Light Trespass: Mountain View vs Sunnyvale
How do light trespass rules compare between Mountain View, CA and Sunnyvale, CA?
Mountain View and Sunnyvale have similar restriction levels.
Mountain View, CA
Santa Clara County
Light trespass across property lines in Mountain View is limited to 0.5 foot-candles in residential areas. Persistent light pollution causing nuisance can be reported to Code Enforcement for abatement.
View full Mountain View rules →Sunnyvale, CA
Santa Clara County
Light trespass onto neighboring property in Sunnyvale is a nuisance under SMC Title 9 and Title 19. Offenders can be required to shield or redirect fixtures.
View full Sunnyvale rules →Key Facts Comparison
| Fact | Mountain View | Sunnyvale |
|---|---|---|
| Residential limit | 0.5 foot-candles at 5 ft | - |
| Measurement height | 5 feet above ground | - |
| Color temperature | Under 3000K recommended | - |
| Civil remedy | Civil Code 3479 nuisance | - |
| Enforcement | Code Enforcement investigates | - |
| Legal basis | - | SMC Title 9 + Title 19 |
| Remedies | - | Shield, redirect, reduce wattage |
| Security lighting | - | Must be shielded |
| Motion sensors | - | Recommended |
| Civil option | - | Nuisance suit available |
Highlighted rows indicate differences between cities.
Mountain View FAQ
How do I measure light trespass?
Use a light meter at 5 feet above ground along the property line. Readings over 0.5 foot-candles into a residential lot can be reported to Code Enforcement for investigation.
Can I sue my neighbor over bright lights?
Yes, under Civil Code 3479 excessive light that substantially interferes with your property enjoyment may be a private nuisance, though informal resolution and Code Enforcement are typically faster.
Sunnyvale FAQ
My neighbor's light shines in my bedroom - what can I do?
Request a shield first; if ignored, file a Code Enforcement complaint under nuisance rules.
Are motion lights always allowed?
Yes if properly aimed and shielded; untargeted always-on floodlights are more likely to be cited.
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