HVAC / Furnace Permit Requirements in Denver, CO
Denver uses Denver Building and Fire Code (based on 2021 I-Codes with amendments). High altitude (5,280 ft) affects HVAC sizing. 30 psf ground snow load. Radon-resistant construction required. Green Building Ordinance for large buildings. ADUs allowed citywide. Email: development.services@denvergov.org
When you DO need a permit
HVAC replacements require a permit in Denver, CO. High altitude derating applies.
Estimated fee: $75 – $250
Typical timeline: 5 business days
Source: Denver Building and Fire Code (2021 I-Codes with amendments)
Changing HVAC type requires permits in Denver, CO.
Estimated fee: $150 – $500
Typical timeline: About 2 weeks
Source: Denver Building and Fire Code (2021 I-Codes with amendments)
Adding central HVAC requires permits in Denver, CO. Manual J at altitude required.
Estimated fee: $300 – $1,000
Typical timeline: About 3 weeks
Source: Denver Building and Fire Code (2021 I-Codes with amendments)
Ductwork modifications require a permit in Denver, CO.
Estimated fee: $100 – $350
Typical timeline: About 2 weeks
Source: Denver Building and Fire Code (2021 I-Codes with amendments)
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Frequently Asked Questions
Estimated permit fees for HVAC / Furnace projects in Denver, CO range from $75 – $250. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller HVAC / Furnace projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Denver can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for HVAC / Furnace permits in Denver is 5 business days. More complex projects may take longer if plan review is required.
Learn More About HVAC / Furnace Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read HVAC / Furnace Guide →