Quiet Hours: Castro Valley vs San Leandro
How do quiet hours rules compare between Castro Valley, CA and San Leandro, CA?
Castro Valley and San Leandro have similar restriction levels.
Castro Valley, CA
Alameda County
Castro Valley is unincorporated Alameda County, so noise is governed by Alameda County Code Chapter 6.60. Section 6.60.050 prohibits any radio, stereo, audio equipment, musical instrument, or device producing sound that is plainly audible at 50 feet from the source at any hour. Decibel limits in Tables 6.60.040A and 6.60.040B apply to residential and commercial zones.
View full Castro Valley rules →San Leandro, CA
Alameda County
San Leandro quiet hours run 10 PM to 7 AM weekdays and 10 PM to 9 AM weekends under Municipal Code Title 4, Chapter 4-28 (Noise Ordinance).
View full San Leandro rules →Key Facts Comparison
| Fact | Castro Valley | San Leandro |
|---|---|---|
| Jurisdiction | Alameda County (unincorporated) | - |
| Code Reference | Code Ch. 6.60 | - |
| Plainly Audible Rule | 50 feet anytime (Sec. 6.60.050) | - |
| Decibel Tables | 6.60.040A and 6.60.040B | - |
| Weekday quiet hours | - | 10 PM to 7 AM |
| Weekend quiet hours | - | 10 PM to 9 AM |
| Code section | - | SLMC Chapter 4-28 |
| Nighttime limit | - | 45 dBA residential |
| First fine | - | Warning then 100 to 500 |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
What are Castro Valley's quiet hours?
Castro Valley follows Alameda County Code Chapter 6.60. Any radio, stereo, or audio device that is plainly audible 50 feet from the source is prohibited at any time. Tables 6.60.040A/B set decibel limits that are stricter at night (typically 10 p.m.-7 a.m.).
Who enforces noise complaints in Castro Valley?
The Alameda County Sheriff's Office handles after-hours complaints; Alameda County Environmental Health handles ongoing/stationary noise. Call non-emergency dispatch to file a complaint.
San Leandro FAQ
Can I be cited without a sound meter?
Yes. San Leandro uses a plainly audible standard, so an officer can cite noise heard beyond 50 feet or inside another residence.
Do quiet hours differ on weekends?
Yes. Mornings on Saturday and Sunday extend until 9 AM before normal daytime noise is allowed.
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