Building Setbacks & Zoning in Iron County, UT (2026)
3 rules for unincorporated Iron County, Utah.
Verified from official government sources
Setback Rules
Iron County's Table of Site Development Standards at Section 17.16.040 sets minimum front, rear and side yard setbacks that fall as lots get smaller and denser, ranging from sixty feet on all sides in the A-20, RA-20 and RR-20 agricultural districts down to as little as ten feet in the R4K district, with accessory buildings held to a flat five-foot minimum.
Yard Setback Minimums by Zone, Iron County, UT
Some RestrictionsIron County Code § 17.16.040
A-20 RA-20 RR-20 R-5 R-2 R-1 R-1/2 (2) R4K C LI I I-A Minimum ... front yard setback (feet) 60 60 60 45 30 30 25 25 25 25 25 200 (1) Minimum rear yard setback (feet) 60 60 60 45 30 30 25 15 10 (12) 25 50 200 (1) ... (4)Accessory Building Setbacks and Separations. Unless determined otherwise by the county commission, accessory building setbacks shall be five feet minimum for rear and side yard s...
Structure Height Limits
In unincorporated Iron County, the Table of Site Development Standards caps primary dwelling height at 30 feet or two stories, one story minimum, in the R-5, R-2, R-1, R-1/2 and R4K residential zones. Commercial (C) and light industrial (LI) parcels may rise to three stories. The A-20, RA-20, RR-20, I and I-A districts carry no numeric height ceiling ("NR"). Iron County Planning and Zoning checks compliance before issuing a building permit.
Iron County Residential Structure Height Limits
Some RestrictionsIron County Code § 17.16.040
ZONING DISTRICTS A-20 RA-20 RR-20 R-5 R-2 R-1 R-1/2 (2) R4K C LI I I-A ... Maximum/minimum building height (feet/stories) NR NR NR 30 ft. or 2 stories/ 1 story 30 ft. or 2 stories/ 1 story 30 ft. or 2 stories/ 1 story 30 ft. or 2 stories/ 1 story 30 ft. or 2 stories/ 1 story 3 stories/ 1 story 3 stories/ 1 story NR NR
Lot Coverage Limits
Iron County Code § 17.16.040 caps how much of a lot can be covered by buildings and other impervious surfaces, ranging from five percent in the R-5 zone up to seventy-five percent in the small-lot R4K zone, fifty percent in the commercial, light industrial and industrial districts, and no fixed cap at all in the rural A-20, RA-20, RR-20 and I-A districts.
Iron County maximum lot coverage limits
Some RestrictionsIron County Code § 17.16.040
Maximum total lot coverage (all buildings) NR NR NR 5% (9) 10% 15% 30% 75% 50% 50% 50% NR ... (9)Five percent (max. site coverage may be >5% for green-houses).
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