DADU Construction in Seattle, WA

Most residential lots in Seattle's Neighborhood Residential zones are eligible for a DADU. Your specific lot size, setbacks, and any environmental overlays will determine what is possible on your property.

Seattle homeowners use DADUs as long-term rentals, multigenerational living quarters, or private guest spaces. There is no owner-occupancy requirement, so you can rent both your primary home and the DADU if you choose.

Yes, Framework Construction builds DADUs across Seattle, Bellevue, Kirkland, Redmond, Sammamish, Issaquah, and the surrounding areas. Each city has its own zoning rules, and we work through those details as part of the project process.

Seattle allows a detached ADU of up to 1,000 square feet of gross floor area as of right. This limit is also protected at the state level under Washington House Bill 1337.

No, you do not need to vacate your primary home during DADU construction. The new structure is built separately in your yard, so your main residence stays occupied throughout the build.

A DADU involves structural framing, mechanical systems, finish work, and coordination across multiple trades, all of which must meet Seattle building code. A general contractor manages that coordination, keeps the work sequenced correctly, and makes sure the details are handled properly from the start.