ADU Contractors

JW Design Build specializes in custom home renovations and additions, including master suites, kitchens, home offices, and outbuildings. Their integrated design-build approach guides homeowners from concept to completion without relocating.

Calpacific Contracting builds ADUs, casitas & garage conversions across Riverside, Orange, LA & San Bernardino Counties. 80+ years experience. Full-service: permits, design, construction & inspections handled end-to-end.

Acorn Deck House builds luxury prefab ADUs in MA, featuring exposed beams & large windows. Options include 900 sq ft & 730 sq ft models. ADUs boost property value by 25–34% & generate rental income.

Boundless Tiny Homes builds attached ADUs in Madison, WI. Units range 300–700 sq ft with separate entrances, kitchens, and baths. Ideal for in-law suites, rentals, or multigenerational living. Free feasibility check available.

Bundle ADU is a California-based full-service ADU contractor offering custom accessory dwelling units from 400–1,200 sq ft, starting at $200/sq ft. Services include design, permitting, and construction with ~4-month build times.

ORO Coast Builders is an ADU contractor in Los Angeles & the Bay Area with 25+ years of experience. They build detached ADUs, garage conversions, basement conversions & JADUs—fully custom, no prefab.

Carson Homes builds custom accessory dwelling units for homeowners across Surprise and the West Valley. Whether you need a guest house, rental unit, or space for multigenerational living, Adam Carson manages the entire project from permitting through final walkthrough.

OT Bay Builders is a complete remodeling company with over 40 years of combined experience amongst our team. We’re expert Bay Area ADU builders in San Jose with a customer-first mindset. As a full-service ADU builder, you can trust us to remain by your side from the first consultation to the final walkthrough.

Green Remodeling Solutions (GRS) is a Los Angeles home remodeling company offering kitchen, bathroom, ADU construction, roofing, solar, and more. Licensed contractors guide homeowners through every project, including permits and zoning.

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.

Home Quality Remodeling Inc. is a licensed Bay Area general contractor (CSLB #838832) with 20+ years of experience. Services include kitchen & bathroom remodeling, room additions, ADUs, and outdoor living across California and New Jersey.

Alta Casa Remodeling is a Vancouver, WA ADU builder specializing in accessory dwelling units, garage conversions, in-law suites, and home additions. They also offer kitchen, bathroom, and full home remodels, backed by a one-year workmanship warranty.

Backyard House is an Austin, TX ADU builder offering fully custom, on-site accessory dwelling units. Fixed pricing includes permits, foundation, mini split, wired internet & design. Projects complete in 9–12 months.

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.

Cascella and Sons Construction Corp builds home additions and ADUs on Long Island. As a design-build firm, they manage design and construction under one roof, offering garage conversions, in-law suites, and detached ADUs tailored to Cape, Ranch, and Colonial-style homes.