Land Use & Zoning
What is an 'accessory dwelling unit' (ADU) and what does Oregon state law require cities to do regarding ADUs?
AADUs are prohibited in Oregon single-family zones
BOregon law requires cities to allow ADUs in areas zoned for single-family development to increase housing supply✓ Correct
CADUs are only allowed in commercial zones
DOregon prohibits ADU rentals to non-family members
Explanation
An ADU is a secondary living unit on a property with a primary dwelling (attached, detached, or garage conversion). Oregon state law (ORS 197.312) requires cities and counties to allow ADUs in single-family residential zones as a strategy to increase housing supply and density without rezoning. Many cities have adopted ADU-friendly regulations following this mandate.
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