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Mechanical / HVAC Permit in Unincorporated Campbell County, Wyoming

Required for heating, ventilation, air conditioning, and fuel gas installation work in unincorporated Campbell County. Governed by the 2024 International Mechanical Code (IMC) per Chapter 4 Section 5, and the 2024 International Fuel Gas Code (IFGC) per Chapter 4 Section 7.

Verified 2026-07-01 · Source

When you need this permit

  • Mechanical Permit required for furnace/AC/heat pump installation, ductwork, and gas piping — required even where the associated Building Permit is exempt
  • Gas systems with a design flow requiring DEQ oversight (non-domestic wastewater or specific commercial cases) may require separate DEQ permitting

Required documents

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Fee schedule

Mechanical Permit (residential)Chapter 4 Section 1.8.E 'All Other Permits: No fees.'
No fee

Review timeline

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

How long did your Mechanical / HVAC Permit permit actually take in Unincorporated Campbell 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/Equipment

    Equipment installation and ductwork before walls closed

  2. 2

    Final

    Equipment operational, venting/combustion air verified

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

Tips

  • There is no fee for a residential mechanical/HVAC permit in the unincorporated county.
  • Campbell County adopted the International Mechanical Code (IMC) for all occupancies — it does not use a separate Uniform Mechanical Code for single-family residential.

Frequently asked questions

Unincorporated Campbell County requires a mechanical / hvac permit for: Mechanical Permit required for furnace/AC/heat pump installation, ductwork, and gas piping — required even where the associated Building Permit is exempt; Gas systems with a design flow requiring DEQ oversight (non-domestic wastewater or specific commercial cases) may require separate DEQ permitting. If your project isn't listed, confirm with Campbell County Department of Public Works — Building, Planning & Zoning Division at (307) 682-1970 before starting work.

No fee. Chapter 4 Section 1.8.E ('All Other Permits: No fees') covers residential mechanical/HVAC permits.

Plan review for a mechanical / hvac permit in Unincorporated Campbell County typically runs 1–10 business days. This is an estimate, not a published figure — confirm current review times with Campbell County Department of Public Works — Building, Planning & Zoning Division at (307) 682-1970.

You'll need: Building Permit & Zoning Certificate Application. See the required-documents checklist on this page for details on each.

Unincorporated Campbell County requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough-In/Equipment, Final. Schedule each through Campbell County Department of Public Works — Building, Planning & Zoning Division ((307) 682-1970).

Apply through Campbell County Department of Public Works — Building, Planning & Zoning Division at 500 S. Gillette Ave., Suite 1500, Gillette, WY 82716. Phone: (307) 682-1970, email: septic@campbellcountywy.gov (Small Wastewater System applications); planning@campbellcountywy.gov (Planning & Zoning); general Public Works (307) 685-8061. Office hours: Mon–Fri, 8:00 a.m.–5:00 p.m.. Official information: https://www.ccgov.net/286/Building-Division.

Unincorporated Campbell County, Wyoming has adopted: 2024 International Building Code (IBC) — including Appendices C and J, adopted by Campbell County Chapter 4 Rules Regulating Construction, Section 3 (Amended June 2026); 2024 International Residential Code (IRC) — including Appendices A, B, C and E, adopted Chapter 4 Section 4 (Amended June 2026); 2024 International Mechanical Code (IMC) — including Appendix A, adopted Chapter 4 Section 5; 2024 International Plumbing Code (IPC) — including Appendices A and B, adopted Chapter 4 Section 6 — NOTE: Campbell County uses the IPC, not the Uniform Plumbing Code; 2024 International Fuel Gas Code (IFGC) — all appendices, adopted Chapter 4 Section 7; 2024 International Fire Code (IFC), adopted Chapter 4 Section 8 (enforced by Campbell County Fire Department for Fire Code permits); 2024 International Existing Building Code (IEBC), adopted Chapter 4 Section 9; National Electrical Code (NFPA 70), 2026 Edition — including Informative Annex H, adopted Chapter 4 Section 10; Liquefied Petroleum Gas Code (NFPA 58), 2020 Edition, adopted Chapter 4 Section 11; Wyoming DEQ Water Quality Rules and Regulations Chapter 25 (Septic Tanks, Soil Absorption Systems, and Other Small Wastewater Systems) — adopted as Chapter 4 Appendix 1, administered by Campbell County under delegated authority from Wyoming DEQ (W.S. 35-11-304). Local amendments apply — see the Unincorporated Campbell County overview page for the full list.

Sources & verification

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

Fee schedules

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 Campbell 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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Related guides

Furnace ReplacementCommercial Tenant Improvement

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