Light Trespass: Castro Valley vs San Leandro
How do light trespass rules compare between Castro Valley, CA and San Leandro, CA?
Castro Valley and San Leandro have similar restriction levels.
Castro Valley, CA
Alameda County
Alameda County treats light trespass onto neighbors as nuisance under Title 17 and Civil Code 3479. Residential fixtures cannot exceed 0.5 foot-candles at adjacent property lines.
View full Castro Valley rules →San Leandro, CA
Alameda County
San Leandro nuisance code allows complaints for light trespass onto neighboring property. Typical remedy is shielding or redirecting fixtures.
View full San Leandro rules →Key Facts Comparison
| Fact | Castro Valley | San Leandro |
|---|---|---|
| Residential limit | 0.5 foot-candles at line | - |
| Commercial limit | 1.0 foot-candle typical | - |
| Nuisance law | Civil Code 3479 | - |
| Required | Shielded, downward-directed | - |
| Motion sensors | 5-10 minute timers OK | - |
| Local remedy | - | Nuisance complaint |
| Statute | - | Civil Code 3479 |
| Typical fix | - | Shield/redirect |
| Threshold | - | ~0.5 fc at line |
| Civil option | - | Small claims |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
My neighbor's security light shines into my bedroom. What can I do?
Ask politely first, then file a code enforcement complaint with Alameda County or your city. Document with photos showing intrusion. Private nuisance suits are also available under Civil Code 3479.
Can I use bright LED security flood lights?
Yes, but they must be shielded to direct light onto your property only and not exceed 0.5 foot-candles at neighbor property lines. Motion-activated fixtures are preferred over always-on lighting.
San Leandro FAQ
My neighbor's light shines in my window - what can I do?
Start with a polite request, then file a code enforcement complaint if unresolved.
Can I sue over a light?
Yes. Private nuisance under CA Civil Code §3479 is actionable in small claims or civil court.
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