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Mechanical / HVAC Permit in Green River, Wyoming

Required for heating, ventilating, cooling, refrigeration, and other mechanical equipment installations in Green River. Governed by the 2024 International Mechanical Code (IMC), adopted by Code of Ordinances Sec. 7-46, and the 2024 International Fuel Gas Code (IFGC) for gas piping, adopted by Sec. 7-91.

Verified 2026-07-01 · Source

When you need this permit

  • All heating, ventilating, cooling, refrigeration systems, incinerators, and other heat-producing appliances must be installed, repaired, and maintained per the 2024 IMC
  • Gas piping systems governed by the 2024 IFGC (Sec. 7-91)
  • Furnace/water heater replacement requires a permit (no site plan required)
  • Portable heating/cooling/ventilation appliances and certain minor part replacements are exempt from permit per the adopted code's Section 105.2 exemptions

Required documents

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Fee schedule

Mechanical/Fuel Gas Permit — charged under the general valuation-based Building Permit fee scheduleCity of Green River Development Services Fees schedule (effective July 1, 2018) covers Mechanical permits under the same general valuation table as Building/Plumbing/Electrical — a verified general-valuation-table fact.
No separate flat mechanical permit fee is published; charged via the same valuation table as the Building Permit (residential work at 50%; commercial/multi-family at 100%)

Review timeline

Plan reviewTypical estimate — confirm current times with the Green River building department
~1–14 business days

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

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 and ductwork installed before walls closed

  2. 2

    Final

    Equipment operational, venting and combustion air verified

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

Tips

  • Green River's high elevation (6,132 ft) and cold winter design temperature (-20°F) mean HVAC equipment sizing (Manual J) should reference the city's specific Manual J design criteria published in the IRC amendment (winter heating -6°F, altitude correction factor 0.84).

Frequently asked questions

Yes, a permit is required for furnace/water heater replacement, though no site plan is needed for this scope of work.

In Green River, the published Mechanical/Fuel Gas Permit — charged under the general valuation-based Building Permit fee schedule is: No separate flat mechanical permit fee is published; charged via the same valuation table as the Building Permit (residential work at 50%; commercial/multi-family at 100%). These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Plan review for a mechanical / hvac permit in Green River typically runs 1–14 business days. This is an estimate, not a published figure — confirm current review times with City of Green River Development Services — Building Inspection Division at (307) 872-6140.

You'll need: Building Permit Application (DocumentCenter Doc #5572). See the required-documents checklist on this page for details on each.

Green River requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough-In / Equipment, Final. Schedule each through City of Green River Development Services — Building Inspection Division ((307) 872-6140).

Apply through City of Green River Development Services — Building Inspection Division at 50 E 2nd North Street, Green River, WY 82935. Phone: (307) 872-6140, email: Contact via Development Services (see department website). Office hours: Monday through Friday, 8:00 a.m. to 5:00 p.m.. Official information: https://www.grwyo.org/87/Building-Inspection.

Green River, Wyoming has adopted: 2024 International Building Code (IBC), including Appendices B, I, J — adopted by City of Green River Code of Ordinances Sec. 7-16 (Ord. No. 16-02, 8-1-16; amended through Ord. No. 25-01, 1-21-25); Chapter 27 (Electrical) of the IBC is deleted by local amendment since electrical is separately governed by the local NEC adoption (Sec. 7-76); 2024 International Residential Code (IRC), including Appendices AA, BA, BE, BF, CA, CB, CD — Sec. 7-17 (Ord. No. 25-01, 1-21-25); local design criteria: Ground Snow Load 30 psf, Wind Speed 115 mph, Seismic Design Category C, Weathering Severe, Frost Line Depth 42 inches, Termite None to Slight, Winter Design Temp -20°F, Ice Shield Underlayment Required, Air Freezing Index 2282, Elevation 6,132 ft; 2024 International Plumbing Code (IPC), including all appendices — Sec. 7-31 (Ord. No. 25-01, 1-21-25), with local amendment to Section 305.4 (Freezing) restricting exterior/attic/crawlspace pipe placement; 2024 International Mechanical Code (IMC), including all appendices — Sec. 7-46 (Ord. No. 25-01, 1-21-25); 2024 International Fuel Gas Code (IFGC) — Sec. 7-91 (Ord. No. 25-01, 1-21-25); National Electrical Code (NEC), latest edition as adopted by the Wyoming State Fire Marshal's Office (2023 NEC was in effect through June 30, 2026; per wsfm.wyo.gov/electrical-safety, the 2026 NEC took effect statewide July 1, 2026) — adopted by reference for Green River under Sec. 7-76 (Ord. No. 16-02, 8-1-16; amended through Ord. No. 25-01, 1-21-25); enforced locally by the City under Home Rule, not by the state electrical program. Local amendments apply — see the Green River 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 Green River 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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