Quiet Hours: Altadena vs Santa Clarita
How do quiet hours rules compare between Altadena, CA and Santa Clarita, CA?
Altadena and Santa Clarita 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 →Santa Clarita, CA
Los Angeles County
Santa Clarita prohibits loud, unnecessary, and unusual noise that disturbs the peace under SCMC Chapter 11.44. The noise ordinance sets decibel-based limits by zone. Residential areas have a 65 dBA daytime limit and 55 dBA nighttime limit measured at the property line.
View full Santa Clarita rules →Key Facts Comparison
| Fact | Altadena | Santa Clarita |
|---|---|---|
| Code Section | LA County Code Ch. 12.08 (Title 12) | SCMC 11.44 |
| 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 | - |
| Daytime Limit | - | 65 dBA residential zones |
| Nighttime Limit | - | 55 dBA residential zones |
| Enforcement | - | LA County Sheriff's Dept |
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.
Santa Clarita FAQ
What are the noise limits in Santa Clarita?
Residential areas have a 65 dBA daytime and 55 dBA nighttime limit at the property line under SCMC Chapter 11.44.
How do I report a noise complaint?
Contact the LA County Sheriff's Department Santa Clarita Valley Station for noise complaints.
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