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Mechanical / HVAC Permit in Unincorporated Davis County, Utah

Required for heating, ventilation, and air conditioning installations in Unincorporated Davis County. Davis County uses a unified building permit — include HVAC scope in the building permit application. Furnace and AC unit installations are specifically called out on the Davis County building permits page as requiring a permit.

Verified 2026-07-01 · Source

When you need this permit

  • Furnace or boiler installation or replacement
  • Air conditioning system installation or replacement
  • Ductwork installation or major modification
  • Evaporative cooler installation
  • Fireplace installation (gas or wood — see also Wood Stove permit)
  • Any work on mechanical systems per Davis County Code § 15.01.330

Required documents

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Fee schedule

Furnace or AC replacement (one inspection, no plan check, no bond)Grounded verbatim on the live Davis County Building Permits page (fetched 2026-07-01): 'Permits that require no plan check review, construction bond, and just one inspection; are the minimum $202. Examples of this include: furnaces & AC unit installations, power-to-panel repairs/upgrades, new meters.' Fee schedule PDF (§ 2.48.050, Ord. 4-2017) lists a $200.00 codified base minimum; the county's current webpage publishes $202 as the applicable figure for these permits. Source: daviscountyutah.gov/ced/planning/building-permits.
$202.00 minimum
HVAC scope included in building permit (new construction / major remodel)Include mechanical valuation in total project valuation.
Valuation-based per the Davis County Building Permit Fee Schedule (§ 2.48.050, Ord. No. 4-2017)
Wood StoveDavis County Code § 2.48.050(A), Ord. No. 4-2017 (amended 05/23/2017). Current fee schedule PDF posted at daviscountyutah.gov.
$288.00 flat fee
Plan ReviewDavis County Code § 2.48.050(A). May not apply to simple one-inspection permits.
65% of the building permit fee, or actual cost, whichever is less

Review timeline

Plan reviewTypical estimate — confirm current times with the Unincorporated Davis County building department
~1–10 business days

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

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

Inspection process

  1. 1

    Rough Mechanical

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

  2. 2

    Gas Line Air Test

    Gas piping pressure tested (for gas appliances)

  3. 3

    Final Mechanical

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

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

Tips

  • Davis County explicitly lists furnace and AC installations as permit-required on their building permits page.
  • Furnace/AC replacements are simple one-inspection permits (~$202 minimum, no plan review, no bond).
  • Wood stoves have their own flat fee of $288 per the Davis County fee schedule (§ 2.48.050, Ord. 4-2017).
  • Davis County follows statewide adopted mechanical codes: 2021 IMC through June 30, 2026; 2024 IMC effective July 1, 2026.

Frequently asked questions

Yes. Davis County explicitly lists furnace and AC unit installations on their building permits page as requiring a permit. The permit is a simple one-inspection type with a minimum fee of approximately $202. Apply at daviscounty.portal.iworq.net.

Wood stoves have a flat permit fee of $288 per Davis County Code § 2.48.050 (Ord. 4-2017).

Plan review for a mechanical / hvac permit in Unincorporated Davis County typically runs 1–10 business days. This is an estimate, not a published figure — confirm current review times with Davis County Community & Economic Development — Planning & Zoning at (801) 451-3278.

You'll need: Building Permit Application (iworq). Depending on your project, Unincorporated Davis County may also ask for: Equipment Specifications. See the required-documents checklist on this page for details on each.

Unincorporated Davis County requires 3 inspection(s) for a mechanical / hvac permit, in order: Rough Mechanical, Gas Line Air Test, Final Mechanical. Schedule each through Davis County Community & Economic Development — Planning & Zoning ((801) 451-3278).

Apply through Davis County Community & Economic Development — Planning & Zoning at 61 South Main Street, Suite 304, Farmington, UT 84025. Phone: (801) 451-3278, email: planning@daviscountyutah.gov. Office hours: Mon–Fri 8:00 AM – 5:00 PM. Official information: https://www.daviscountyutah.gov/ced/planning/building-permits.

Unincorporated Davis County, Utah has adopted: 2024 International Building Code (IBC) — Utah Code § 15A-2-103(1)(a); effective July 1, 2026 (replaces 2021 IBC); 2021 International Residential Code (IRC) — Utah Code § 15A-2-103(1)(b); remains in force after July 1, 2026; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); effective July 1, 2026 (replaces 2021 IPC); 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); effective July 1, 2026 (replaces 2021 IMC); 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); effective July 1, 2026 (replaces 2021 IFGC); 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); statewide in force. NOTE: Davis County's own website does not list a specific NEC edition — the statewide 2023 NEC is the legally in-force edition.; 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); effective July 1, 2026 (replaces 2021 IECC); Utah residential energy provisions effectively follow 2015 IECC residential; 2024 International Existing Building Code (IEBC) — Utah Code § 15A-2-103(1)(i); effective July 1, 2026 (replaces 2021 IEBC); 2024 International Swimming Pool and Spa Code (ISPSC), residential provisions — Utah Code § 15A-2-103(1)(n); effective July 1, 2026; NOTE: Through June 30, 2026, the 2021 editions of IBC, IPC, IMC, IFGC, IECC, IEBC, and ISPSC are in force per Utah Code § 15A-2-103 (version effective through 6/30/2026). Local amendments apply — see the Unincorporated Davis County overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-01.

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 Davis 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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