Alameda County zoning requires outdoor lighting to be shielded and directed downward to minimize glare onto neighboring properties. Light trespass is treated as a Ch. 6.65 nuisance.
Title 17 requires all exterior lighting in residential districts to be directed away from neighboring properties and the public right-of-way. Floodlights and security lights cannot be aimed across property lines. The Castro Valley General Plan promotes dark-sky friendly design. CEC Title 24 Part 6 limits outdoor lighting wattage and requires automatic controls (motion sensors or photocell + timer) on new construction. Light trespass causing 'unreasonable disturbance' to neighbors is enforced under §6.65.
Light trespass: warning then $100-$500 citation under §6.65. Title 24 violations: building permit non-compliance and stop-work.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Castro Valley, CA
Alameda County Code §6.60.050 prohibits repairing, rebuilding, modifying or testing vehicles in residential areas between 7 p.m. and 7 a.m. if it produces so...
Castro Valley, CA
Alameda County Code §6.60.050 limits use of electric or gas leaf blowers, sweepers, vacuums, mowers, trimmers, edgers and hedgers in residential areas to 7 a...
Castro Valley, CA
Alameda County Code §5.08.060 makes it unlawful for any person owning, keeping, or having custody of a dog or other animal to knowingly permit or suffer that...
Castro Valley, CA
Alameda County Code §6.60.080 exempts construction activity from Chapter 6.60 only if it occurs between 7 a.m.-7 p.m. on weekdays and 8 a.m.-5 p.m. on Saturd...
Castro Valley, CA
Castro Valley is unincorporated and operates under Alameda County Code Chapter 6.60 (Noise). §6.60.050 makes it a violation to operate any sound-producing de...
Castro Valley, CA
Heavy commercial vehicles - generally over 10,000 lbs GVW or 22 feet long - cannot be parked overnight on Castro Valley residential streets, and cannot be pa...
See how Castro Valley's light pollution & sky glow rules stack up against other locations.
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