Portland ADUs can be rented for long-term residential use without owner-occupancy under Oregon HB 2001. Short-Term Rentals (under 30 days) are regulated by Portland City Code Title 33.207, requiring Accessory Short-Term Rental (ASTR) permits. ASTR permits require host occupancy of the primary dwelling for at least 270 days per year, effectively limiting ADU STR use to owner-occupied properties.
Portland's long-term rental market for ADUs is open under Oregon state law (HB 2001) without owner-occupancy requirements. Short-term rentals (under 30 consecutive days) are regulated by Portland City Code Title 33.207 (Accessory Short-Term Rentals). Two ASTR types exist: Type A (up to 2 bedrooms rented, including the primary or ADU) and Type B (3-5 bedrooms, requires Conditional Use review). All ASTR permits require the host to occupy the primary residence on the property at least 270 nights per year (about 9 months). This means an ADU can be used as an STR only if the property owner occupies the main house, or vice versa. ASTR permits require annual renewal ($178 application fee for Type A, higher for Type B), Bureau of Development Services inspection, smoke and carbon monoxide detectors, and a posted permit number. The Portland Transient Lodging Tax (11.5% combined city and county) and Oregon State Lodging Tax (1.5%) apply. Long-term rentals (30+ days) face no occupancy requirement and are protected by Oregon's statewide rent stabilization (SB 608).
Operating an unpermitted ASTR carries fines up to $5,000 per violation under Title 33.207. Booking platforms (Airbnb, VRBO) face penalties for listing unregistered Portland units. Loss of 270-day owner occupancy converts the ASTR to a violation. Tax non-compliance triggers Portland Revenue Division enforcement. Long-term tenant evictions without just cause violate Oregon ORS 90.427.
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See how Portland's adu rental restrictions rules stack up against other locations.
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