Iron County, UT Sign Regulations: Freeway-Facing Signs (2026)

Section 17.52.020(H)(7) sets tighter spacing for billboards along the interstate than along ordinary roads: off-premises advertising signs cannot be erected closer than five hundred feet to any other off-premises sign when the sign is located adjacent to an interstate highway, compared with a three hundred foot minimum spacing on any other road system. This spacing rule sits inside the broader off-premises sign standards in subsection (H): the sign cannot exceed seven hundred square feet, cannot be moving, animated or audible, may only be illuminated indirectly without shining toward highway traffic, and can only go on an already developed commercial or industrial site with a permanent building, per (H)(1), (H)(3), (H)(6) and (H)(9).

Subsection (H)(8) layers on state law, requiring every off-premises sign to meet the Utah Outdoor Advertising Act's requirements, which the county incorporates by reference for signs along the interstate corridor where that state statute applies most directly. Final approval for any off-premises sign, freeway-facing or not, rests with the board of county commissioners under (H)(10), only after the planning commission makes a recommendation. Because Iron County's unincorporated area includes stretches of the I-15 corridor, the five hundred foot interstate spacing standard is the operative rule for any billboard proposed facing that highway rather than the general three hundred foot minimum.