San Diego recently passed STR regulations with the goal of limiting STRs to 1% of the total housing stock. Similar to Boston, San Diego recognizes multiple classes of STRs based on characteristics of the home and rental practices. San Diego’s tiers are partly based on the number of days rented, with fewer restrictions on owner-occupants who rent their home for less than 20 days, intermediate restrictions for owner-occupants who rent their home for more than 20 days but still live there most of the time, and significant restrictions on full-time STRs. STR operators must apply for a license, and a limited number of licenses are granted on a lottery basis. City of San Diego, “Short-Term Residential Occupancy (STRO),”