"The work this team provides is exceptional!"
Add rental income, multi-generational living, or a home office. Washington ADU laws make it easier than ever.
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Rated by Seattle Homeowners
See ADU Types"The work this team provides is exceptional!"

Washington's ADU laws have never been more favorable for homeowners. ADU construction Seattle WA residents invest in is now more accessible — and more profitable — than ever, thanks to streamlined permitting and relaxed setback requirements. Homeowners searching for ADU contractors near me choose Da Vinci for our expertise.

A fully independent unit on your property — the most valuable ADU type. Ideal for rental income or extended family. ADU companies near me recommend detached units for maximum ROI.

Transform your existing garage into a livable ADU. Lower ADU Seattle cost, faster permitting, excellent ROI for the Greater Seattle Area.

An addition to your main home with its own entrance. Efficient use of space with shared wall construction savings.

Convert an existing room within your home into a studio-style unit with its own exterior entrance. Max 500 sq ft.

Add a second story to your garage or home for a premium ADU that maximizes your property footprint.

A dedicated creative studio, home office, gym, or flex space. Adds value and versatility to your property.
We assess your lot, existing structures, setbacks, and utilities to determine what's possible — free of charge.
Our architect creates plans and submits to the City of Seattle. We track every step of the approval process.
Our licensed team handles all trades — foundation, framing, plumbing, electrical, insulation, drywall, finishes.
City final inspection passed. We hand over the keys with your Certificate of Occupancy and warranty documentation.
Find out exactly what you can build on your property — no obligation, no cost.