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.
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Comprehensive ADU Solutions
Whether you're looking to add rental income, house a family member, or increase property value, we have the expertise to bring your vision to life.
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.
Featured ADU Projects
See how we've transformed properties across Portland, Vancouver, and the Oregon coast.
Modern Backyard ADU
Coastal Retreat Cottage
Urban Garage Conversion
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.”
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!”
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.”
Emily C.
Beaverton, OR
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.
Request Your Free Consultation
Tell us about your project and we'll get back to you within 24 hours.