San Mateo addresses light trespass through zoning development standards and nuisance provisions. New development must shield exterior lighting. Existing light trespass complaints are handled by Code Enforcement on a case-by-case basis.
Light trespass in San Mateo is managed through the zoning ordinance development standards and the city's general nuisance provisions. New development must install exterior lighting directed downward and shielded to prevent spillover. Existing properties with lighting that creates unreasonable nuisance to neighbors may be addressed through Code Enforcement complaints. The city evaluates complaints considering the type and intensity of lighting, hours of operation, and impact on neighbors. Security lighting and motion-activated lights are permitted but should be aimed to avoid illuminating neighboring bedrooms. The noise ordinance provides a model for nuisance enforcement but there is no specific light-level standard comparable to the decibel limits.
Light trespass is addressed as a nuisance, not a criminal offense. New development with non-compliant lighting may have permits withheld. Code Enforcement can require modifications.
San Mateo, CA
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See how San Mateo's light trespass rules stack up against other locations.
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