El Cajon, CA Outdoor Lighting: Light Trespass & Shielding (2026)

El Cajon regulates light spillover as a nuisance rule rather than a footcandle table. 150 opens by requiring every development other than a detached single-family home to light its parking areas, walkways and common spaces well enough for pedestrian and vehicular safety, then draws the hard line: lighting on one property can never create a nuisance on any other property. That prohibition applies citywide and covers glare and spillover onto neighboring residential yards as much as onto neighboring businesses. To enforce it before construction starts, the section requires an on-site lighting plan for every parking area, pedestrian walkway and common open space or recreation area as a condition of building permit issuance, for every project except a detached single-family home; single-family lots inside a planned unit development or planned residential development lose that exemption and must submit a plan like any multi-family or commercial project.

The Community Development Department reviews these lighting plans alongside the rest of a project's site plan, checking fixture placement against adjacent property lines before signing off on the permit. Because the standard is a nuisance test rather than a numeric footcandle cap, a complaint after occupancy is evaluated case by case: code enforcement can require a fixture be re-aimed, shielded, dimmed or removed if it is found to spill glare onto adjoining land. 14.