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Mechanical / HVAC Permit in Gilbert, Arizona

Required for installation, alteration, repair, and replacement of mechanical and HVAC systems in the Town of Gilbert. Governed by the 2018 IMC with Town of Gilbert amendments. Like-for-like HVAC equipment replacements by Arizona licensed contractors are exempt from permit per IBC §105.2 item 16 (cross-referenced in Mechanical item 8). New HVAC installations, significant alterations, and ductwork changes require a permit.

Verified 2026-07-16 · Source

When you need this permit

  • Submit through OneStopShop portal at onestopshop.gilbertaz.gov
  • Arizona ROC-licensed mechanical contractor required (owner-builder exemptions may apply for owner-occupied residential) Owner-builderContractor
  • Work must comply with 2018 IMC as amended by Town of Gilbert Technical Codes 2020 Edition
  • Like-for-like HVAC equipment replacements by AZ licensed contractors are exempt from permit (IBC §105.2 Mechanical item 8, cross-reference to Building item 16) Contractor

Required documents

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Fee schedule

Individual Mechanical Permit (Residential) — flat feeSource: Town of Gilbert Development Services Fee Schedules (doc 5883), Applied Miscellaneous Building Fees — Individual Mechanical Permit, Residential, effective July 1, 2025, Resolution 4563.
$150
Individual Mechanical Permit (Commercial) — flat feeSource: Town of Gilbert Development Services Fee Schedules (doc 5883), Applied Miscellaneous Building Fees — Individual Mechanical Permit, Commercial, effective July 1, 2025, Resolution 4563.
$300
Building Permit Fee — valuation-based (for larger mechanical projects)Source: Town of Gilbert Development Services Fee Schedules (doc 5883), Building Permit and Plan Review Fees Table, effective July 1, 2025, Resolution 4563.
Same valuation-based table as building permits; $50.00 minimum for work valued $1.00–$1,100.00
Plan Review Fee (where plan review is required)Source: Town of Gilbert Development Services Fee Schedules (doc 5883), effective July 1, 2025, Resolution 4563.
65% of the calculated Building Permit Fee
Re-inspection FeeSource: Town of Gilbert Development Services Fee Schedules (doc 5883), Applied Miscellaneous Building Fees, effective July 1, 2025, Resolution 4563.
$150

Review timeline

Plan reviewGilbert’s published plan-review target
3–3 business days

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

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Inspection process

  1. 1

    Rough Mechanical Inspection

    Inspection of mechanical rough-in before concealment

  2. 2

    Final Mechanical Inspection

    Final inspection confirming all mechanical work complete and compliant

See the full Gilbert inspection guide — scheduling & re-inspection fees →

Tips

  • Like-for-like HVAC equipment replacements by an Arizona licensed contractor are exempt from permit per Gilbert's local amendment IBC §105.2 Mechanical item 8. Contractor
  • OTC (Over the Counter) review may be available for gas lines and like-for-like change-outs per the Plan Review Programs document.
  • Commercial electric, plumbing, and mechanical permit reviews have a 3/3 working-day goal.
  • Individual flat-fee mechanical permits: $150 residential, $300 commercial (adopted July 1, 2025).

Frequently asked questions

Not if it is a like-for-like replacement performed by an Arizona licensed contractor — exempt per Gilbert's local amendment IBC §105.2 Mechanical item 8. New equipment installations, system modifications, and ductwork changes require a permit.

In Gilbert, the published Individual Mechanical Permit (Residential) — flat fee is: $150. Additional published fees: Individual Mechanical Permit (Commercial) — flat fee — $300; Building Permit Fee — valuation-based (for larger mechanical projects) — Same valuation-based table as building permits; $50.00 minimum for work valued $1.00–$1,100.00; Plan Review Fee (where plan review is required) — 65% of the calculated Building Permit Fee; Re-inspection Fee — $150. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Gilbert's published plan-review target for a mechanical / hvac permit is 3–3 business days.

You'll need: Mechanical Permit Application. Depending on your project, Gilbert may also ask for: Mechanical Plans. See the required-documents checklist on this page for details on each.

Gilbert requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough Mechanical Inspection, Final Mechanical Inspection. Schedule each through Town of Gilbert Development Services Department — Plan Review and Inspection Division ((480) 503-6700).

Apply through Town of Gilbert Development Services Department — Plan Review and Inspection Division at 90 E. Civic Center Drive, Gilbert, AZ 85296. Phone: (480) 503-6700, email: onestopshop@gilbertaz.gov. Office hours: Monday–Thursday: 7:00 AM–6:00 PM; Friday: Closed (Town Hall operates a 4-day/10-hour week; confirmed live on the Development Services department page 2026-07-16). Official information: https://www.gilbertaz.gov/departments/development-services.

Gilbert, Arizona has adopted: 2018 International Building Code (IBC), with Appendices C, I, and K, and Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739, Town of Gilbert Technical Codes 2020 Edition); 2018 International Residential Code (IRC), with Appendices H, P, and Q, and Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Mechanical Code (IMC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Plumbing Code (IPC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Energy Conservation Code (IECC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Fuel Gas Code (IFGC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Fire Code (IFC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2018 International Green Construction Code (IgCC) — voluntary adoption only — effective January 1, 2020 (Ordinance 2739); 2017 National Electrical Code (NEC), with Town of Gilbert amendments — effective January 1, 2020 (Ordinance 2739); 2010 ADA Standards for Accessible Design — effective January 1, 2020 (Ordinance 2739); Town of Gilbert Technical Codes 2020 Edition — local amendment overlay (Code of Gilbert Chapter 10, Sections 10-31 and 10-32) incorporating December 2023 amendments per gilbertaz.gov Document 35111. Local amendments apply — see the Gilbert overview page for the full list.

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Mechanical / HVAC Permit in other cities

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