Authorizing middle housing in unincorporated growth areas and unincorporated urban growth areas, certain limited areas of more intensive rural development, and fully contained communities.

Senate Bill 5471 authorizes counties to permit "middle housing" in specific unincorporated areas, including designated urban growth areas and certain limited rural development areas. This allows for up to four residential units on parcels typically zoned for single-family homes. Counties implementing this must ensure middle housing development standards are no more restrictive than those for single-family residences, while still allowing objective standards like setbacks to apply. All such housing must be served by appropriate water and sewer services, and county actions to implement these provisions are exempt from certain administrative and judicial appeals.