Attached ADU near Beaverton, OR

Conrad Construction is Portland's trusted ADU builder with 20+ years of experience. Specializing in backyard cottages, garage conversions, granny flats & detached ADUs, they handle permits, design & construction to boost property value.

JCS Construction LLC builds custom ADUs in Oregon, including detached backyard cottages, granny flats, garage conversions, basement conversions, and pole building ADUs. They handle both standard and non-traditional structures with quality craftsmanship.

Cornerstone Builders Inc offers full-service ADU construction, including custom design, utility connections, and interior finishes. Specializing in detached ADUs, garage conversions, and JADUs, they use energy-efficient materials for functional, livable spaces.

Lamont Bros. Design & Construction is a Portland, Oregon ADU contractor offering full design-build services. They help homeowners plan and build accessory dwelling units, including detached ADUs, garage conversions, and JADUs for rental income or flexible living.

TaylorSmith Sustainable Construction is a Portland, Oregon contractor specializing in sustainable new homes, renovations, energy retrofits, and ADU construction. All new builds target DOE Net Zero Energy Ready certification.

Triangle Bar Group understands that embarking on an ADU project can feel overwhelming, especially with so many options, decisions, and different Portland ADU builders to choose from. That’s where they come in.

Signature ADU is an experienced ADU builder offering full-service design and construction. Their team includes experts in architecture, general contracting, and project management, handling detached ADUs, garage conversions, granny flats, and in-law suites from start to finish.

Westside ADU Builders is a licensed ADU contractor in Beaverton, OR, offering detached ADUs, attached ADUs, garage conversions, JADUs, and home additions. They manage design, permits, and construction from start to finish.

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.

VDC Builders Inc specializes in ADU design & construction, including backyard cottages, in-law suites & rental units. Services cover flooring, kitchen & bathroom remodels, custom home building & cabinet refinishing.

Neil Kelly designs & builds ADUs in the Northwest, including detached cottages, garage conversions, basement/attic conversions & attached units. Expert team handles permits, local regulations & custom design for rental income, guests or family housing.

Keyser Construction Inc is a Portland, OR ADU contractor since 1996. They build detached cottages, garage conversions, basement & attic ADUs. Licensed, bonded & insured, offering free estimates and permit handling across the Portland metro area.

Harka offers ADU design, consulting, and permitting services with 18+ years of experience. Services include feasibility reports from $785, zoning review, schematic design, construction documents, and energy modeling to reduce costs and carbon footprint.

Rybak & Company LLC builds ADUs in Vancouver, Camas, Washougal & Portland Metro. Services include detached ADUs, garage conversions & in-law suites. Projects start at $175K–$250K+. Free estimates available.

With over 50 years in residential & commercial construction, house lifting, and house moving - you can rest assured that your project will be handled with insight and care. At Emmert International, we’re here to make your ADU project a success. Give us a call today!