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 §6.60.050 makes amplified sound from any radio, stereo, instrument or device a violation at any time of day if plainly audible 50 feet from th...
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
Alameda County NPO §6.65.030 prohibits parking or storing vehicles on lawns or unimproved surfaces of residential property. Vehicles must be on paved concret...
See how Castro Valley's light pollution & sky glow rules stack up against other locations.
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