Prefab / Modular ADU

Elite Construction builds ADUs in Santa Cruz County, offering detached units, garage conversions & addition ADUs. Projects range 250–1,200 sq ft, cost $115K–$450K, and take 6–9 months. Free estimates available.

Kanga Room Systems is a Texas-based prefab builder offering backyard cottages, studios, and ADUs. Shell installs start at $44K; turnkey builds from $105K. Two styles: Modern and Cottage. Kit shipments available nationwide.

Nunley Custom Homes builds ADUs in Greenville, SC—detached units, garage conversions, basement & attic ADUs. Costs range $150–$400/sq ft. Full permitting, zoning, and construction management included. 34+ years experience.

Everlife Home offers ADU packages with 1-2 bedroom floor plans, full kitchens, and standard finishes. As a full-service ADU contractor, they manage the entire build, with optional upgrades, decks, and storage add-ons available.

ADU builder Amplified Renovations serves Portland, OR and Vancouver, WA, specializing in accessory dwelling units including backyard cottages, garage conversions, and basement ADUs. Costs range from $150K–$350K+, with rental income potential of ... read more

Georgia ADU Builder designs and constructs custom Accessory Dwelling Units and Backyard Getaways across Cobb, Fulton, Gwinnett, and surrounding Georgia counties. Services include detached ADUs, granny flats, in-law suites, and home offices.

Forge ADU Builders is a Birmingham-based contractor specializing in accessory dwelling units (ADUs), including backyard cottages, garage conversions, and in-law suites. They handle design, permits, and turnkey construction across Jefferson County.... read more

Cali ADU is a top Los Angeles ADU builder offering custom and pre-designed accessory dwelling units, garage conversions, and granny flats. Fixed pricing, fast permitting, and expert project management ensure stress-free builds from design to move-... read more

Seattle Tiny Homes, based in Buckley, WA since 2005, builds tiny houses, park models, and modular ADUs under 400 sq ft. Washington state-certified, they offer financing options and helped establish the Washington Tiny House Association.

Sweet-Haus Tiny Cabin Company builds quality tiny homes in Chesnee, SC, offering RVIA-certified and modular-certified cabins under 400 sq ft for full-time living, rentals, or in-law suites, plus expanding tiny home community developments like Trou... read more

Groysman Construction, a San Diego ADU contractor, builds detached units, garage conversions, and JADUs. Learn about CalHFA grants up to $40,000, 2023-2024 SB 897 permitting changes, and typical ADU costs ranging from $165,000 to $385,000.

LanCo Construction has built St. Petersburg ADUs since 1986, including garage apartments and in-law suites. Learn zoning rules, size limits, flood requirements, permitting costs, rental restrictions, and grant eligibility for accessory dwelling un... read more

An ADU (accessory dwelling unit) is a small secondary living space on the same property as a primary home. Also called granny flats or in-law suites, ADUs offer flexibility, affordability, and multigenerational living solutions.

ADU Building Systems LLC builds factory & site-built ADUs in Massachusetts, including detached, attached & converted units. Offering 10-year structural warranties, cost savings up to 50%, and full-service design to turnkey construction.read more

Revival Homes is a California ADU project manager handling planning, financing, design, permitting, and construction. They build detached ADUs, garage conversions, JADUs, and more, with costs ranging from $100K to $300K.