Cronen Building Co.

4909 SE Cooper St, Portland, OR 97206 16.1 miles

Cronen Building Co. is an expert ADU builder specializing in granny flats, garage conversions, backyard cottages, and detached ADUs. They deliver custom accessory dwelling units that boost property value and functionality.

JRW Construction LLC

24121 South Peach Road, Canby, OR 97013 21.5 miles

Eco-Friendly

JRW Construction LLC offers full-service ADU construction, managing permits, inspections, and trade scheduling. They build detached ADUs, in-law suites, granny flats, garage conversions, and JADUs with quality finishes and energy-efficient systems.

Soft Studios

1804 Northeast Martin Luther King Junior Boulevard, Portland, OR 97212 13.3 miles

10 years in business Eco-Friendly

SQFT Studios, founded in 2015, is Portland's leading ADU design-build firm. Specializing in detached ADUs, garage conversions & backyard cottages, they deliver Earth Advantage Platinum-certified, sustainable builds tailored to every homeowner.

Propel Studio

422 Northeast 79th Avenue, Portland, OR 97213 17.1 miles

Brothers Lane Builders

Salem, OR 40.9 miles

Brothers Lane Builders, LLC specializes in ADU (Accessory Dwelling Unit) construction for homeowners in Salem, Oregon. Whether you want a backyard cottage, in-law suite, or rental unit, our experienced team guides you through every step—from planning and permitting to expert building and finishing.

RG ProBuilders

21211 Northeast 72nd Avenue, Battle Ground, WA 98604 25.9 miles

For more than 15 years, we’ve turned backyards into beautifully crafted living spaces. From permits to finishing touches, our team knows every step inside and out. Choose the classic charm of our Traditional Series, the clean lines of our Modern Series or the efficiency and flexibility of our Urban Series. Build with the crew that wrote the ADU playbook: RG ProBuilders.

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What you need to know

Searching for top Detached ADU ADU Contractors in Hillsboro, Oregon? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Detached ADU ADU Contractor in Hillsboro ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Detached ADU professionals can guide you through every step.

Hillsboro homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Detached ADU experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Detached ADU ADU Contractors in Hillsboro, Oregon, and get started today.

Detached ADU near Hillsboro, OR