Outdoor Lighting in Berkeley, CA: What Residents Actually Need to Know

If you live in Berkeley or are thinking about moving there, outdoor lighting are one of those things you probably won't think about until they affect you directly. Berkeley has 2 specific rules on the books covering different aspects of outdoor lighting, and some of them might surprise you.

Dark Sky Rules

Berkeley requires all exterior lighting in Residential Districts to be shielded and aimed downward and away from lot lines so glare does not spill onto neighboring property. Motion-sensor fixtures cannot be triggered by activity happening off the lot where the light sits.

Key details: Governing section: BMC § 23.304.100(E). Applies to: All Residential Districts. Core duty: Shield light, aim downward and away from lot lines. Motion sensors: Cannot trigger off off-site movement. Last amended: Ord. 8007-NS § 13, 2026.

Zoning enforcement runs through the Planning and Development Department's code enforcement unit, which handles exterior-lighting glare the same way it handles other Residential District site-feature violations under Title 23, typically opening on a neighbor complaint. A property found out of compliance is directed to re-aim, shield, or replace the offending fixture; unresolved zoning violations can be referred for citation under the city's general municipal code enforcement and penalty provisions, which allow infraction or misdemeanor citations and daily accruing fines for a continuing violation.

Light Trespass & Shielding

Berkeley requires all exterior lighting on residential lots to be shielded and pointed downward and away from lot lines, and it bars motion-sensor lights from being triggered by activity happening off the property they sit on.

Key details: Governing section: BMC 23.304.100.E. Shielding requirement: downward, away from lot lines. Motion sensor limit: cannot trigger from off-property activity. Applies to: all Residential Districts. Enforcement: zoning code enforcement.

Unshielded exterior lighting that casts glare onto an adjacent lot line, or a motion-sensor light that activates from movement occurring off the installed property, violates BMC 23.304.100.E and is enforceable through the City's zoning code enforcement process, which can require the fixture be re-aimed, shielded, or removed.

The Bottom Line

Berkeley's outdoor lighting rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Berkeley is broadly strict or permissive.

These rules come from Berkeley's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.