Dark Sky Rules: Simi Valley vs Thousand Oaks
How do dark sky rules rules compare between Simi Valley, CA and Thousand Oaks, CA?
Simi Valley and Thousand Oaks have similar restriction levels.
Simi Valley, CA
Ventura County
Simi Valley regulates outdoor lighting to minimize light pollution and glare affecting neighboring properties. The city's Development Code includes standards for shielding, intensity, and direction of exterior lighting on residential and commercial properties.
View full Simi Valley rules →Thousand Oaks, CA
Ventura County
Thousand Oaks regulates outdoor lighting to reduce light pollution, particularly due to its proximity to the Santa Monica Mountains. TOMC Chapter 9 requires shielded fixtures for new development and limits lighting intensity. The Ventura County dark sky ordinance also applies to unincorporated areas nearby.
View full Thousand Oaks rules →Key Facts Comparison
| Fact | Simi Valley | Thousand Oaks |
|---|---|---|
| Shielding | Required on all exterior lighting | - |
| Property Line Limit | 0.5 foot-candles residential | - |
| Direction | Downward, no trespass | - |
| Code Enforcement | (805) 583-6238 | - |
| Fixtures | - | Shielded, directed downward |
| New Development | - | Lighting plans required |
| Parking Lots | - | Full-cutoff fixtures required |
| Sensitivity | - | Near Santa Monica Mountains |
Highlighted rows indicate differences between cities.
Simi Valley FAQ
Are there limits on outdoor lighting in Simi Valley?
Yes, exterior lighting must be shielded and directed downward. Light may not trespass onto neighboring properties above 0.5 foot-candles at the property line.
Can my neighbor's security light shine into my yard?
No, security lights must be shielded and directed to avoid illuminating neighboring properties. File a complaint with Code Enforcement at (805) 583-6238 if lights trespass.
What type of outdoor lights are recommended?
Full cutoff, downward-directed fixtures are recommended. LED and warm-color temperature lights minimize glare and sky glow. Avoid unshielded flood lights and mercury vapor fixtures.
Thousand Oaks FAQ
Does Thousand Oaks have dark sky rules?
Yes, TOMC Chapter 9 requires shielded, downward-directed outdoor lighting for new development. The city's proximity to the Santa Monica Mountains makes light pollution reduction a priority.
Can I install bright security lights?
Security lighting should be motion-activated and directed away from neighboring properties. Continuous bright lighting that causes glare or light trespass may violate city standards.
Do residential lighting rules apply to existing homes?
New construction and major remodels must comply with current lighting standards. Existing homes may be addressed through code enforcement if lighting creates a nuisance for neighbors.
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