DeMarco Builders is a licensed general contractor since 1996, offering residential and commercial construction, custom homes, ADUs, remodels, and additions. Using critical path management, they deliver projects faster while maintaining quality.
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Pacific Homes Direct in Woodland, WA offers customizable ADUs starting at $49,999. Serving Western Washington and Oregon, they provide granny flats, in-law suites, and backyard cottages with full-service support and factory warranty included.
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Shelter Solutions, Portland's trusted ADU builder since 1997, has completed 250+ accessory dwelling units. Offering full design-build services—from permits to occupancy—they specialize in custom detached ADUs, backyard cottages, and in-law suites across the Portland Metro area.
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Portland ADU Design & Build is a licensed ADU contractor serving Portland & the Willamette Valley. Specializing in detached ADUs, garage conversions & basement ADUs, they manage design, permitting & construction for lasting property value.
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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.
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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.
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With over 17 years of construction experience in the Portland metro area, Boss PDF helps clients turn underused space—like garages, basements, and backyards—into fully livable dwellings that add long-term value.
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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.
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Accessory Dwelling Units (ADUs) add self-contained living space to existing properties. Rain Creek Construction serves Clark County homeowners with ADU builds, including garage conversions, basement apartments & detached units, backed by 10+ years of custom home experience.
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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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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.
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Chumbley Construction is a full-service ADU contractor offering turn-key solutions including garage conversions, in-law suites, detached ADUs, and Airbnb-ready units. They handle permits, design, and construction. Free estimates available.
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SLS Custom Homes and Remodeling is a licensed general contractor in Tigard, Oregon, serving Portland metro since 1983. Services include custom home building, kitchen and bathroom remodeling, room additions, and ADU construction.
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Arciform is a Portland-based ADU design/build firm specializing in accessory dwelling units, including garage conversions, detached ADUs & in-law suites. They handle permits, historic properties & full construction.
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.