Outdoor Lighting in Littleton, CO (2026)
2 verified outdoor lighting rules for Littleton, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Dark Sky Rules
Littleton's Unified Land Use Code requires exterior luminaires to be full cutoff fixtures aimed downward, never above the horizontal plane or more than 45 degrees off the mounting surface where visible from a residential lot or public road.
Littleton Requires Full Cutoff, Downward-Directed Lighting
Some RestrictionsLittleton, CO Unified Land Use Code Sec. 10-1-3.11.A; Sec. 10-1-3.11.G(3)
A. Purpose. The purpose of this Section is to regulate light trespass and glare to ensure the safety of motorists and pedestrians, and to ensure lighting does not adversely affect land uses on adjacent lands. ... ... 3. Shielding. All exterior luminaries shall be full cutoff fixtures and directed downward, as displayed by Figure 10-1-3.11.1, Types of Fixtures. In no case shall lighting be direc...
Light Trespass & Shielding
Littleton caps how much light can spill onto a neighbor's land: 0.2 foot-candle at the lot line between single-family residential properties, and 0.1 foot-candle measured 10 feet beyond the property line for attached, multi-family, non-residential, and industrial uses.
Littleton Light Trespass Limits at the Property Line
Some RestrictionsLittleton, CO Unified Land Use Code Sec. 10-1-3.11.G(6)(a)-(b)
6. Light Trespass. Lighting shall be from a concealed light source and with effective provisions made to prevent light trespass onto adjoining properties or roadways. a. Single-Family Detached Residential Uses. Any lamp installed on single-family residential property and visible from any other single-family residential property shall be shielded such that light trespass on the other residential...
Looking for Arapahoe County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Littleton city rules.
Outdoor Lighting in Arapahoe County →