ADU Contractors

Step-up Construction is a San Jose ADU contractor specializing in garage conversions, attached additions, and detached backyard ADUs. Costs range from $80K to $475K. They guide homeowners through permits, zoning, and San Jose's ADU regulations.read more

Kyvos Construction offers home remodeling & ADU construction in Concord, CA. Services include kitchen & bathroom renovations, room additions, garage conversions, detached & attached ADUs, granny flats, and in-law suites.

MHP Construction offers ADU construction services in California, including detached units, conversions, and in-law suites. ADUs provide rental income, family housing, and flexible living—without buying extra land.

Keyser Construction Inc is a Portland, OR ADU contractor since 1996. They build detached cottages, garage conversions, basement & attic ADUs. Licensed, bonded & insured, offering free estimates and permit handling across the Portland metro... read more

Veteran-owned US ADU & tiny home builder serving San Diego & LA County. Premium materials, ANSI A119.5-compliant builds, Class A fire ratings, 3D design, site assessment, permitting support & NOAH/RVIA certification included.

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.

Home Remodel Portland builds code-compliant ADUs including garage conversions, backyard cottages, and basement units. They handle permits, zoning, and inspections with local expertise, offering a clear process and three-year warranty.

Hill Country Casitas, a branch of David Barr Builder, specializes in casitas and ADUs in Texas Hill Country. Expert casita, backyard cottage & granny flat builder focused on homeowner satisfaction.

Baystate Group Builders Inc offers residential remodeling services including basement finishing, bathroom renovations, deck construction, carpentry, and painting. Led by Victor, the team is known for professionalism, clear communication, and quali... read more

Neil Kelly Washington offers ADU design and build services in the Northwest, including detached ADUs, garage conversions, and attached units. Their team navigates local permits, balances design with functionality, and helps homeowners add value th... read more

Seattle's 2019 ADU law changes made it easier to build accessory dwelling units on single-family lots. DADUs can't exceed 50% of the main home's size. No parking required. New detached ADUs start around $350,000.

Easthope Design is a Fort Collins ADU design firm led by architect Richard Esteb. Specializing in custom ADUs, garage conversions & granny flats across Northern Colorado, they handle design, permits, zoning & construction supervision.

At ADU San Mateo, we combine architectural insight, construction experience, and deep knowledge of Bay Area zoning laws to deliver high quality accessory dwelling units from design through move in. Our mission is simple: to make building your ADU ... read more

Edrington and Associates helps property owners add ADUs—garage conversions, detached units, or Junior ADUs. They offer ADU Feasibility Studies in three packages and a free 15-minute consultation to explore options.