Weld County has no formal dark-sky ordinance, but the Agricultural-zone bulk requirements mandate that outdoor light sources be shielded so beams or rays do not shine directly onto adjacent properties, and that light never creates a traffic hazard on public or private roads.
Rather than a standalone dark-sky code, Weld County Code Chapter 23 embeds a light-shielding rule in the Agricultural (A) zone bulk requirements. Section 23-3-70(F) requires that light sources be shielded so beams or rays will not shine directly onto adjacent properties, that neither direct nor reflected light create a traffic hazard for motorists on public or private roads, and that no colored lights be used which could be confused with traffic-control devices. Sign lighting is separately capped so spillover onto adjoining lots stays low. These rules apply to unincorporated land; the cities of Greeley and Evans have their own outdoor-lighting standards. Contact Weld County Planning Services to confirm what applies to your property.
Unshielded lighting that spills directly onto a neighbor's property or creates a road hazard is a zoning violation enforced by Weld County Code Compliance under Chapter 23, typically through an order to shield or redirect the fixture.
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See how Weld County's dark sky rules rules stack up against other locations.
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