Amplified Music & Events: Altadena vs Norwalk
How do amplified music & events rules compare between Altadena, CA and Norwalk, CA?
Altadena and Norwalk have similar restriction levels.
Altadena, CA
Los Angeles County
Amplified music and sound devices in unincorporated LA County are regulated under Chapter 12.08 (Noise Control). Residential areas: 45 dB nighttime (10 PM-7 AM), 50 dB daytime. Sound amplifying equipment in or within 500 ft of residential zones is restricted for commercial purposes.
View full Altadena rules →Norwalk, CA
Los Angeles County
Norwalk regulates amplified music and outdoor events. Permits required for public amplification. Residential areas have stricter limits.
View full Norwalk rules →Key Facts Comparison
| Fact | Altadena | Norwalk |
|---|---|---|
| Residential Night | 45 dB (10 PM-7 AM) | - |
| Residential Day | 50 dB (7 AM-10 PM) | - |
| Commercial Use | Restricted near residential | - |
| Reference | Title 12, Chapter 12.08 | - |
| Permit | - | Required for public amplification |
| Residential | - | General noise limits apply |
| Events | - | Special event permit needed |
| Topic | - | Amplified Music |
Highlighted rows indicate differences between cities.
Altadena FAQ
What are the noise hours for amplified music in LA County?
Amplified sound must not be audible beyond the property line between 10 PM and 7 AM weekdays, or 10 PM and 8 AM weekends. Daytime amplified sound cannot exceed 5 dB above ambient noise at the property line.
Do I need a permit for a party with amplified music?
Not for an occasional private party that stays within noise limits. Large events or recurring parties may require a Temporary Use Permit from the Department of Regional Planning at (213) 974-6411.
How do I file a noise complaint about amplified music?
Call the LA County Sheriff's non-emergency line at (323) 267-4800 for immediate noise disturbances. For ongoing issues, file a code enforcement complaint at (888) 756-2700.
Norwalk FAQ
Do I need a permit for a backyard party?
Private gatherings don’t need permits but must comply with noise ordinance limits, especially during quiet hours.
What about live music at a business?
Commercial venues need appropriate use permits with noise conditions.
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