Basement Conversion

1 Degree Construction is a Los Angeles ADU builder & home addition contractor. Services include detached ADUs, garage conversions, second-story additions & in-law suites. Projects range from $30K to $150K+.

Denver ADUs (granny flats, garage conversions, in-law units) offer affordable housing density solutions. DL Engineering Inc. provides structural engineering, design, and permitting services for Denver accessory dwelling unit projects.

Golden State ADUs is a Sacramento-based full-service ADU contractor offering design, permitting & construction. With 10+ years experience and 100+ projects, they build detached ADUs, in-law suites & backyard cottages across California.

Payne & Tompkins Design is Northeast Ohio's premier design-build renovation firm. Founded in 2018, they offer full-service renovations, ADU construction, and structured design processes, ensuring quality craftsmanship and client-focused results.

Expert ADU builders serving Massachusetts homeowners. Services include detached ADUs, garage conversions, basement units & in-law suites. Fully permitted, code-compliant builds. Costs from $80K. Serving Boston, Cambridge, Worcester & statewide.

Pro's Edge Small Homes is a licensed ADU contractor in MA & NH with 20+ years experience. They offer turnkey design, permitting & modular construction of granny flats, in-law suites & backyard cottages, including a free property evaluation.

Y.O.R. Construction & Investments is a licensed Southern California general contractor (Lic. #978430) offering residential & commercial services including remodeling, room additions, pool construction, and ADU/garage conversions.

Laursen Builders specializes in ADU construction in Oregon, offering detached backyard cottages, garage conversions, basement conversions, and bump-out additions. As experienced ADU contractors, they help homeowners navigate Oregon's evolving ADU regulations.

Tweto Architecture specializes in ADU design, including detached ADUs, garage conversions & basement units. Serving Portland, Vancouver & Bend, they help homeowners add rental units, in-law suites & backyard cottages while navigating local zoning rules.

Twin Brothers Group is a licensed framing contractor in Washington State specializing in ADU, DADU, garage conversions, and home additions across King and Snohomish County, serving Seattle-area GCs and owner-builders.

Aldridge Construction builds ADUs in Salinas, CA—detached, attached, garage conversions & interior units. Projects cost $150K–$300K, take 4–8 months, and include full permitting support. Free consultations available.

Beantown Builders, Inc. is a Greater Boston ADU contractor offering full-service design, permitting, and construction. Projects include detached ADUs, garage conversions, and in-law suites, with budgets from $15,000 to $1M+.

Victory Construction Services Inc. builds ADUs in Rhode Island, including garage conversions, basement ADUs, and detached units. Family-owned since 2016, licensed, insured, with 15+ years experience and a 1-Year Workmanship Guarantee. Free estimates available.

Green Bee Construction Inc builds high-end ADUs, custom homes, additions, and renovations for Nevada County homeowners who want quality they can trust. Based in Grass Valley, we bring twenty years of local permitting expertise — including septic systems, setback rules, and zoning requirements specific to the foothills — and a contractor who puts your interests first, every time. No runaround. No surprises. Just exceptional craftsmanship and straight communication from start to finish.

AAA Home Improvements is a Denver ADU contractor building detached ADUs, garage conversions, basement units & in-law suites across the Front Range. They manage design, permitting & construction for homeowners in Denver, Lakewood, Arvada & Littleton.