Quiet Hours: Altadena vs Pasadena
How do quiet hours rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena 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 →Pasadena, CA
Los Angeles County
Pasadena enforces noise regulations under Chapter 9.36 of the Municipal Code, restricting excessive noise from 10 PM to 7 AM in residential zones. Maximum residential noise levels are 50 dBA during nighttime and 60 dBA during daytime.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Code Section | LA County Code Ch. 12.08 (Title 12) | PMC Ch. 9.36 |
| 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 | - |
| Quiet Hours | - | 10 PM–7 AM |
| Night Limit (Residential) | - | 50 dBA |
| Day Limit (Residential) | - | 60 dBA |
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.
Pasadena FAQ
What are the quiet hours in Pasadena?
Quiet hours are from 10 PM to 7 AM. Residential noise must not exceed 50 dBA at the property line during these hours.
How do I file a noise complaint?
Contact the Pasadena Police non-emergency line or the Code Compliance Division to report noise violations.
Compare other topics
See how Altadena and Pasadena compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool