Quick answer · Kirkland ADU laws, 2026
In Kirkland, King County, you can now build two ADUs on any single-family lot under Washington's HB 1337 (2023) — with no owner-occupancy requirement, no off-street parking mandate on smaller lots, and DADUs allowed up to 1,000 sq ft.
Kirkland is fully aligned with HB 1337: two ADUs per lot, no owner-occupancy, and a pre-approved DADU plan program that shortens review to about 6–8 weeks. Parking cannot be required within a half mile of major transit — which covers much of downtown and Totem Lake.
Kirkland's walkable neighborhoods and proximity to tech employers make ADUs a smart investment. The city supports ADU construction with clear zoning guidelines and responsive permit processing.
Permit Office
Kirkland Planning
Puget Sound ADU Rent (market range)
$1,600–$2,800/mo
NW ADU Builders — serving Kirkland, WA
NW ADU Builders