Iron County, UT Building Setbacks & Zoning: Setback Rules (2026)

The table lists twelve zoning districts across the top, from the twenty-acre agricultural A-20, RA-20 and RR-20 zones through the small-lot R4K and townhouse zones to Commercial (C), Light Industrial (LI), Industrial (I) and Intensive Agricultural (I-A). The front and rear yard setback rows read sixty feet for A-20, RA-20 and RR-20; forty-five feet for R-5; thirty feet for R-2 and R-1; twenty-five feet for R-1/2, R4K, C, LI and I; and two hundred feet, per footnote (1), for the I-A district, where the two-hundred-foot setback applies only to principal buildings, not the accessory buildings and dwellings that instead use the A-20 setbacks.

Footnote (12) lets the ten-foot Commercial-district rear setback shrink further when the rear lot line abuts a public road or railroad right-of-way. Footnote (4) sets a separate, uniform standard for accessory structures regardless of zone: accessory building setbacks shall be five feet minimum for rear and side yard setbacks, with front setbacks matching the main building and no accessory building allowed closer to the front line than the principal structure, or inside a utility easement. Section 17.36.020(E) makes clear a single required yard cannot be counted toward the setback of more than one building or lot.