Iron County, UT Accessory Structures: ADU Owner Occupancy (2026)
Key Facts
- Owner-occupancy required
- one of two units
- Acknowledgment
- signed and recorded
- Runs with title
- binds future owners
- Governing section
- § 17.36.400(B)(1)(b)
- Enforcement path
- Ch. 17.72 notice, 30 days
Summary
Unincorporated Iron County requires the legal owner of record to live in one of the two dwellings whenever a property has an accessory dwelling unit. Section 17.36.400(B)(1)(b) makes owner-occupancy a residency requirement, not a suggestion: the owner must sign and record an acknowledgment committing to live in either the primary home or the ADU as a primary residence.
b.Meet the residency requirement that the legal owner of record occupy one of the two dwellings of the residential structure in which the ADU is located; and sign and record an acknowledgment stating that the owner of record understands the requirement and will establish one of the two dwelling units associated with the ADU as their primary dwelling;
Full Breakdown
Iron County treats owner-occupancy as a core condition of ADU approval alongside utility, parking and size standards. Section 17.36.400(B)(1)(b) requires the property's legal owner of record to occupy one of the two dwelling units in the residential structure where the ADU sits, and the owner must sign and record an acknowledgment stating they understand the requirement and will establish one of the two units as their primary dwelling. Recording the acknowledgment ties the obligation to the property so it runs with title, not just with the person who applied.
This distinguishes an ADU from other accessory living arrangements the county regulates separately, such as a guest house under Section 17.36.270, which carries no comparable residency test. The requirement works together with the rest of Section 17.36.400(B): the ADU must share utility connections with the primary dwelling, provide its own off-street parking, and stay within the size caps for either an addition or a footprint conversion. If a property sells, the new owner inherits the recorded acknowledgment and must also occupy one of the two units to keep the ADU legal; renting out both units to non-owners is not compliant with subsection (b) even if every other physical standard is met.
The zoning administrator reviews compliance as part of any ADU application and can revisit occupancy status if a complaint or inspection under Chapter 1.12's right-of-entry provisions raises a question.
Violations & Fines
Failing to maintain owner-occupancy after recording the required acknowledgment is a zoning violation under Chapter 17.72: the zoning administrator serves written notice giving thirty days to correct the noncompliance under Section 17.72.050 before pursuing further remedies. An uncorrected violation is punishable under the general penalty in Section 1.08.010 as a misdemeanor, up to a one thousand dollar fine or a year in jail, with each day treated as a separate offense.
Frequently Asked Questions
Does the owner have to live in the ADU itself?
Do I need to record anything with the county for my ADU?
What happens to the occupancy requirement if I sell the house?
Sources & Official References
Other rules in Iron County
Compare Iron County to another location·View the Utah accessory structures overview
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