & app-based project tracking help homeowners boost property value & rental income.
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An accessory dwelling unit (ADU) is a self-contained home on the same property as a primary residence. Titus Contracting builds ADUs across Minnesota, offering design-build expertise for detached ADUs, in-law suites, and backyard cottages.
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Alchemy Architects, founded in 1992 in Saint Paul, MN, specializes in prefab homes, ADUs, and the weeHouse system. Their LightHouse line offers backyard cottages and granny flats, with 60+ projects completed across the US.
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Second Suite by Christopher Strom Architects specializes in ADU design and Tiny Homes across the Twin Cities. Services include backyard cottages, basement conversions, and in-law suites, with full support from feasibility to permitting.
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Hanson Design Build Remodel is a trusted ADU contractor serving Minneapolis and St. Paul with 17+ years of experience. Specializing in garage conversions, detached ADUs, and attached ADUs, they handle design, permits, and builds seamlessly.
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Skorco Inc is a Duluth, MN construction company with 12+ years of experience in custom home building, remodels, ADUs, garage conversions, and commercial construction. Serving Duluth and Hermantown with a price guarantee.
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Xtreme ADU LLC, based in Lake Benton, MN, builds prefabricated ADUs, tiny homes & casitas. Customizable flat-pack kits, Net-Zero options, 71+ years experience. Serving MN, SD, ND, IA & CA.
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Minnehaha Remodeling builds custom ADUs in Minneapolis, St. Paul & Twin Cities. Expert accessory dwelling unit builders handling permits, design & construction. Ideal for rental income, in-law suites & more.
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Sub Zero Construction, based in Moorhead, MN, offers residential remodeling services across Minnesota and North Dakota. With 30+ years of experience, they specialize in kitchens, bathrooms, flooring, tile, drywall, and custom carpentry. Licensed, insured, and free estimates available.
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Castle Building & Remodeling offers full-service ADU construction, handling demolition, utilities, framing, and interior finishing. Specializing in detached ADUs and granny flats, they deliver compact, functional, move-in-ready backyard homes.
read moreMinnesota's unique climate presents one of the most demanding environments for ADU contractors in the country. With temperatures that can swing from -30°F in winter to 100°F in summer, accessory dwelling units in Minnesota must be built to withstand extreme weather conditions. Experienced ADU contractors in Minnesota understand the critical importance of proper insulation, frost-depth foundations, and energy-efficient construction to meet both state building codes and the practical demands of Minnesota winters.
Minnesota has been progressively updating its approach to ADU development. In 2023, Minnesota passed legislation encouraging municipalities to allow ADUs in single-family residential zones. However, regulations can vary significantly by city and county. For example, Minneapolis and St. Paul have their own specific ADU ordinances that licensed ADU contractors must be thoroughly familiar with. Key regulatory considerations include:
Hiring the right ADU contractor in Minnesota is essential for a successful project. Minnesota requires all residential contractors to be licensed through the Minnesota Department of Labor and Industry (DLI). When selecting a contractor, homeowners should verify the following:
Skilled ADU builders in Minnesota work on a variety of accessory dwelling unit types suited to the state's housing needs and lot configurations. The most common types include detached ADUs, which are standalone structures in the backyard, attached ADUs that share a wall with the primary home, and garage conversions, which are particularly popular in the Twin Cities metro area. Basement conversions are also widely pursued, though contractors must address moisture management and egress window requirements carefully in Minnesota's high water table regions.
The cost of constructing an ADU in Minnesota typically ranges from $150,000 to $350,000, depending on size, type, location, and finish level. Higher costs are often associated with the need for enhanced insulation, heated foundations, and energy-efficient systems required for Minnesota's climate. Working with a knowledgeable Minnesota ADU contractor can help homeowners optimize their budget while ensuring the unit meets all state and local code requirements, ultimately adding long-term value to their property.