ADU Contractors

Northwest ADU builds custom detached ADUs, garage conversions & basement ADUs across Western Washington. Serving King, Pierce & Snohomish Counties with full-service ADU construction, build-ready plans & permit management.

Patco Homes offers full-service ADU construction, managing feasibility, design, permits, and build. Ideal for granny flats, in-law suites, or detached ADUs, they guide homeowners through every step with one dedicated team.

Lusso Design & Build is a licensed San Diego ADU contractor specializing in ADUs and JADUs. They handle design, permits, and construction, ensuring compliance with California regulations while helping homeowners add rental income or flexible l... read more

Edri Construction, Inc. is a Walnut Creek-based ADU contractor serving the Bay Area. They specialize in garage conversions, detached ADUs, attached additions, in-law suites, and JADUs, handling design, permitting, and project management.

ADUs (accessory dwelling units) are self-contained homes on existing properties. California's 2020 laws simplified ADU permits statewide. Alpha ADU Solutions, a San Francisco-based ADU builder with 100+ team members, specializes in granny flats, g... read more

Granny Homes, founded by Jason Lewis, is a Sacramento-based ADU contractor specializing in attached ADUs, detached backyard cottages, and garage conversions. They offer full-service design, permitting, and construction for functional, affordable a... read more

Portland, ME design-build firm O'Brien Wood & Iron has offered expert construction, renovation, historic restoration & custom millwork since 2008. With 60+ years combined experience, they serve residential & commercial clients with qua... read more

Mills Builders Inc is a Sacramento-based residential construction firm founded in 1999. Specializing in ADU construction, home renovation, in-fill development, and whole-house builds, they serve Sacramento's historic neighborhoods with decades of ... read more

Wis Builders offers residential and commercial construction services including ADU construction, home additions, deck building, bathroom remodeling, shed installation, drywall, painting, and paver installation. Known for quality workmanship and on... read more

BuildX is a premier ADU builder in Southeastern Massachusetts with 40+ years of experience and $450M+ in projects. Offering custom stick-built ADUs, a 100-day build guarantee, and transparent pricing starting from $254,540.

California Dream Builders specializes in ADU design and construction, offering end-to-end services including architectural design, permitting, and full construction management. They build detached ADUs, granny flats, in-law suites, and backyard co... read more

Elmntl builds modular ADUs across Denver and Colorado's Front Range. Specializing in detached ADUs, garage conversions, and in-law suites, they handle zoning, permitting, and installation with a 10-year structural warranty.

ADU Resource Center is a Glendale, CA-based ADU contractor with 600+ completed units. They offer full-service ADU building, including design, permitting, financing, and construction of detached, attached, and garage conversion ADUs across Southern... read more

DHRH Construction builds ADUs, guest houses, garage conversions, and casitas in Santa Barbara. They handle detached, attached, junior ADUs, and garage conversions across city, Montecito, and coastal jurisdictions under one contract.

Horizon Remodeling Inc. is a full-service residential remodeling company offering kitchen, bathroom, roofing, flooring, painting, and ADU conversions. Dedicated project managers coordinate all trades, keeping projects on schedule and within budget... read more