Oregon Comprehensive Land Use Planning Statutes
Revised Statutes §§197 and 197A, Amended 2017
By: State of Oregon
Accessory Dwelling Units
Oregon requires most localities to permit one interior, attached, or detached accessory dwelling unit (ADU) by right for reach existing or newly constructed single-family detached dwelling (§197.312(5)). This requirement applies to all counties with populations greater than 15,000 and all cities with populations greater than 2,500 within an urban growth boundary. Localities may impose "reasonable regulations" governing siting and design.