Detached ADU

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.

Caine and Company is a Scottsdale-based design-build firm specializing in custom Casitas, guest houses, ADUs, and pool houses. Founded 22 years ago, they offer fixed-price contracts, in-house design, and full construction management across Phoenix... read more

Your Prefab ADU will be delivered and installed to your site. All ready to enjoy a sustainable home to last for generations.

Los Angeles Advanced ADU Builders offers full-service ADU construction across LA, including garage conversions, detached units, JADUs & prefab ADUs. With 20+ years experience & 500+ builds, they handle design, permits & zoning complian... read more

Salt City Cabinetry & Remodeling builds ADUs and home additions in Salt Lake City. Services include garage conversions, detached ADUs, and room additions. Projects start at $90,000, take 4–7 months, and include permits and zoning support.read more

Queen Boss Construction builds ADUs in Charlotte, NC—detached cottages, attached suites, and garage or basement conversions. With 20+ years of experience, they handle design, permits, and construction for rental units, in-law suites, and more.read more

Skorco Inc is a Duluth, MN construction company with 12+ years of experience in custom home building, remodels, ADUs, garage conversions, and commercial construction. Serving Duluth and Hermantown with a price guarantee.

ASL Remodeling is a California licensed ADU contractor (CSLB #1060310) with 20+ years experience and 300+ completed projects. Services include detached ADUs, garage conversions, granny flats, JADUs, and in-law suites with full design-build support... read more

Proteus Homes is a custom home and ADU builder with 30+ years of experience in the Southwest US. They offer full-service ADU construction, including design, permitting, and panelized off-site fabrication, with move-in-ready homes in under three mo... read more

Scott Olson Homes offers additions and ADU construction designed to match your home’s style while boosting functionality. Whether you need a garage, guest suite, or private rental space, we deliver structures that blend seamlessly into your prop... read more

Perfect ADU & Remodeling Inc specializes in ADU construction, including detached ADUs and garage conversions. Services cover design, permitting, and build. ADUs boost property value, enable rental income, and support multi-generational living.... read more

Honorato Company offers a structured construction process in Boston, covering ADUs, garage conversions & renovations. From consultation to final walkthrough, they ensure transparency, permitting, design, and clear communication throughout.

BOLD Construction builds ADUs in Chapel Hill, Orange & Chatham County. Costs range $350–$500/sqft. Services include detached ADUs, garage conversions & in-law suites with a transparent fixed-price design-build process.