ADU rules in Salem, OR — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Salem permits ADUs per Oregon state law and UDC regulations. Detached ADUs up to 800 sq ft and attached ADUs up to 50% of primary dwelling or 800 sq ft are allowed. Detached ADUs may be up to 20 feet tall.
Oregon law (ORS 197.312) requires cities to allow ADUs in residential zones. Salem's UDC implements these requirements. Detached ADUs may be up to 800 square feet. Attached ADUs may be up to 50% of the primary dwelling's living area or 800 sq ft, whichever is less. Detached ADUs are generally limited to 20 feet in height, though specific limits vary by zone. Building permits are required. Oregon's statewide ADU rules prohibit cities from requiring owner-occupancy, additional parking (in many cases), or design review that adds unreasonable cost.
Unpermitted ADUs face code enforcement action. Units not meeting building code may be ordered vacated.
Salem, OR
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Salem, OR
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Salem, OR
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Salem, OR
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Salem, OR
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Salem, OR
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See how Salem's adu rules rules stack up against other locations.
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