Sunnyvale, CA Public Conduct: Loud Party Ordinance (2026)

50, the Juvenile Alcohol Parties ordinance, targets unsupervised drinking gatherings that the city council found generate vandalism, noise complaints, aggressive behavior and dangerous driving. 020 bars anyone under 21 from possessing or consuming alcohol anywhere not open to the public unless supervised by a parent or legal guardian. 030 goes further and makes it unlawful for any person to suffer, permit, allow or host a social gathering at their residence where ten or more people under 21 are present with alcohol in their possession or being consumed, regardless of whether the host is the minor or an adult who owns or controls the property.

050 makes the responsible person or persons liable for the full public safety services fee: the personnel, vehicles and equipment used, including overtime, calculated without regard to whether extraordinary costs were incurred. The director of public safety must notify the finance director in writing of the names, addresses, date, time and resources used, and that fee becomes a debt owed to the city. If the person found liable is under 21, the statute shifts payment responsibility to their parent or guardian. 040, punishable as set forth in the code's general penalty chapter. The ordinance was adopted in 1990 by Ordinance 2327-90 and remains unchanged in the current code.