Skip to main content
CityRuleLookup

Placer County, CA Public Conduct: Loud Party Ordinance (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Enforcement authority
Sheriff and District Attorney
Gathering defined as
3 or more people at a social occasion
Liability standard
Joint and several among social hosts
Appeal window
15 days, with penalty deposited in advance
Response cost payment due
30 days from notice
Exempt
ABC-licensed premises; supervised family gatherings

Summary

Placer County's Social Host Liability Ordinance makes it unlawful for anyone controlling a property, or responsible for a gathering, to knowingly allow a minor to possess or consume alcohol, marijuana or another controlled substance there. Every social host at the party is jointly and severally liable for law enforcement's response costs.

City-specific rules exist: Roseville has its own loud party ordinance rules that differ from Placer County's county-level regulations. If you live in Roseville, check the city-specific page instead.

Except as permitted by law, it is unlawful for any person having ownership or control of any premises, or who is responsible for a gathering or unruly gathering, to host, knowingly permit, or allow, tacitly or otherwise, a gathering to take place at said premises, where at least one minor possesses or consumes an alcoholic beverage, marijuana, or other controlled substance. ... When law enforcement or other emergency response providers respond to a gathering at which a minor has consumed or is consuming alcoholic beverages, marijuana, or a controlled substance, all social hosts shall be jointly and severally liable.

Full Breakdown

030(A)). 030(C)). 030(F)-(G)). 050). 060). 4 as an alternative to prosecuting the violation as an infraction or misdemeanor.

Violations & Fines

A violation is, at the district attorney's discretion, an infraction or misdemeanor under Government Code § 25132, or the sheriff can instead levy an administrative monetary penalty under § 9.10.100, served by personal service or certified mail, with a 15-day window to file a written appeal along with an advance deposit of the penalty. Responsible persons are also jointly and severally liable for the county's response costs, billed by mail and due within 30 days, with payment stayed pending a timely appeal (§ 9.10.090).

Frequently Asked Questions

Can I be liable if I didn't know minors were drinking at my party?
Possibly. Section 9.10.030(C) treats a failure to take reasonable steps to prevent minors from possessing or consuming alcohol as constructive knowledge, and being present while it happens is prima facie evidence of knowledge under § 9.10.030(B).
Does calling the police on my own party protect me from liability?
Yes. Section 9.10.030(D) says a social host is not in violation if they seek immediate law enforcement assistance to remove a noncompliant guest or end the gathering, or seek medical help for an overdose, despite having taken reasonable preventive steps.
Who pays if deputies respond to a Placer County house party with underage drinking?
The responsible person or persons at the gathering are jointly and severally liable for the county's response costs under § 9.10.090, billed by mail and due within 30 days, unless they file a timely appeal that stays payment.

Sources & Official References

Other rules in Placer County

All Placer County rules

California rules heatmap·Compare Placer County to another location·View the California public conduct overview

Get notified when Loud Party Ordinance in Placer County, CA changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.

Loud Party Ordinance in Cities Across Placer County