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

Summary

The law lets counties that plan under RCW 36.70A permit one detached accessory dwelling unit (ADU) per parcel outside urban growth areas, but caps its size, water use, and placement. It adds enforcement penalties, reporting requirements, and limits on how many such units can count toward county population targets. The goal is to expand housing options while protecting resources and maintaining rural density goals.

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