Iron County, UT Outdoor Lighting: Light Trespass & Shielding (2026)

The requirement sits in the footnotes to Section 17.16.040's Table of Site Development Standards, which the Iron County zoning ordinance applies to every use, building and structure through Section 17.36.020's mandate that all development comply with the table's standards. Footnote (8) attaches specifically to the Commercial (C) column of the table's 'Outside and security lighting' row, meaning the downward-and-away rule is triggered when a commercial use in unincorporated Iron County sits near agricultural (A-20, RA-20, RR-20) or residential (R-5, R-2, R-1, R-1/2, R4K) zoned land.

The same table's footnote (7) requires any accessory outside storage adjacent to those districts to be screened by a six-foot solid fence or wall, so lighting and storage screening are reviewed together. Compliance is checked by Iron County Planning and Zoning during site plan review that accompanies a building permit, conditional use permit, or administrative land use permit application under Chapters 17.28 and 17.32; the zoning administrator can withhold or revoke a permit under Section 17.72.130 if the lighting plan does not conform. Unlike a countywide dark-sky ordinance, the rule is narrow: it does not regulate residential porch lights or general light pollution outside the commercial-adjacent-to-ag/residential scenario the table describes.