Basement Conversion

Urbatect Development LLC is a California & Washington ADU contractor offering custom homes, garage conversions, JADUs & detached ADUs. 15+ years experience, 3,500+ projects, fixed pricing & 30% faster permits.

An Accessory Dwelling Unit (ADU) is a self-contained living space on a residential property. Massachusetts law now makes ADU construction easier. Aureli Construction offers full-service ADU building, from zoning research to completed construction.

Zelenka Development is a licensed ADU builder and custom home contractor in the Denver metro area, offering ADU construction, garage conversions, renovations, and integrated design services with full permitting support.

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.

JC Construction & Remodeling is a Sacramento ADU builder with 26+ years of experience and 426+ completed projects. Services include detached ADUs, garage conversions, room additions, and remodels across Sacramento, Roseville, Folsom, and nearby areas.

Home Sweet Home Remodeling converts basements into ADUs & in-law suites across St. Louis & St. Charles. Services include design, permitting, and construction of self-contained living spaces for multi-generational living or rental income.

Accessory Dwelling Units (ADUs) offer California property owners passive income, elderly care solutions, and property value growth. Since 2020 legislation, ADU permits are easier to obtain. Construction costs range $350–$450/sq ft, with rental income potential up to $4,000/month.

Hudson Pro Builders offers ADU construction in Chicago, Cook County, DuPage County & Lake County. Services include garage conversions, basement ADUs, in-law suites & backyard cottages, with full design, permitting & zoning support.

Turn-key ADU builder offering detached and attached accessory dwelling units, granny flats, backyard cottages, and in-law suites. Features include quartz countertops, luxury vinyl flooring, mini split HVAC, and full kitchen. Custom upgrades available.

Neil Kelly Portland offers full ADU design and build services, including detached units, garage conversions, and basement conversions. They handle zoning, permits, and custom design for functional, energy-efficient accessory dwelling units.

ADU Builders CT LLC, based in Westport, CT, specializes in custom ADU design and construction, tiny homes, and home remodeling. Licensed in Connecticut (#NHC.0018259) with 35+ years of experience, they offer detached, attached, basement, attic, garage, and pool house ADUs statewide.

FiveTen Construction & Design is a Massachusetts ADU contractor offering design, permitting, and construction services. They build detached, attached, basement, and garage ADUs, ensuring full compliance with MA building codes and zoning regulations.

Cascadia ADU builds attached, detached, garage & basement ADUs across King, Snohomish, Skagit & Chelan Counties, WA. Full-service design, permitting & construction completed in 8–10 weeks with 10+ years experience.

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 area.

Charleston ADU Co. builds accessory dwelling units in Charleston, SC. Services include detached ADUs, garage conversions, and basement conversions. Free site evaluation, 3D design, 6-month delivery guarantee, and flexible financing available.