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MONARKADU Design + Build
Beautiful modern ADU in Pacific Northwest backyard
Portland & Vancouver's Premier ADU Builder

Custom ADU Design-Build for Portland & Vancouver

From tiny homes to cottage clusters, we design and build beautiful accessory dwelling units that maximize your property's potential. Full-service, permit to finish.

Licensed & Bonded
Insured
Local Experts
Since 2010

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ADUs Built

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Years Experience

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Client Satisfaction

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Service Areas

Monark ADU Design + Build construction team at work
Why Monark ADU Design + Build

Portland & Vancouver's Trusted ADU Experts

Full-Service Design-Build

From architectural plans to final walkthrough, we handle every aspect of your ADU project.

Local Permit Expertise

Deep knowledge of Portland, Vancouver, and coastal Oregon ADU regulations and incentives.

SDC Waiver Specialists

We help Portland homeowners save up to $36,000+ through the System Development Charge waiver program.

Transparent Pricing

Detailed estimates with no hidden costs. We keep you informed at every step.

Sustainable Building

Energy-efficient designs using sustainable materials, reflecting Pacific Northwest values.

Our Work

Featured ADU Projects

See how we've transformed properties across Portland, Vancouver, and the Oregon coast.

Modern Backyard ADU
Detached ADU

Modern Backyard ADU

SE Portland, OR650 sq ft
Coastal Retreat Cottage
Backyard Cottage

Coastal Retreat Cottage

Astoria, OR480 sq ft
Urban Garage Conversion
Garage Conversion

Urban Garage Conversion

Vancouver, WA520 sq ft
Testimonials

What Our Clients Say

The team at Monark ADU Design + Build made the entire process seamless. From permits to final walkthrough, they handled everything. Our new backyard cottage is perfect for rental income.

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Sarah M.

Portland, OR

We converted our garage into a beautiful living space for my mother. The attention to accessibility features was incredible. Highly recommend!

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James R.

Vancouver, WA

Professional, knowledgeable, and on schedule. They guided us through Portland's ADU regulations and saved us thousands with the SDC waiver program.

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Emily C.

Beaverton, OR

Service Areas

Serving the Pacific Northwest

We build ADUs across the Portland-Vancouver metro area and along the beautiful Oregon coast.

Portland, OR

All neighborhoods

Vancouver, WA

Clark County

Wheeler, OR

Tillamook County

Astoria, OR

Clatsop County

Seaside, OR

North Coast

Ready to Build Your Dream ADU?

Get a free consultation and detailed estimate for your ADU project. Our local specialists are ready to help you navigate permits, design, and construction.

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