Simi Valley, CA Public Conduct: Loud Party Ordinance (2026)
Key Facts
- Weeknight cutoff
- 10:00 p.m. Sunday-Thursday, Sec. 5-33.02
- Weekend cutoff
- 11:00 p.m. Friday-Saturday, Sec. 5-33.02
- Host liability
- Joint and several for police costs, Sec. 5-33.07
- Second response
- Chief of Police must close and disperse party
- Toilets required
- Scaled to headcount once party sells admission
Summary
Simi Valley bans loud parties with bands, radios or amplified sound after 11 p.m. on weekends and 10 p.m. on weeknights under Municipal Code Section 5-33.02, and Section 5-33.06 makes every host, owner, tenant or person collecting a cover charge jointly and severally liable for the police response costs a disruptive party generates.
It shall be unlawful to conduct or allow to be conducted any party which has present a band, orchestra, radio, or any other electronic sound reproduction and/or amplification device/system between the hours of 11:00 p.m. and 7:00 a.m. on Friday or Saturday and between the hours of 10:00 p.m. and 7:00 a.m. on Sunday through Thursday which produces loud and unreasonable sound in volume sufficient to maliciously and willfully disturb the peace, quiet, or repose of persons of ordinary and normal sensitivity in a neighborhood. ... "Host" means any person conducting and/or permitting a party, including: Owner(s) and/or lessee(s) of the property where a party is being given ... When a party occurs at a premises and a police officer at the scene determines that it constitutes a threat to the public peace, health, safety or general welfare, each host shall be held jointly and severally liable for the cost of providing police personnel and services to abate the threat.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 51).
Full Breakdown
m. 03 covers loud parties without music using the same hours. Once a peace officer warns the party that it's disturbing the peace, any continuation is prima facie evidence of malicious and willful intent, removing the need to prove intent separately. 06 defines "host" broadly: owners, lessees, anyone hosting the party, anyone charging admission, anyone serving alcohol, and the parent or guardian of a minor host. 07, once an officer at the scene determines the party threatens public peace, health, safety or welfare, every host is jointly and severally liable for the cost of the police response, and a chapter violation is itself prima facie evidence of that threat.
12 lay out an escalation process: police issue a written first-warning notice that a host must sign, a second police response for the same threat is billed as a special police assignment, and the Chief of Police or a designee must close and disperse the party outright after that second response. 04 separately requires portable or fixed toilets scaled to headcount, for example two toilets for the first fifty female guests, once the party gets big enough to need them.
Violations & Fines
Refusing to sign a police warning notice under Section 5-33.09 or 5-33.10 is a misdemeanor on its own. Beyond that, Section 5-33.07 makes every host jointly and severally liable for the City's cost of the police response once an officer finds the gathering threatens public peace or safety, and Section 5-33.11 adds the cost of any special police assignment triggered by a second response, including damage to City property or injury to City personnel.
Frequently Asked Questions
Who counts as a 'host' liable for a loud party in Simi Valley?
What happens the first time police respond to a loud party?
Can the City actually shut a party down?
Sources & Official References
Other rules in Simi Valley
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