If you’ve been looking for a modern, stylish ADU for your backyard, you’ve come to the right place. Relevant Buildings is an ADU builder in the Portland, Oregon area. They build ADUs throughout Oregon and Washington. Their goal is to make your home building journey as easy as possible.
read more
MyADU is a licensed ADU contractor in Vancouver, WA, specializing in custom accessory dwelling units across the Pacific Northwest. Founded in 2019, they offer design, permitting, and turnkey builds, completing most projects in 6–9 months.
read more
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.
read more
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.
read more
Das Chapin Design specializes in ADU design, garage & basement conversions, and general contracting. Offering permit support, construction consultation, and full build services via ADU Design & Build, LLC, they create efficient, livable spaces in Portland, Oregon.
read more
Aim High ADU Solutions is a trusted ADU contractor in Hillsboro, OR, specializing in accessory dwelling unit construction. They offer expert planning, quality craftsmanship, and client-focused service to help homeowners expand their living space efficiently.
read more
Reborn Construction LLC specializes in garage conversions in Portland, transforming underused spaces into ADUs, rental units, and in-law suites. Fully compliant with local zoning codes, they handle permitting, structural upgrades, and all finish work.
read more
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.
read more
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.
read more
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.
read more
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.
read more
Accessory Dwelling Units are a great way for Mississippi Avenue homeowners to make the most of their property. Whether you need extra space for family, a home office, or a way to generate rental income, our team at Home Services Plus handles everything—from permits to finishing touches.
read more
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.
read more
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.
read more
Roost Homes LLC is a Portland-based contractor specializing in ADU design and build, home additions, and remodels. They offer energy-efficient detached ADUs, garage conversions, and full renovations tailored to client needs across the Portland metro area.
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.