Antioch, CA Outdoor Lighting: Dark Sky Rules (2026)

Antioch has not adopted an International Dark-Sky Association (IDA) model dark-sky ordinance, unlike Sierra foothill communities that prioritize astronomical viewing. However, Antioch Municipal Code Title 9 (Planning and Zoning) development standards and the General Plan include outdoor lighting performance standards requiring that non-residential and multifamily projects use full-cutoff or fully shielded luminaires, direct light downward, and prevent light trespass and glare onto adjacent residential properties. Commercial parking lot lighting typically must have an average maintained illuminance of 1-2 footcandles with uniformity ratios meeting California Energy Code Title 24 Part 6 requirements. Title 24 Part 6 (Building Energy Efficiency Standards) mandates outdoor lighting controls (motion sensors, auto-off, time clocks) and BUG (Backlight-Uplight-Glare) ratings that inherently push projects toward full-cutoff fixtures. Residential outdoor lighting is largely unregulated by the city except through general nuisance provisions - bright, glaring fixtures aimed at neighbors can trigger complaints under AMC 5-17 (Nuisances) or Civil Code 3479. Sports field and school lighting in Antioch (e.g., Antioch High School, Deer Valley HS) comply with Title 24 and CEQA-required mitigation that may limit operational hours and require shielding. Astronomy enthusiasts note the eastern contra costa sky is moderately light-polluted (Bortle 5-6); darker skies require travel to Mount Diablo or the Delta. Residents bothered by neighbor lighting should first attempt neighbor-to-neighbor resolution, then contact code enforcement at (925) 779-7042.