Hacienda Heights is an unincorporated community subject to Los Angeles County’s Short‑Term Rental ordinance and business licensing requirements. The county ordinance treats short‑term rentals as an accessory use only at a host’s registered primary residence; hosts must obtain an annual STR registration under Title 7 and display the registration number in all listingshttps://planning.lacounty.gov/long-range-planning/short-term-rentals-ordinance/#:~:text=The%20Short,zones%20that%20permit%20residential%20uses. Home‑sharing (host present) is allowed year‑round, but unhosted rentals are limited to 90 days per yearhttps://planning.lacounty.gov/long-range-planning/short-term-rentals-ordinance/#:~:text=The%20Short,zones%20that%20permit%20residential%20uses. Registrations require proof of primary residence, a local responsible party, a floor plan and evidence of compliance with homeowner association ruleshttps://planning.lacounty.gov/long-range-planning/short-term-rentals-ordinance/#:~:text=The%20Short,zones%20that%20permit%20residential%20uses. Short‑term rental operators must also collect and remit the county’s 12 % transient occupancy tax; the tax applies to stays of less than 30 days, operators must register with the tax collector within 30 days of starting a rental business and remit the tax monthlyhttps://ttc.lacounty.gov/tot/#:~:text=TRANSIENT%20OCCUPANCY%20TAX%20. Source: https://planning.lacounty.gov/str