ADU Contractors

BIOS Homes is a Connecticut ADU contractor specializing in detached, attached, basement, and garage conversion ADUs. Using modular construction, they handle design, permits, and builds under CT Public Act 21-29.

SmartSpaces ADUs offers a simple 3-step process: choose a pre-designed ADU model, customize finishes, then let their team handle permitting and construction. Ideal for detached ADUs, granny flats, or casitas—delivered move-in ready.

Bela Development is an LA-based design-build firm with 15+ years specializing in ADU construction, garage conversions, detached ADUs, and JADUs. They manage design, permitting, and build under one roof, delivering legal living spaces that boost pr... read more

Mighty ADU Company is a trusted ADU contractor in Portland, OR, specializing in designing and building accessory dwelling units. They manage everything from planning and permitting to construction, ensuring quality, transparency, and stress-free r... read more

At SpecLand, we bring expertise and innovation to home renovations, with a focus on maximizing both functionality and value in New York’s unique urban landscape. Whether you’re looking to expand your home, create rental opportunities, or updat... read more

Peak Construction and Design LLC builds custom ADUs in Springfield, OR, including detached cottages, attached units, in-law suites, and rental spaces. Expert ADU contractor offering full design-to-build services tailored to your property.

Deharo Construction is a trusted ADU builder serving Livermore, Pleasanton, and Dublin. Specializing in accessory dwelling units, new construction, and home additions, they deliver custom granny flats, detached ADUs, and in-law suites across the T... read more

Small Cottages Hawaii, a division of Canaan Builders LLC founded in 1978, specializes in permitted ADU construction across Oahu. Offering custom and pre-designed backyard cottages compliant with Honolulu's 2015 ADU Ordinance, they provide quality ... read more

Peragallo Construction builds custom ADUs in Central & Southern Connecticut, including detached cottages, in-law suites, garage conversions & basement apartments. Serving Cheshire, Wallingford & Guilford. ADU costs range $150K–$350K.... read more

Terra ADU Builders is a Milwaukee ADU contractor offering turnkey accessory dwelling units. Three fixed-price models start at $149K. Services include zoning, permits, and full construction across Milwaukee, Wauwatosa, Shorewood, and Brookfield.read more

Virginia ADU construction by Commonwealth Contractors. Expert guidance on zoning, permits & building codes. Options include detached ADUs, garage conversions & basement units. Costs range $150–$300/sq ft. Boost property value & renta... read more

Stellar Construction & Remodeling builds ADUs in Damascus, OR, managing permits, design, and construction for rental units, guest houses, or in-law suites. They handle detached and attached configurations, ensuring full code compliance and cer... read more

Florida Made Tiny Homes is a family-owned ADU builder serving all of Florida with 30+ years of experience. They offer detached ADUs, shell units, pool houses, and custom homes built to Florida Building Code with hurricane protection.

South Land Remodeling is an LA-based ADU contractor with 20+ years of experience. They offer full-service ADU construction, garage conversions, room additions, and permit management across Los Angeles and the San Fernando Valley.

California Construction Center Inc. specializes in garage conversions and ADU services in Concord and San Francisco County. They transform garages into guest suites, rental units, and home offices, ensuring code compliance and quality craftsmanshi... read more