Establishing limitations on detached accessory dwelling units outside urban growth areas.

SB 5413 sets new limits for detached accessory dwelling units (secondary housing units on the same property as a main home) outside urban growth areas in Washington County. It requires counties to enforce specific rules, including a 1,296-square-foot size limit for units, documentation of water/sewer capacity, placement within 150 feet of the main home, and restrictions on short-term rentals (requiring owner occupancy). Counties must also track permits annually, update land use plans to account for these units, and implement enforcement measures like double permit fees for unpermitted units or $1,000+ fines. The bill applies to rural properties outside designated urban boundaries and does not affect existing county ordinances or urban-area rules.