Housing

HB 1345 restricts detached accessory dwelling units (ADUs) - separate small homes on the same lot as a main house - outside urban growth areas in Washington counties. It requires counties to limit each parcel to one ADU, set size limits (max 1,296 sq ft), mandate water metering and sewage capacity documentation, and require ADUs to be within 150 feet of the main home. Counties must enforce penalties for unpermitted ADUs (including $1,000 fines, removal orders, and 3-year permit bans) and track ADU permits for land-use planning updates. The bill applies only to counties allowing such ADUs outside urban areas, not affecting existing urban or rural ADU rules.

HB 2442 allows Washington counties and cities to impose specific real estate excise taxes to fund local capital projects and affordable housing. It authorizes a 0.25% tax on real property sales for general capital projects (like streets, parks, and sewer systems), with strict usage rules requiring projects to align with comprehensive plans. Additionally, it creates a separate 0.5% tax exclusively for affordable housing development, including acquisition, construction, and maintenance for low- and moderate-income residents. Local governments must document funding plans for future projects and follow voter approval processes for new taxes, while funds must be managed through competitive grant processes for housing initiatives. The bill directly affects local governments by expanding their tax tools for infrastructure and housing priorities.

SB 5587 mandates that the Washington center for real estate research produce biennial reports, starting in 2026, analyzing existing housing units and needs across various income levels in each county. These reports will track each county's progress in addressing housing gaps and meeting emergency housing needs. The bill also amends the Public Works Board's criteria for financial assistance. It requires the board to prioritize public works projects that promote infill development or increase affordable housing in counties identified in these reports as having a gap between existing housing and housing needs.

House Bill 1494 modifies existing property tax exemptions for new and rehabilitated multiple-unit dwellings in urban centers. The bill clarifies definitions related to "affordable housing" and the population requirements for cities to qualify for these exemptions. A key provision expands the definition of "rehabilitation improvements" to include modifications to occupied buildings that increase the number of multi-family housing units. These changes do not extend the duration of the exemptions or expand them to include conversions of market-rate buildings to affordable housing. The bill primarily affects property owners, developers, and residents involved with multi-unit housing projects in designated urban areas.