Light Trespass: Richmond vs San Ramon

Richmond prohibits light glare and spillover that creates a nuisance to neighboring properties, typically limiting illumination at residential property lines to 0.5 foot-candles measured at ground level.

San Ramon Development Code limits light glare and spillover from private lighting onto neighboring properties and public rights-of-way. Typical standards require illumination at property lines not to exceed 0.5–1.0 foot-candles for residential-adjacent properties, with full-cutoff fixtures required to prevent direct view of light sources from off-site. Violations are handled through code enforcement and may also give rise to civil nuisance claims. Security lighting is allowed but must be shielded and ideally motion-activated.