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Mechanical / HVAC Permit in Frederick, Colorado

Required for heating, cooling, and ventilation equipment installation or replacement in Frederick. Governed by the 2024 IMC and 2024 IFGC as locally adopted. Issued by the Town of Frederick Building Department.

Verified 2026-07-06 · Source

When you need this permit

  • Governed by the 2024 IMC and 2024 IFGC as locally adopted by the Town of Frederick
  • Mechanical plans required for new construction and additions, showing equipment and duct locations plus Manual J/D/S HVAC compliance documentation
  • All contractors must hold a current Town of Frederick contractor license; applicable Colorado state trade licensure where required Contractor

Required documents

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Fee schedule

Residential AC/Furnace/Evaporative CoolerTown of Frederick Fee Schedule, effective January 1, 2026
$200.00
Building Permit Fee (valuation-based, for mechanical work billed under the general Building Permit schedule where not a listed flat fee)
$35.00 minimum, scaling per the valuation tiers in the 2026 Fee Schedule
Plan Review Fee
65% of Permit Fee
Re-inspection Fee
$100.00-$120.00 per re-inspection

Review timeline

Plan review
Not published — contact the department

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

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, flues, and equipment placement before concealment

  2. 2

    Final Inspection

    Equipment operational, combustion air and venting verified

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

Tips

  • A residential AC/Furnace/Evaporative Cooler replacement has its own flat $200 fee per the 2026 Fee Schedule — this differs from the general valuation-based Building Permit Fee table used for larger mechanical scopes.

Frequently asked questions

Frederick requires a mechanical / hvac permit for: Governed by the 2024 IMC and 2024 IFGC as locally adopted by the Town of Frederick; Mechanical plans required for new construction and additions, showing equipment and duct locations plus Manual J/D/S HVAC compliance documentation; All contractors must hold a current Town of Frederick contractor license; applicable Colorado state trade licensure where required. If your project isn't listed, confirm with Town of Frederick Building Department at 720-382-5516 (general questions); 720-382-5620 (inspection request line) before starting work.

Yes. Residential AC/Furnace/Evaporative Cooler work carries a flat $200.00 fee per the Town's 2026 Fee Schedule.

Frederick does not publish a plan-review timeline for this permit. Contact Town of Frederick Building Department at 720-382-5516 (general questions); 720-382-5620 (inspection request line) for current turnaround.

You'll need: Permit Application — General (Mechanical scope). See the required-documents checklist on this page for details on each.

Frederick requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough Mechanical, Final Inspection. Schedule each through Town of Frederick Building Department (720-382-5516 (general questions); 720-382-5620 (inspection request line)).

Apply through Town of Frederick Building Department at 401 Locust Street, Frederick, CO 80530 (mailing: PO Box 435, Frederick, CO 80530). Phone: 720-382-5516 (general questions); 720-382-5620 (inspection request line), email: building@frederickco.gov. Office hours: Monday-Friday, 7:30 a.m. - 4:30 p.m. Chief Building Official: mtheile@FrederickCO.gov.. Official information: https://www.frederickco.gov/416/Building-Department.

Frederick, Colorado has adopted: 2024 International Building Code (IBC) — Town of Frederick Building Codes page; 2024 International Residential Code (IRC); 2024 International Fire Code (IFC); 2024 International Mechanical Code (IMC); 2024 International Fuel Gas Code (IFGC); 2024 International Plumbing Code (IPC); 2024 International Existing Building Code (IEBC); 2024 International Energy Conservation Code (IECC); 2024 International Swimming Pool and Spa Code (ISPSC); 2024 International Property Maintenance Code (IPMC); 2023 National Electrical Code (NEC); 2025 Colorado Wildfire Resiliency Code (as published by the State of Colorado Division of Fire Prevention and Control); Colorado Model Electric Ready and Solar Ready Code; All codes adopted with local amendments per Frederick Municipal Code, Chapter 18 (Buildings and Building Regulations) — Town of Frederick Building Codes page (frederickco.gov/141/Building-Codes); Note on code-cycle currency: the Town's own Residential/New Construction Building Permit Checklist (a submittal-requirements document, not the code-adoption page) still directs energy-code compliance via '2021 IECC Energy Code' (REScheck, energy rating report, or prescriptive HERS documentation), even though the live Building Codes page lists 2024 IECC as currently adopted — this is the same pattern seen in other Colorado jurisdictions in this corpus where a static submittal PDF lags the actively-maintained code-adoption webpage. The 2024 IBC/IRC/IECC/IMC/IPC/IFGC/IEBC/ISPSC/IPMC + 2023 NEC list from the Building Codes page is treated as the current, governing adopted-code list for this file; confirm current code edition directly with the Building Department (720-382-5516) before finalizing a code analysis for any specific project, since the checklist PDF may not yet be updated to match the webpage.. Local amendments apply — see the Frederick overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-06.

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 Frederick building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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