Quiet Hours: Altadena vs Palmdale
How do quiet hours rules compare between Altadena, CA and Palmdale, CA?
Altadena and Palmdale have similar restriction levels.
Altadena, CA
Los Angeles County
Altadena is unincorporated, so LA County Title 12 Chapter 12.08 (Noise Control) applies. Nighttime exterior limits run 10:00 p.m. to 7:00 a.m. with stricter dB caps; daytime runs 7:00 a.m. to 10:00 p.m.
View full Altadena rules →Palmdale, CA
Los Angeles County
Palmdale Chapter 9.18 prohibits any willfully made loud, unnecessary, or unusual noise that unreasonably disturbs the peace and quiet of any neighborhood. Standard is qualitative; no fixed dBA limits.
View full Palmdale rules →Key Facts Comparison
| Fact | Altadena | Palmdale |
|---|---|---|
| Code Section | LA County Code Ch. 12.08 (Title 12) | - |
| Nighttime Window | 10:00 p.m. – 7:00 a.m. | - |
| Residential Night Limit | 45 dBA (R-1) | - |
| Residential Day Limit | 50 dBA (R-1) | - |
| Ambient Exceedance Rule | +5 dB over ambient | - |
| Code | - | Chapter 9.18 |
| Standard | - | Qualitative — disturbing |
| Enforcement | - | Complaint-based |
| Topic | - | Quiet Hours |
Highlighted rows indicate differences between cities.
Altadena FAQ
What are Altadena's quiet hours?
10 p.m. to 7 a.m. under LA County Code Ch. 12.08 — Altadena is unincorporated so LA County's noise ordinance applies.
How loud can my backyard be at night?
Single-family residential exterior noise is capped at 45 dBA from 10 p.m. to 7 a.m. per Section 12.08.390.
Palmdale FAQ
What does Palmdale's noise ordinance prohibit?
Chapter 9.18 makes it unlawful to willfully make or cause any loud, unnecessary, or unusual noise that unreasonably disturbs the peace and quiet of a neighborhood.
Are there specific decibel limits in residential zones?
Chapter 9.18 uses a qualitative 'unreasonable' standard rather than fixed decibel thresholds for general noise. Officers assess the noise in context, time, and location.
Compare other topics
See how Altadena and Palmdale compare on other ordinance categories.
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