The bill establishes regulations for detached accessory dwelling units (ADUs) outside of urban growth areas in Washington State. It allows counties that choose to plan under the relevant chapter to permit these units, provided they adhere to specific limitations. Key requirements include that no parcel may have more than one ADU, the unit must comply with water supply and sewage system regulations, and its gross floor area cannot exceed 1,296 square feet. Additionally, the bill mandates that counties implement code enforcement measures for unpermitted ADUs, including penalties and a voluntary compliance process, and requires tracking and reporting of ADU permits to inform future land use planning.

The bill also amends existing definitions related to accessory dwelling units in RCW 36.70A.696, incorporating the new section that outlines the regulations for detached ADUs. It clarifies terms such as "detached accessory dwelling unit" and "principal unit," ensuring consistency in the application of the law. The legislation aims to balance the development of ADUs with the need for regulatory oversight and planning, while also allowing for flexibility in housing options outside urban growth areas.

Statutes affected:
Original Bill: 36.70A.696