Dark Sky Rules: Concord vs Oakley
How do dark sky rules rules compare between Concord, CA and Oakley, CA?
Concord and Oakley have similar restriction levels.
Concord, CA
Contra Costa County
Concord does not have a formal dark-sky ordinance but CMC Title 18 requires exterior lighting to be shielded, downcast, and not spill onto neighboring properties. New development must submit a photometric plan demonstrating zero foot-candle spillover at property lines.
View full Concord rules →Oakley, CA
Contra Costa County
Oakley regulates outdoor lighting to prevent glare, light trespass, and sky glow. Exterior light fixtures generally must be fully shielded (full-cutoff), and light should not spill onto adjacent properties beyond specified foot-candle limits at property lines. New development lighting plans are reviewed through the design review process.
View full Oakley rules →Key Facts Comparison
| Fact | Concord | Oakley |
|---|---|---|
| - | - | |
| Fact | - | Full-cutoff shielded fixtures required |
Highlighted rows indicate differences between cities.
Concord FAQ
Can I install floodlights on my Concord home?
Yes, but they must be aimed downward, shielded, and not cast light onto neighboring properties. Motion-activation is encouraged to minimize dusk-to-dawn operation.
Does Concord regulate LED color temperature?
For new commercial and multifamily projects near residential areas, lighting should not exceed 3000K. Residential light choices are not strictly regulated but shielding rules apply.
What about stadium lights at schools?
Sports and field lighting must comply with curfew requirements (off within 1 hour of event end) and include shielding to minimize spillover to neighboring residential uses.
Oakley FAQ
Can I have a bright floodlight in my backyard?
It must be shielded so the bulb is not visible from neighbor's yards and not spill significant light onto adjacent properties. Motion-activated security lights are favored over constant-on.
Are holiday lights allowed?
Yes. Seasonal decorative lighting is generally exempt between specified dates (typically Nov 1 – Jan 15) from intensity and cutoff requirements.
What about solar garden lights?
Low-intensity solar path lighting is generally exempt from the shielding requirements because of their low lumen output.
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