Dark Sky Rules: Brentwood vs Oakley
How do dark sky rules rules compare between Brentwood, CA and Oakley, CA?
Brentwood and Oakley have similar restriction levels.
Brentwood, CA
Contra Costa County
Brentwood's zoning and development standards include outdoor lighting requirements aimed at minimizing light pollution and glare into neighboring properties and the night sky. Fixtures on new development must generally be full-cutoff or shielded, and light trespass onto adjacent residential lots is limited.
View full Brentwood 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 | Brentwood | Oakley |
|---|---|---|
| - | - | |
| Fact | - | Full-cutoff shielded fixtures required |
Highlighted rows indicate differences between cities.
Brentwood FAQ
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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