Mighty ADU Company is a trusted ADU contractor in Portland, OR, specializing in designing and building accessory dwelling units. They manage everything from planning and permitting to construction, ensuring quality, transparency, and stress-free results for homeowners.
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Suite Additions Portland specializes in ADU construction, garage conversions, home additions, and accessibility remodeling in the Portland metro area. Led by Tim Jorgens (CCB #201364), they offer full-service design, permitting, and build solutions.
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Clarkbuilt is a Portland, Oregon residential contractor specializing in custom homes, remodels, additions, and ADU construction. Founded in 2006, they offer expert accessory dwelling unit building, custom cabinetry, and serve clients across Oregon and Washington.
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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.
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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.
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Gencon is a family-owned ADU contractor serving Clackamas County, OR. They build detached ADUs, garage conversions, in-law suites & JADUs. Full-service from design to move-in-ready finish.
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Cronen Building Co. specializes in accessory dwelling units (ADUs), including granny flats, garage conversions, and backyard cottages. They guide homeowners through design and construction, delivering quality ADUs for rental income, in-law suites, or extra living space.
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Integrity Timber Frame offers custom prefabricated timber frame home, cabin, and ADU kits in South Dakota. Using their TruFit™ System and SIPs panels, they deliver strong, energy-efficient, sustainable structures with faster assembly and potential cost savings.
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As a premier ADU contractor in Portland, Sert Construction specializes in designing and building high-quality, functional ADUs. Whether you're considering an added space for rental income, additional family space, or a home office, their team of experienced ADU builders ensures a seamless integration of these units into your existing property.
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Born and Raised Construction builds ADUs in Portland, including detached units, garage conversions, backyard cottages & in-law suites. Benefits include rental income, aging in place & increased property value.
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COOPER Design Build offers custom ADU construction in Portland, OR. With 30+ years of experience, they handle design, permitting, zoning, and full construction management for detached accessory dwelling units up to 800 sq ft.
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Aforma Design Studio offers white-label architectural design, rendering, and preconstruction services for builders, developers, and homeowners across the US, including ADUs, renovations, and new construction, delivered under your brand.
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ADU-PDX is a Portland-based ADU builder with 30+ years of experience. They specialize in garage conversions, detached ADUs, granny flats & in-law suites, handling permits and zoning for hassle-free builds across the Portland metro area.
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Shelter Solutions is Portland's trusted ADU contractor since 1997, with 250+ completed projects. Specializing in detached ADUs, backyard cottages & in-law suites, they offer full design-build services, permit handling & expert guidance throughout Oregon.
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Home Remodel Portland builds code-compliant ADUs including garage conversions, backyard cottages, and basement units. They handle permits, zoning, and inspections with local expertise, offering a clear process and three-year warranty.
read morePortland, Oregon has long been recognized as one of the most ADU-friendly cities in the United States. Since 2010, the city has waived System Development Charges (SDCs) for ADUs attached to or detached from single-family homes, significantly reducing construction costs for homeowners. This forward-thinking approach has made Portland a national model for urban density and housing affordability. Working with experienced ADU contractors in Portland is essential to navigating the city's unique permitting landscape and maximizing the potential of your property.
Portland allows ADUs in most residential zones, including R1, R2, R2.5, R3, R5, and R7 zones. However, building an ADU in Portland requires careful attention to local codes enforced by the Portland Bureau of Development Services (BDS). Key regulations include:
Hiring a qualified ADU contractor in Portland, Oregon means partnering with a professional who understands the city's specific permitting process, design standards, and construction requirements. A skilled contractor will handle everything from initial site assessment and architectural design to permit applications through the BDS and final construction. Portland's older housing stock — much of it built before 1950 — often presents unique structural and utility challenges that experienced local contractors are well-equipped to address.
Portland ADU contractors commonly build several types of accessory dwelling units to suit different property layouts and homeowner goals:
When selecting an ADU contractor in Portland, OR, look for professionals who are licensed with the Oregon Construction Contractors Board (CCB), carry proper liability insurance, and have a proven portfolio of completed ADU projects in the Portland metro area. Local expertise matters — a contractor familiar with Portland neighborhoods like Sellwood, Hawthorne, or St. Johns will better understand soil conditions, neighborhood design guidelines, and utility connection requirements specific to those areas.