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Santa Clara County, CA Noise Ordinances: Amplified Music & Events (2026)

Some Restrictions

Amplified music rules in Santa Clara County, CA — also called sound permit, PA system, or live music ordinances — set decibel limits, time-of-day restrictions, and when permits are required.

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Key Facts

Day Limit: 55 dBA at residential property line
Night Limit: 45 dBA (10 PM to 7 AM)
Permit Required: For commercial outdoor amplified events

City-specific rules exist: Santa Clara, Palo Alto, Mountain View, and Sunnyvale have their own amplified music & events rules that differ from Santa Clara County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Summary

Santa Clara County regulates amplified music through its noise ordinance with decibel limits and quiet hours. Outdoor amplified sound generally requires a permit and must meet property-line limits.

Full Breakdown

Amplified music in unincorporated Santa Clara County is regulated under the County Noise Ordinance (Division B11 of the County Code). The ordinance establishes exterior noise limits measured at the property line of the receiving parcel, typically 55 dBA daytime and 45 dBA nighttime in residential zones, with nighttime hours running from 10:00 PM to 7:00 AM. Amplified music that exceeds these limits or that is plainly audible from 50 feet away in residential areas may be cited as a public nuisance. Commercial venues hosting outdoor amplified entertainment need an administrative permit from the Planning Office and may require CEQA review for events exceeding threshold attendance. Wedding venues in the foothills (Los Gatos hills, west of Saratoga) commonly operate under conditional use permits that cap amplified music at 10:00 PM. Sheriff deputies respond to noise complaints and can issue infractions.

Frequently Asked Questions

Do I need a permit for a backyard party with amplified music?

Occasional private gatherings typically do not require a permit, but music must stop by 10:00 PM and stay within decibel limits. Repeated complaints can result in citations.

What if my neighbor plays loud music constantly?

Call the Sheriff non-emergency line. Deputies can measure with a sound meter and issue citations if levels exceed the ordinance.

How does Santa Clara County compare?

See how Santa Clara County's amplified music & events rules stack up against other locations.

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Santa Clara County, CA Noise Ordinances: Amplified Music & Events (2026)

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