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Residential Building Permit (Single Family Dwelling, New Construction) in Unincorporated Iron County, Utah

Required for new single-family dwelling construction in unincorporated Iron County, regulated by the state-adopted IBC/IRC per Utah Code § 15A-2-103. Building valuation for fee purposes is set at $108.46 per square foot for a Single Family Dwelling ($34.09/sq ft for a semi-finished basement, $23.20/sq ft for an unfinished basement) per the Iron County Fee Schedule adopted May 26, 2026.

Verified 2026-07-03 · Source

When you need this permit

  • New single-family dwelling construction
  • Structural engineered plans required for all dwellings, per the Building & Zoning FAQ
  • Soil/geotechnical testing required for any new dwelling
  • Utah Prairie Dog Clearance form required (per the county's Forms index)
  • Geotechnical Form — Footing Foundation and Geotechnical Form — Backfill Final Grade, both required as distinct submittals per the county's Forms index

Required documents

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Fee schedule

Building Permit Fee — valuation $1 to $500Iron County Fee Schedule, adopted May 26, 2026 (ironcountyut.gov/files/auditor/financials/fee-schedule-2026.pdf), Section 1: Building Department, Building Permit Fees table.
$24
Building Permit Fee — valuation $501 to $2,000Iron County Fee Schedule, adopted May 26, 2026.
$24 for the first $500 + $3 for each additional $100 or fraction thereof, up to and including $2,000
Building Permit Fee — valuation $2,001 to $40,000Iron County Fee Schedule, adopted May 26, 2026.
$69 for the first $2,000 + $11 for each additional $1,000 or fraction thereof, up to and including $40,000
Building Permit Fee — valuation $40,001 to $100,000Iron County Fee Schedule, adopted May 26, 2026.
$487 for the first $40,000 + $9 for each additional $1,000 or fraction thereof, up to and including $100,000
Building Permit Fee — valuation $100,001 to $500,000Iron County Fee Schedule, adopted May 26, 2026 (schedule prints the bracket start as '$100,0001' — a typographical duplication of the leading '1' in the source PDF; reported here as the evident intended value of $100,001 to match the preceding bracket's upper bound of $100,000).
$1,027 for the first $100,000 + $7 for each additional $1,000 or fraction thereof, up to and including $500,000
Building Permit Fee — valuation $500,001 to $1,000,000Iron County Fee Schedule, adopted May 26, 2026.
$3,827 for the first $500,000 + $5 for each additional $1,000 or fraction thereof, up to and including $1,000,000
Building Permit Fee — valuation $1,000,001 to $5,000,000Iron County Fee Schedule, adopted May 26, 2026.
$6,327 for the first $1,000,000 + $3.00 for each additional $1,000 or fraction thereof, up to and including $5,000,000
Building Permit Fee — valuation $5,000,001 and upIron County Fee Schedule, adopted May 26, 2026.
$18,327 for the first $5,000,000 + $1 for each additional $1,000 or fraction thereof
Building Application/Plan Review Submittal Fee (Dwelling)Iron County Fee Schedule, adopted May 26, 2026, Legend note (d).
$250 (non-refundable, applied to the building permit)
Plan Review FeeIron County Fee Schedule, adopted May 26, 2026 — also referenced in Legend note (c): 'Subject to a plan check (P.C.), electrical, plumbing, mechanical fee up to eighty-five percent (85%) of the building fee.'
Up to 85% of the Building Permit Fee
Utah State FeeIron County Fee Schedule, adopted May 26, 2026, consistent with the statewide Uniform Building Code Commission fee required of all Utah compliance agencies.
1% of the Building Permit Fee
Geologic Condition ReviewIron County Fee Schedule, adopted May 26, 2026.
$100
Garbage Can FeeIron County Fee Schedule, adopted May 26, 2026.
$100
Building Permit RenewalIron County Fee Schedule, adopted May 26, 2026 — applies if no required inspections occur within 1 year of permit issuance, per the Building & Zoning FAQ.
Up to $750

Review timeline

Plan review
Not published — contact the department

How long did your Residential Building Permit (Single Family Dwelling, New Construction) permit actually take in Unincorporated Iron County?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Footing/Foundation

    Per Geotechnical Form — Footing Foundation submittal requirement, Iron County Forms index.

  2. 2

    Backfill/Final Grade (Geotechnical)

    Second-stage geotechnical sign-off per Geotechnical Form — Backfill Final Grade, distinct from the footing-stage form, per Iron County Forms index.

  3. 3

    Framing

    Structural framing inspection consistent with adopted IBC/IRC requirements; specific county inspection checklist not separately published online as of 2026-07-04.

  4. 4

    Final

    Final building inspection prior to occupancy.

See the full Unincorporated Iron County inspection guide — scheduling & re-inspection fees →

Tips

  • Iron County requires TWO separate geotechnical form submittals — Footing Foundation and Backfill Final Grade — a two-stage process distinct from Cedar City's single combined Geo-Technical Data Sheet.
  • Building valuation is set per square foot by occupancy type ($108.46/sq ft for a Single Family Dwelling) per the county's own Fee Schedule, rather than a contractor-supplied estimate — Remodel permits are the exception, valued at 'Contractor's Estimate.'
  • No building permit fees are refunded after 180 days, and plan review fees are never refundable, per the Iron County Fee Schedule and Building & Zoning FAQ.
  • A Utah Prairie Dog Clearance form is required — the same regional Endangered Species Act consideration documented for neighboring Cedar City.

Frequently asked questions

Unincorporated Iron County requires a residential building permit (single family dwelling, new construction) for: New single-family dwelling construction; Structural engineered plans required for all dwellings, per the Building & Zoning FAQ; Soil/geotechnical testing required for any new dwelling; Utah Prairie Dog Clearance form required (per the county's Forms index); Geotechnical Form — Footing Foundation and Geotechnical Form — Backfill Final Grade, both required as distinct submittals per the county's Forms index. If your project isn't listed, confirm with Iron County Building Department at (435) 865-5350 before starting work.

Per the Iron County Fee Schedule (adopted May 26, 2026), building valuation for a Single Family Dwelling is set at $108.46 per square foot, with the Building Permit Fee scaled from that valuation on a bracketed table (e.g., $487 for the first $40,000 of valuation, plus $9 per additional $1,000 up to $100,000). A $250 non-refundable Dwelling plan review submittal fee, a Plan Review Fee of up to 85% of the Building Permit Fee, and a 1% Utah State Fee also apply. Contact the Building Department at (435) 865-5350 for a project-specific estimate.

Unincorporated Iron County does not publish a plan-review timeline for this permit. Contact Iron County Building Department at (435) 865-5350 for current turnaround.

You'll need: Building Permit Application; Prairie Dog Clearance; Geotechnical Form — Footing Foundation; Geotechnical Form — Backfill Final Grade. Depending on your project, Unincorporated Iron County may also ask for: Owner Builder Form; Plan Review Waiver; A-20 Acknowledgment. See the required-documents checklist on this page for details on each.

Unincorporated Iron County requires 4 inspection(s) for a residential building permit (single family dwelling, new construction), in order: Footing/Foundation, Backfill/Final Grade (Geotechnical), Framing, Final. Schedule each through Iron County Building Department ((435) 865-5350).

Apply through Iron County Building Department at 82 N 100 E #102, Cedar City, UT 84720. Phone: (435) 865-5350. Office hours: Monday–Friday, 7:30 AM to 4:30 PM, per ironcountyut.gov/building. Building Official: Terry Palmer; Assistant Building Official/Zoning Officer: Nate Dennett.. Official information: https://ironcountyut.gov/building.

Unincorporated Iron County, Utah has adopted: 2024 International Building Code (IBC), including Appendices C & J — Utah Code § 15A-2-103(1)(a); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026). Iron County's own building.gov page and forms index do not publish a distinct county code-adoption page; per Utah's Title 15A compliance-agency model, unincorporated Iron County (like unincorporated Washington County in this corpus) is bound by the statewide-adopted specific editions absent its own published amendment.; 2021 International Residential Code (IRC), including Appendix Q — Utah Code § 15A-2-103(1)(b); unchanged by the July 1, 2026 revision — only the IRC (and NEC) held at their prior editions while the other codes advanced to 2024 — still the current edition.; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026).; 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026).; 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026).; 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); NEC remains 2023 across the 7/1/2026 statutory rollover (not superseded by a 2024/2026 NEC edition in that cycle) — still the current edition.; 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); statute has no residential/commercial split — one edition applies to both.; 2024 International Existing Building Code (IEBC) — Utah Code § 15A-2-103(1)(i); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026).; 2024 International Swimming Pool and Spa Code (ISPSC), residential provisions — Utah Code § 15A-2-103(1)(n); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026).; NOTE (verified 2026-07-16 against the live Utah Code § 15A-2-103 text, version headed 'Effective 7/1/2026 / Superseded 1/1/2027'): the 2024 editions of IBC, IPC, IMC, IFGC, IECC, IEBC, and ISPSC listed above took effect July 1, 2026, replacing the 2021 editions; IRC (2021) and NEC (2023) did not change. The 1/1/2027 version of the statute carries identical editions, so no further flip is expected then. This entry previously (as of lastVerified 2026-07-03) correctly flagged that the rollover had occurred in a trailing note, but the individual code lines above it still led with the 2021 editions as the primary/current statement — corrected on this date so the lines themselves state the current editions. Iron County's own building.gov/building page and its Forms index (ironcountyut.gov/building/forms) do not independently republish specific code-edition numbers, so this file reports the statutory default rather than a county-specific citation — flagged here rather than silently assumed identical to Cedar City's page, which does publish its own distinct Current Adopted Codes list.. Local amendments apply — see the Unincorporated Iron County overview page for the full list.

Per the Iron County Building & Zoning FAQ, a permit is required for any structural, electrical, plumbing, or mechanical work. Accessory structures up to a maximum of 200 square feet without electrical, plumbing, or mechanical work do not require a permit.

Sources & verification

Verified against official sources. Last reviewed 2026-07-03.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Iron County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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