2 county-level rules, plus city-specific rules for 9 cities in Contra Costa County, California.
Verified from official government sources
Unincorporated Contra Costa County regulates outdoor lighting through Ordinance Code Title 8 zoning provisions and CEQA review, with stricter standards near Mt. Diablo and in rural residential areas. No comprehensive county-wide dark-sky ordinance, but shielded fixtures are commonly required.
Light trespass and glare onto adjacent properties in unincorporated Contra Costa County is prohibited under Ordinance Code Title 8 nuisance and zoning provisions. Commercial and multi-family projects must meet foot-candle limits at property lines through CEQA lighting review.
9 cities in Contra Costa County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
2 verified rules • Dark Sky Rules, Light Trespass
1 verified rule • Light Trespass
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