2 county-level rules, plus city-specific rules for 4 cities in Collin County, Texas.
Verified from official government sources
Collin County has no dark-sky ordinance. Cities regulate lighting through zoning performance standards requiring full cut-off fixtures on commercial sites and maximum 0.5 foot-candles at residential property lines.
Light trespass across property lines in Collin County is addressed through city nuisance codes and zoning illuminance caps of 0.1-0.5 foot-candles at residential boundaries. No statewide light-trespass law exists.
4 cities in Collin County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
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Collin County Ordinance Hub →