Region guide / King County, WA
Find builders, designers and plan vendors to research for your project. Search by name, service or city, then review the evidence behind each listing.
Listings are drawn from public sources and may be incomplete or dated. They are not endorsements. Confirm ADU experience, service area and current licensing before hiring.
4 matching records · Showing 1–4
architect designer
Architectural portfolio includes backyard cottages and ADU designs. Confirm current plan availability and project scope directly.
ADU services described on the company’s website. Experience, current license and availability have not been independently verified.
Source record: 2026-09-08
View listing source ↗Provider websitecontractor
The company presents ADU construction projects and identifies Portland and Seattle offices.
ADU services described on the company’s website. Experience, current license and availability have not been independently verified.
Source record: 2026-09-08
View listing source ↗Provider websitedesign build
The company presents Seattle attached and detached ADU services and project examples.
ADU services described on the company’s website. Experience, current license and availability have not been independently verified.
Source record: 2026-09-08
View listing source ↗Provider websitearchitect designer
Design and permitting services for Seattle detached ADUs; the company describes feasibility visits and budget coordination.
ADU services described on the company’s website. Experience, current license and availability have not been independently verified.
Source record: 2026-09-08
View listing source ↗Provider website