San Marcos regulates outdoor lighting through SMMC Title 20 development standards. New development must use shielded fixtures to minimize light pollution, glare, and light trespass onto adjacent properties.
San Marcos regulates outdoor lighting through SMMC Title 20 (Zoning) development standards. New construction and major renovations must incorporate fully shielded (full-cutoff) exterior lighting fixtures that direct light downward and prevent glare and upward light emission. Light trespass onto adjacent properties must be minimized, with illumination at the property line generally not exceeding 0.5 foot-candles in residential zones. Parking lot lighting for commercial and multi-family projects requires photometric plans demonstrating compliance. Residential security lighting should be shielded and motion-activated where possible. While San Marcos does not have a standalone dark sky ordinance, the city's lighting standards align with dark sky principles. San Diego County's proximity to Palomar Observatory historically influenced regional lighting standards. LED conversions should use warm-color temperatures (3000K or below) where feasible.
Non-compliant lighting on new development subject to plan check rejection. Existing lighting creating nuisance conditions may be addressed through Code Enforcement at (760) 744-1050 x3234.
San Marcos, CA
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San Marcos, CA
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San Marcos, CA
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San Marcos, CA
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San Marcos, CA
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San Marcos, CA
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Side-by-side rule comparisons with other cities in San Diego County.
See how other cities in San Diego County handle dark sky rules.
See how San Marcos's dark sky rules rules stack up against other locations.
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