Quick answer · Redmond ADU laws, 2026
In Redmond, 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.
Redmond honors HB 1337's two-ADU-per-lot right with no owner-occupancy strings. Because most of Redmond sits within a half mile of the new East Link light rail stations, off-street parking cannot be required for ADUs across much of the city.
Redmond's tech campus proximity creates strong ADU rental demand. The city has been proactive in updating zoning to accommodate ADU construction across residential neighborhoods.
Permit Office
Redmond Planning
Puget Sound ADU Rent (market range)
$1,600–$2,800/mo
NW ADU Builders — serving Redmond, WA
NW ADU Builders