Quick answer · Lynnwood ADU laws, 2026
In Lynnwood, Snohomish 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.
Lynnwood applies HB 1337: two ADUs per lot, no owner-occupancy, and no parking required within a half mile of the Lynnwood Link light rail station — which covers most of the city core.
Lynnwood's new light rail terminus and dense job base drive fast-growing ADU demand. City zoning updates have expanded ADU eligibility across residential neighborhoods.
Permit Office
Lynnwood CDD
Puget Sound ADU Rent (market range)
$1,600–$2,800/mo
NW ADU Builders — serving Lynnwood, WA
NW ADU Builders