Primary-Residence-Only Rule
Flagstaff does not require every short-term rental host to live on site, but it does when the property holds an accessory dwelling unit built under a newer certificate of occupancy. Under City Code § 3-12-001-0007(B), the owner must occupy the property as a primary residence whenever it contains an ADU that received its certificate of occupancy from the City on or after September 14, 2024, and renting that ADU as an STR without living there is a prohibited use.
Flagstaff STR Owner Residency for ADUs
Some RestrictionsFlagstaff City Code § 3-12-001-0007(B)
B. Effect of Accessory Dwelling Unit. The owner of an STR shall reside on the property as the owner’s primary residence if the property contains an accessory dwelling unit and if a certificate of occupancy was issued for the accessory dwelling unit by the City on or after September 14, 2024.