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Residential Building Permit in Unincorporated Millard County, Utah

Required for new residential construction, additions, and structural alterations in unincorporated Millard County. Millard County Building Department (Building Official Adam Richins) issues permits for the unincorporated county and, per a 2020 interlocal arrangement, performs building inspections for Delta City (Delta City Council voted to hire the county for inspections in March 2020, ending its contract with Sunrise Engineering). Fillmore City is NOT covered — Fillmore continues to contract with Sunrise Engineering as of the sources checked.

Verified 2026-07-08 · Source

When you need this permit

  • New single-family dwelling construction
  • Additions to existing residential structures
  • Any structural modification, alteration, repair, move, demolition, or occupancy change (UCA 17-27a-802)
  • All residential dwellings in the unincorporated parts of the County require a Conditional Use Permit recorded with the deed, per Millard County Building Department policy (protection of the agriculture industry in Millard County)
  • Residential structures with 2,500+ sq ft on the main floor and more than one story require construction documents stamped by a licensed structural engineer and/or architect
  • Certified water source capable of delivering minimum 40 psi (Millard County Code 5-2-5; 2009 IRC P2903.3)
  • Minimum electrical service capable of delivering 100 amps continuously (2009 IRC E3602.1)

Required documents

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Fee schedule

Demolition Permit (as reference point for county-published flat fees)Millard County Demolition Application/Permit form (millardcounty.gov). Listed for reference only — see requirements note below on the residential valuation-based fee.
$25.00 + 1% state surcharge ($0.25) = $25.25 total

Review timeline

Plan reviewUnincorporated Millard County’s published plan-review target
3–14 business days

How long did your Residential Building Permit permit actually take in Unincorporated Millard 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

    Before concrete pour — verify rebar placement and size, footing steps and continuity, venting requirements, and damp proofing

  2. 2

    Framing

    After framing, sheathing, and rough-in MEP — before insulation or wall cover

  3. 3

    Final

    All work complete, ready for occupancy

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

Tips

  • Millard County requires a Conditional Use Permit recorded with the deed for all residential dwellings built in the unincorporated parts of the county — this is prepared by the Building Department after the building permit application is approved, to protect the agriculture industry.
  • If the county cannot provide a building inspection within 3 business days of the request, the applicant may engage a third-party inspection firm from the state's approved list (Utah Code § 17-79-810(2)(b), formerly § 17-36-55).
  • Permits become null and void if construction has not commenced within 180 days of issuance, or if work is suspended/abandoned for 180 days.
  • Design criteria per the Millard County Building Inspection page: Roof live load 20 psf, Roof snow load 20 psf, Ground snow load 30 psf, Floor/deck live load 40 psf, Wind load (ultimate) 115 mph, Frost depth 30 inches, Seismic Zone C, Exposure C. (Note: the county's separate 'Residential Plan and Permit Acceptance Policy' document, dated October 2009, lists slightly different figures — 30# snow load, 43# ground snow load, 90/75 MPH wind — treat the current Building Inspection webpage's criteria as authoritative and confirm project-specific values with the Building Official.)
  • Agricultural structures used solely for agricultural purposes (not human occupancy) are exempt from state construction code permit requirements under Utah Code § 15A-1-204(7)(a), with exceptions for structures within city/town boundaries on small lots or platted subdivisions.

Frequently asked questions

Unincorporated Millard County requires a residential building permit for: New single-family dwelling construction; Additions to existing residential structures; Any structural modification, alteration, repair, move, demolition, or occupancy change (UCA 17-27a-802); All residential dwellings in the unincorporated parts of the County require a Conditional Use Permit recorded with the deed, per Millard County Building Department policy (protection of the agriculture industry in Millard County); Residential structures with 2,500+ sq ft on the main floor and more than one story require construction documents stamped by a licensed structural engineer and/or architect; Certified water source capable of delivering minimum 40 psi (Millard County Code 5-2-5; 2009 IRC P2903.3); Minimum electrical service capable of delivering 100 amps continuously (2009 IRC E3602.1). If your project isn't listed, confirm with Millard County Building Department at (435) 864-1400 before starting work.

In Unincorporated Millard County, the published Demolition Permit (as reference point for county-published flat fees) is: $25.00 + 1% state surcharge ($0.25) = $25.25 total. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

No county-specific published SLA or budget-document timeline was found. The applicable statutory floor is Utah Code § 17-79-810(4)(a) (recodified from § 17-36-55, effective 5/7/2025 renumbering) — the county must complete plan review of a one- or two-family dwelling or townhome construction project within 14 business days after the 3-business-day application screening period ends. Total elapsed time from submission is commonly 3-14 business days depending on completeness screening.

You'll need: Building Permit Pre-Application Worksheet; Two Complete Sets of Plans (1/4-inch to foot scale, min. 11x17); Legal Description & Plat Map; Zoning Designation. Depending on your project, Unincorporated Millard County may also ask for: Septic/Sewer Approval; Owner/Builder Agreement; Encroachment Permit from Millard County Road Department. See the required-documents checklist on this page for details on each.

Unincorporated Millard County requires 3 inspection(s) for a residential building permit, in order: Footing / Foundation, Framing, Final. Schedule each through Millard County Building Department ((435) 864-1400).

Apply through Millard County Building Department at 71 South 200 West, PO Box 854, Delta, UT 84624. Phone: (435) 864-1400, email: buildingofficial@millardcounty.org. Office hours: Monday–Thursday 8:00 AM – 5:30 PM; Friday 8:00 AM – 12:00 PM. Official information: https://millardcounty.gov/your-government/county-departments/building-inspection/.

Unincorporated Millard County, Utah has adopted: 2021 International Residential Code (IRC) with State of Utah Amendments — per Utah Code § 15A-2-103(1)(b); unchanged by the July 1, 2026 statewide update. Millard County Building Inspection Department page (adopted codes list) also lists 2021 IRC — live-checked 2026-07-16, page unchanged since last check.; 2024 International Building Code (IBC) with State of Utah Amendments — per Utah Code § 15A-2-103(1)(a), effective since July 1, 2026, superseding the 2021 IBC. NOTE (2026-07-16, live-checked): the Millard County Building Inspection Department page still lists 2021 IBC — the county page is lagging the statewide statutory update by 15+ days; the statute is controlling.; 2024 International Plumbing Code (IPC) with State of Utah Amendments — per Utah Code § 15A-2-103(1)(d), effective since July 1, 2026, superseding the 2021 IPC. NOTE (2026-07-16, live-checked): the county page still lists 2021 IPC — page lag, statute controls.; 2024 International Mechanical Code (IMC) with State of Utah Amendments — per Utah Code § 15A-2-103(1)(e), effective since July 1, 2026, superseding the 2021 IMC. NOTE (2026-07-16, live-checked): the county page still lists 2021 IMC — page lag, statute controls.; 2023 National Electrical Code (NEC) per Utah Code § 15A-2-103(1)(g), statewide in force and NOT changed by the July 1, 2026 update — NOTE: this is a separate, pre-existing discrepancy: Millard County's own Building Inspection page lists 2020 NEC (live-checked again 2026-07-16, page still shows 2020 NEC, unrelated to the 2021→2024 code-edition transition affecting the other codes below). Contractors/homeowners should confirm current applicability with the Building Official as the county page lags the statewide amendment.; 2024 International Fuel Gas Code (IFGC) with State of Utah Amendments — per Utah Code § 15A-2-103(1)(f), effective since July 1, 2026, superseding the 2021 IFGC. NOTE (2026-07-16, live-checked): the county page still lists 2021 IFGC — page lag, statute controls.; 2024 International Energy Conservation Code (IECC), Residential & Commercial — per Utah Code § 15A-2-103(1)(h), effective since July 1, 2026, superseding the 2021 IECC. The statute adopts a single IECC edition with no residential/commercial split (this file's existing single combined line already reflects that — no split to collapse). NOTE (2026-07-16, live-checked): the county page still lists 2021 IECC — page lag, statute controls.; 2024 International Existing Building Code (IEBC) — per Utah Code § 15A-2-103(1)(i), effective since July 1, 2026. Not separately listed on the Millard County Building Inspection Department page (live-checked 2026-07-16, page has no IEBC entry at all) — added here because § 15A-2-103 adopts it statewide regardless of the county page's omission.; 2024 residential provisions of the International Swimming Pool and Spa Code (ISPSC) — per Utah Code § 15A-2-103(1)(n), effective since July 1, 2026. Not separately listed on the Millard County Building Inspection Department page (live-checked 2026-07-16, page has no ISPSC entry at all) — added here because § 15A-2-103 adopts it statewide regardless of the county page's omission.; Utah Wildland Urban Interface Code; NOTE (updated 2026-07-16): The July 1, 2026 statewide code-edition transition (2024 IBC/IPC/IMC/IFGC/IECC replacing 2021 editions, per Utah Code § 15A-2-103 version effective 7/1/2026, superseded 1/1/2027) took effect 15 days ago; the next statute version's editions were diffed and confirmed identical, so this should not go stale again around 1/1/2027. 2021 IRC is unchanged by this transition. The International Fire Code is NOT adopted by § 15A-2-103 (it is addressed separately in Title 15A Chapter 5) and is not otherwise referenced in this file..

For Delta: the Millard County Building Department has performed Delta City's building inspections since March 2020, when the Delta City Council voted to hire the county after ending its contract with Sunrise Engineering (per the Millard County Chronicle Progress article 'County hired to do Delta building inspections,' 3/11/2020; the article's live link has since gone dead and redirects to the paper's homepage, but its content was corroborated via indexed search results naming Delta's public works director and the Sunrise Engineering transition). For Fillmore: no — Fillmore has not signed on to county building inspection services and continues to contract with a private firm (Sunrise Engineering) as of the sources checked 2026-07-08. Always confirm current status with the Millard County Building Department (435-864-1400) or the respective city office, as interlocal arrangements can change.

Other permits in Unincorporated Millard County

Electrical / Mechanical / Plumbing / Stucco PermitDemolition PermitCommercial Building PermitCommercial Tenant Improvement / Tenant Finish PermitPermitted Use Permit (P-1 / P-2) — Change or Establishment of Land UseSign Permit (P-1/P-2/C-1 depending on sign type)EV Charger / EVSE PermitSolar / Solar PV Installation PermitFire Sprinkler / Fire Alarm System Plan Review Permit

Residential Building Permit in other cities

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