2 county-level rules, plus city-specific rules for 6 cities in Alameda County, California.
Verified from official government sources
East Alameda County supports dark sky preservation near Lick Observatory. Title 17 requires shielded full-cutoff fixtures in rural and hillside zones, stricter near the observatory influence area.
Alameda County treats light trespass onto neighbors as nuisance under Title 17 and Civil Code 3479. Residential fixtures cannot exceed 0.5 foot-candles at adjacent property lines.
California Civil Code § 3479
Anything which is injurious to health, including, but not limited to, the illegal sale of controlled substances, or is indecent or offensive to the senses, or an obstruction to the free use of property, so as to interfere with the comfortable enjoyment of life or property, or unlawfully obstructs the free passage or use, in the customary manner, of any navigable lake, or river, bay, stream, can...
6 cities in Alameda 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
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