WA HB2269

Counties planning under the Growth Management Act may authorize middle housing types (up to 4 residential units per lot) on parcels zoned for single-family residences in limited areas of more intensive rural development and designated urban growth areas

Middle housing standards cannot be more restrictive than those for detached single-family residences, though counties may apply the same objective development regulations (setbacks, lot coverage, stormwater, tree canopy requirements)

Middle housing in rural counties within limited areas of more intensive rural development must be served by a publicly owned sanitary sewer system or a large on-site sewage system

Middle housing in nonrural counties within limited areas of more intensive rural development must be served by a publicly owned sanitary sewer system (changed from previous "existing sewer service" requirement)

Middle housing in designated urban growth areas must be served by both water and sewer services