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Mechanical / HVAC Permit (Furnace, Air Conditioning, Gas Fireplace) in Milliken, Colorado

Required for furnace, air conditioning system, and gas fireplace installation or replacement in Milliken. Categorized as a 'Counter Permit' (24-72 hour approval). Governed by the 2024 IMC/IFGC as adopted.

Verified 2026-07-06 · Source

When you need this permit

  • 'Water heater, furnace, AC system,' and 'gas fireplace' are each listed among the Town's Counter Permit categories
  • Mechanical contractors must be registered with the Town of Milliken via CommunityCore and hold a current active Colorado state license
  • Homeowners may self-perform mechanical work on their own residence via a notarized Homeowners Affidavit Owner-builder

Required documents

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Fee schedule

Building Permit Admin. FeeTown of Milliken Fee Schedule, effective May 1, 2026, Chapter 18, p.7 — no standalone flat mechanical-permit fee line item distinct from the Admin. Fee was found published
10% of combined Building, Electrical, Construction Meter, and Plan Review fees

Review timeline

Plan reviewMilliken’s published plan-review target
0–3 business days

How long did your Mechanical / HVAC Permit (Furnace, Air Conditioning, Gas Fireplace) permit actually take in Milliken?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Mechanical Rough

    Equipment/ductwork before concealment, where applicable

  2. 2

    Mechanical Final

    Equipment operational, venting verified

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

Tips

  • Furnace, AC, and gas fireplace permits are all grouped under the Town's fast 24-72 hour 'Counter Permit' track, distinct from the slower 10-14 business day Residential Permit track that applies to full remodels.

Frequently asked questions

Yes. Furnace replacement is listed as a 'Counter Permit' on the Town's Building Application Process page, with 24-72 hour approval.

In Milliken, the published Building Permit Admin. Fee is: 10% of combined Building, Electrical, Construction Meter, and Plan Review fees. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Milliken's published plan-review target for a mechanical / hvac permit (furnace, air conditioning, gas fireplace) is 0–3 business days.

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

Milliken requires 2 inspection(s) for a mechanical / hvac permit (furnace, air conditioning, gas fireplace), in order: Mechanical Rough, Mechanical Final. Schedule each through Town of Milliken Building Department (contracted operations administered by SAFEbuilt, formerly branded ProCode Inc.) (970-587-4331 (Town Hall / general inquiries); 970-652-5224 (Building Permit Tech / Community Development); 970-305-3161 ext. 1 (Inspections, ProCode/SAFEbuilt)).

Apply through Town of Milliken Building Department (contracted operations administered by SAFEbuilt, formerly branded ProCode Inc.) at 1101 Broad Street, Milliken, CO 80543 (Town Hall / Building Department); ProCode/SAFEbuilt regional office at 39 S. Parish Avenue, Suite 220, Johnstown, CO 80534. Phone: 970-587-4331 (Town Hall / general inquiries); 970-652-5224 (Building Permit Tech / Community Development); 970-305-3161 ext. 1 (Inspections, ProCode/SAFEbuilt), email: bldgdept@millikenco.gov (Building Department); COemail@safebuilt.com (SAFEbuilt general); jgesick@safebuilt.com and jogonzalez@safebuilt.com (Building Officials). Office hours: Monday-Friday, 8 a.m. to 5 p.m., per the Town's Building Department page. Official information: https://millikenco.gov/160/Building.

Milliken, Colorado has adopted: 2024 International Building Code (IBC) — Town of Milliken Inspections & Building Codes page, https://millikenco.gov/163/Inspections-Building-Codes; 2024 International Residential Code (IRC); 2024 International Existing Building Code (IEBC); 2024 International Fuel Gas Code (IFGC); 2024 International Property Maintenance Code (IPMC); 2024 International Mechanical Code (IMC); 2024 International Plumbing Code (IPC); 2024 International Swimming Pool and Spa Code (ISPSC); 2023 National Electrical Code (NEC); 2024 International Energy Conservation Code (IECC); 2024 International Fire Code (IFC); Code Amendments and Adopting — Ordinance No. 834 (adopted December 22, 2025), which brings the Town's codes into alignment with the respective 2024 ICC editions listed above; Milliken Municipal Code, Chapter 18 (Building Regulations). Local amendments apply — see the Milliken 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 Milliken building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Milliken

Residential Building Permit (New Construction / Any New Structure)Residential Addition / Remodel Permit (including Basement Finish, Deck, Detached Garage)Electrical Permit (Electrical Service Change)Plumbing Permit (Water/Sewer Line Repair)Roofing Permit (Re-roofing)Residential Solar (PV) PermitElectric Vehicle (EV) Charger PermitDemolition PermitFence / Wall Permit

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