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Mechanical / HVAC Permit in Unincorporated Cache County, Utah

Required for furnace/AC replacement and gas line/meter upgrades in unincorporated Cache County. The county FAQ indicates simple furnace replacements may use a utility permit — call to confirm. Governed by the 2024 International Mechanical Code (IMC) / 2024 International Fuel Gas Code (IFGC) as adopted by Utah Code § 15A-2-103, effective July 1, 2026 (2021 editions governed through June 30, 2026).

Verified 2026-07-17 · Source

When you need this permit

  • Furnace or AC replacement (residential)
  • Gas line or meter upgrade
  • New HVAC system installation
  • Ductwork installation or major modification

Required documents

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Fee schedule

Furnace/AC Replacement (Residential)Cache County Building Division Fee Schedule, Ord. 2024-18 (adopted 11/6/2024); fee schedule PDF re-fetched and re-confirmed live 2026-07-17 (flat fee, unchanged)
$75
Gas Line/Meter Upgrade (Residential)Cache County Building Division Fee Schedule, Ord. 2024-18
$75
State SurchargeCache County Building Division Fee Schedule, Ord. 2024-18
1% of permit fee
Re-Inspection FeeCache County Building Division Fee Schedule, Ord. 2024-18
$75

Review timeline

Plan reviewTypical estimate — confirm current times with the Unincorporated Cache County building department
~3–10 business days

How long did your Mechanical / HVAC Permit permit actually take in Unincorporated Cache County?

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

Inspection process

  1. 1

    Rough-In

    Ductwork and gas piping installed, before walls closed — verify clearances and support

  2. 2

    Final

    Equipment operational, combustion air verified, gas pressure tested, thermostat functional

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

Tips

  • Cache County's FAQ states: 'If you're just replacing a furnace or an electrical panel, contact our office for a utility permit.' Call (435) 755-1650 press 1 to confirm the exact permit type for your project.
  • A Manual J&D form from your mechanical contractor is required when replacing a furnace in a remodel project.
  • Unincorporated Cache County follows the 2024 IMC/IFGC, in effect since July 1, 2026 (2021 editions governed through June 30, 2026).
  • High-efficiency furnaces require condensate drain lines — plan routing before installation.

Frequently asked questions

Yes. Cache County requires a permit for furnace replacements. The fee is $75 per the Building Division Fee Schedule (Ord. 2024-18, adopted 11/6/2024). Contact (435) 755-1650 press 1 to confirm permit type — simple replacements may use a utility permit.

Per the Cache County Building Division Fee Schedule (Ord. 2024-18, adopted 11/6/2024): furnace/AC replacement $75; gas line/meter upgrade $75; plus 1% state surcharge. Re-inspection is $75.

Plan review for a mechanical / hvac permit in Unincorporated Cache County typically runs 3–10 business days. This is an estimate, not a published figure — confirm current review times with Cache County Building Division at (435) 755-1650.

You'll need: Building Permit Application. Depending on your project, Unincorporated Cache County may also ask for: Manual J&D Form; Equipment Specifications. See the required-documents checklist on this page for details on each.

Unincorporated Cache County requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough-In, Final. Schedule each through Cache County Building Division ((435) 755-1650).

Apply through Cache County Building Division at 179 N Main St, Suite 305, Logan, UT 84321. Phone: (435) 755-1650, email: cachecountyplanreview@gmail.com. Office hours: Mon–Fri 8:00 AM – 5:00 PM (permit pickup/payment ends at 4:45 PM). Official information: https://www.cachecounty.gov/building/.

Unincorporated Cache County, Utah has adopted: 2024 International Building Code (IBC), including Appendices C and J — Utah Code § 15A-2-103(1)(a); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2021 International Residential Code (IRC), plus Appendix AQ of the 2021 IRC — Utah Code § 15A-2-103(1)(b)/(c); unchanged by the July 1, 2026 revision — 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); 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. NOTE (county page live-checked 2026-07-16): the Cache County Building Code Information page lists 2024 IECC in its main statewide-codes list but separately carries a 'Residential Code: 2021 IRC and the 2021 IECC' line for dwellings up to a duplex — that residential IECC carve-out lags the statute, which adopts a single 2024 IECC edition with no residential/commercial split; the statewide 2024 IECC governs.; 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); 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); statewide in force, unchanged by the July 1, 2026 revision. NOTE: The Cache County Building Code Information page (last seen 2026-06-30) still lists '2020 NEC' — that page is not updated; the statewide 2023 NEC is the legally in-force edition.; 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 file previously forecast this change but still led with the 2021 editions as current — corrected on this date..

Sources & verification

Verified against official sources. Last reviewed 2026-07-17.

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 Cache County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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Mechanical / HVAC Permit in other cities

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