The bill establishes regulations for detached accessory dwelling units (ADUs) outside urban growth areas in Washington State. It allows counties to permit these units under specific conditions, including limitations on the number of units per parcel, compliance with water supply and sewage system requirements, and restrictions on the size of the units, which cannot exceed 1,296 square feet. Additionally, the bill mandates that the detached ADUs must share a driveway with the principal unit and be located within a certain distance from it. If the ADU is used as a short-term rental, the primary unit must be owner-occupied. Counties are also required to track and report the number of ADU permits issued and update their comprehensive land use plans accordingly.

The bill amends existing definitions in RCW 36.70A.696 to include the new regulations for detached ADUs. It clarifies terms such as "accessory dwelling unit," "attached accessory dwelling unit," and "detached accessory dwelling unit," ensuring consistency in the application of the law. The legislation emphasizes that these new provisions do not affect any existing county ordinances regarding accessory dwelling units and allows for other methods of authorizing such units, provided they align with the new regulations.

Statutes affected:
Original Bill: 36.70A.696