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.
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Straight Line Design and Remodeling LLC offers ADU design and build services in Portland, Oregon. Serving Beaverton, Tigard, Lake Oswego & Hillsboro since 2010, they build backyard cottages for rental income, multigenerational living & added property value.
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Top Form Contracting offers expert ADU construction in Corvallis, Oregon. Services include design, new builds, garage conversions, and JADUs. Licensed, permit-compliant, and affordable — ideal for adding rental income or flexible living space.
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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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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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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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ADU builder Amplified Renovations serves Portland, OR and Vancouver, WA, specializing in accessory dwelling units including backyard cottages, garage conversions, and basement ADUs. Costs range from $150K–$350K+, with rental income potential of $1,500–$2,500/month.
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Wolf Industries builds factory-constructed, code-compliant tiny homes delivered directly to your property. Ideal as a backyard cottage, granny flat, ADU, or in-law suite, their build-deliver-setup model simplifies small-space living.
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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.
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The Remodel Group is a Portland-based design-build firm specializing in ADU construction and whole house remodeling. Services include detached ADUs, garage conversions, and JADUs. Earth Advantage certified, they offer sustainable, budget-conscious builds.
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The Powell Group is a Portland-area custom home and ADU builder led by Mitch Powell, with 20+ years of experience. They've completed 500+ homes and 30+ ADU projects, offering expert construction from planning to completion.
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Portland ADU is a local contractor specializing in ADU building, basement, kitchen, and bathroom remodeling. They help Portland homeowners maximize space, increase property value, and navigate Portland Building Code with expert guidance.
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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.
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Neil Kelly Portland offers full ADU design and build services, including detached units, garage conversions, and basement conversions. They handle zoning, permits, and custom design for functional, energy-efficient accessory dwelling units.
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Backyard Blueprint is a Portland, OR family-owned ADU contractor with 20+ years of experience. Services include detached ADUs, garage conversions, and remodels. They offer 15+ floor plans and custom designs, managing permits to completion in 4–6 months.
read moreWilsonville, Oregon is one of the most carefully planned cities in the Portland metro area, known for its strong community design standards and proximity to major employers like Mentor Graphics and Xerox. This master-planned character means that ADU contractors in Wilsonville must navigate a unique set of local development codes that go beyond standard Oregon state requirements. Whether you're looking to build a detached ADU, an attached ADU, or convert an existing garage, working with an experienced Wilsonville ADU contractor is essential to ensuring your project meets all local standards.
Wilsonville falls under the jurisdiction of the City of Wilsonville Community Development Department, which enforces its own land use and zoning codes. Oregon state law (particularly HB 2001) requires cities like Wilsonville to allow ADUs in single-family residential zones, but the city may still apply specific standards. Key regulations that ADU contractors must address in Wilsonville include:
Hiring a local ADU contractor familiar with Wilsonville can save you significant time and money. Local contractors understand the nuances of the city's permitting process, including submitting plans to the Community Development Department and coordinating inspections. They are also familiar with Wilsonville's stormwater management requirements, which are particularly relevant given the city's location near the Willamette River and its commitment to environmental stewardship.
A qualified ADU builder in Wilsonville, Oregon will typically guide you through the following steps:
Adding an ADU to your Wilsonville property is a smart investment, whether for rental income, multigenerational living, or increasing property value. With the right ADU contractor in Wilsonville, OR, the process can be smooth and efficient. Be sure to choose a licensed, bonded, and insured contractor with proven experience in Oregon's ADU regulations and Wilsonville's specific development standards.