summary
Introduced
01/12/2026
01/12/2026
In Committee
02/20/2026
02/20/2026
Crossed Over
02/10/2026
02/10/2026
Passed
03/03/2026
03/03/2026
Dead
Introduced Session
2025-2026 Regular Session
Bill Summary
AN ACT Relating to middle housing in unincorporated areas; and 2 amending RCW 36.70A.536. 3
AI Summary
This bill amends existing law to allow counties to permit "middle housing," which refers to housing types like duplexes, triplexes, quadplexes, and townhomes, in unincorporated areas. Specifically, it permits middle housing on parcels that currently allow single-family homes in designated areas of more intensive rural development and in urban growth areas. The bill clarifies that such developments can have up to four residential units per lot. It also mandates that the standards for middle housing should not be more restrictive than those for single-family homes, though objective development regulations like setbacks and lot coverage can still apply. Furthermore, the bill specifies that middle housing in rural counties must be served by a publicly owned sewer system or a large on-site sewage system, while in nonrural counties, it must be served by a publicly owned sanitary sewer system, and in urban growth areas, it must have access to water and sewer services. The bill also defines "rural county" and "large on-site sewage system" for clarity.
Committee Categories
Housing and Urban Affairs
Sponsors (6)
Adam Bernbaum (D)*,
Andrew Engell (R),
Mia Gregerson (D),
Mari Leavitt (D),
Strom Peterson (D),
Julia Reed (D),
Last Action
Delivered to Governor. (on 03/03/2026)
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