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Mechanical / HVAC Permit in Lehi, Utah

Required for heating, ventilation, and air conditioning installations, replacements, and ductwork modifications in Lehi. Governed by the 2024 International Mechanical Code (IMC) as adopted by Utah Code § 15A-2-103, effective 2026-07-01 (superseded the 2021 edition). Lehi's fee schedule does not publish a separate flat-fee table for mechanical permits; all permits use the standard valuation-based building permit fee schedule.

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 or wood-burning stove installation

Required documents

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Fee schedule

Mechanical Permit FeeAssessed on project valuation per Lehi City's building permit fee schedule, cited: Lehi City FY 2026 Fee Schedule (approved), Building Inspections section — confirmed by direct review of the full published fee schedule that no separate flat-fee mechanical table exists; mechanical permits are priced under the same valuation-based schedule as other permit types. Reinspection fee: $100.
Valuation-based per Lehi City building permit fee schedule

Review timeline

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

How long did your Mechanical / HVAC Permit permit actually take in Lehi?

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 Lehi inspection guide — scheduling & re-inspection fees →

Tips

  • Like-for-like furnace and AC replacements in Lehi still require a mechanical permit.
  • Lehi follows the 2024 IMC, effective July 1, 2026 (superseded the 2021 edition).
  • High-efficiency furnaces require condensate drain lines — plan routing before installation.
  • Schedule inspections at least 24 hours in advance by calling (385) 201-1035. Inspections will not be scheduled by voicemail, email, or online.

Frequently asked questions

Yes. Lehi requires a mechanical permit for all furnace replacements, including same-model swaps. Submit via the Lehi Building Permit Submittal Portal at lehibuilding.portal.iworq.net.

Lehi does not publish a separate flat-fee mechanical permit table. Mechanical permit fees are valuation-based per the Lehi City FY 2026 Fee Schedule. Contact Lehi Building and Inspections at (385) 201-1035 for a project-specific estimate.

Plan review for a mechanical / hvac permit in Lehi typically runs 3–10 business days. This is an estimate, not a published figure — confirm current review times with Lehi City Building and Inspections at (385) 201-1035.

You'll need: Building Permit Application. Depending on your project, Lehi may also ask for: Manual J Load Calculation; Equipment Specifications; Contractor License. See the required-documents checklist on this page for details on each.

Lehi requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough-In, Final. Schedule each through Lehi City Building and Inspections ((385) 201-1035).

Apply through Lehi City Building and Inspections at 153 N 100 E, Lehi, UT 84043. Phone: (385) 201-1035, email: building@lehi-ut.gov. Office hours: Mon–Thu 8 a.m.–5 p.m. (office); phone hours Mon–Thu 7:30 a.m.–5 p.m., Fri 8 a.m.–3:30 p.m. — call (385) 201-1035 to confirm. Official information: https://www.lehi-ut.gov/departments/building-and-inspections/.

Lehi, Utah has adopted: 2024 International Building Code (IBC) — Utah Code § 15A-2-103(1)(a); effective 2026-07-01, superseded the 2021 edition. NOTE (verified 2026-07-16): Lehi's own Building and Inspections page still lists 'Current Codes: 2021 I Codes' — the city's page has not been updated to reflect the 2024 editions that took effect statewide on 2026-07-01.; 2021 International Residential Code (IRC) — Utah Code § 15A-2-103(1)(b); unchanged by the 7/1/2026 code cycle; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); effective 2026-07-01, superseded the 2021 edition; 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); effective 2026-07-01, superseded the 2021 edition; 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); effective 2026-07-01, superseded the 2021 edition; 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); unchanged by the 7/1/2026 code cycle. NOTE (verified 2026-07-16): Lehi's own Building and Inspections page lists '2020 NEC' — this is stale independent of the 7/1/2026 code cycle; the 2023 NEC has governed statewide since its own adoption (predating this fix and not caused by it).; 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); effective 2026-07-01, superseded the 2021 edition; 2024 International Existing Building Code (IEBC) — Utah Code § 15A-2-103(1)(i); effective 2026-07-01, superseded the 2021 edition; 2024 International Swimming Pool and Spa Code (ISPSC), residential provisions — Utah Code § 15A-2-103(1)(n); effective 2026-07-01, superseded the 2021 edition; ICC/ANSI A117.1-2017 (Accessible and Usable Buildings and Facilities) — Lehi City Building and Inspections page; NOTE (verified 2026-07-16): The 2024 editions of IBC, IPC, IMC, IFGC, IECC, IEBC, and ISPSC took effect 2026-07-01 per Utah Code § 15A-2-103, superseding the 2021 editions that governed through 2026-06-30. The 2021 IRC and 2023 NEC were NOT changed by this cycle. Confirmed directly against the version of § 15A-2-103 effective 7/1/2026 (superseded 1/1/2027) at le.utah.gov. Lehi's own page (lehi-ut.gov/departments/building-and-inspections/) was checked live on 2026-07-16 and still reads 'Current Codes: 2021 I Codes' / '2020 NEC' — it reflects neither the 2024 code cycle nor the separately longer-standing 2023 NEC.. Local amendments apply — see the Lehi 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 Lehi 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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