Attached ADU in Oregon

Lamont Bros. Design & Construction

18675 Willamette Drive, West Linn, OR 97068

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... read more

PSE Consulting Engineers Inc.

250 Main Street, Klamath Falls, OR 97601

ADUs boost property value, generate rental income, and support multi-generational living. From garage conversions to detached units, they offer flexible use. PSE Consulting Engineers Inc. helps navigate ADU permitting and design requirements.

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Home Services Plus (HSP)

12009 Northeast Marx Street, Portland, OR 97220

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 every... read more

Harka Architecture

7631 Northeast Glisan Street, Portland, OR 97213

18 years in business Eco-Friendly

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 foot... read more

Brahms Construction LLC

255 Thor Place, Junction City, OR 97448

Licensed

Brahms Construction LLC is a licensed ADU builder specializing in in-law suites, granny flats, rental units, and home offices. They handle design, permitting, and construction while respecting budgets and local ADU regulations.

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Gencon

Clackamas, OR 97027

Licensed 20 years in business Luxury Builds

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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Westside ADU Builders

1960 Northeast 25th Avenue, Beaverton, OR 97124

Licensed

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.

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Keyser Construction Inc

452 SW Alderwood Dr, West Linn, OR 97068

Licensed 29 years in business Eco-Friendly

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... read more

Chumbley Construction

15408 NW Energia St, Portland, OR 97229

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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Other cities in Oregon

• Albany
• Ashland
• Beaverton
• Bend
• Canby
• Clackamas
• Colton
• Corvallis
• Cottage Grove
• Estacada
• Eugene
• Grants Pass
• Gresham
• Hillsboro
• Junction City

What you need to know

Searching for top Attached ADU ADU Contractors in Oregon? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Attached ADU ADU Contractor in Oregon ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Attached ADU professionals can guide you through every step.

Oregon homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Attached ADU experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Attached ADU ADU Contractors in Oregon, and get started today.