HVAC Pricing and Permit Process in Denver
HVAC costs in Denver depend on the type of work, equipment size, efficiency, ductwork, electrical needs, accessibility, and permit requirements. Repairs may cost a few hundred dollars, while complete furnace, AC, or heat pump replacements can reach several thousand dollars. Denver also requires permits for many mechanical projects, so a written estimate should explain both the equipment and the work needed to install it correctly.
What Does HVAC Work Cost in Denver?
According to Angi’s 2026 Denver HVAC cost data, replacing a furnace and AC together can range from about $5,290 to $13,225, with an average around $7,935. For central AC alone, Angi’s Denver AC replacement guide puts the range at roughly $3,306 to $6,828. Real quotes can land outside those ranges, especially when the project includes higher-efficiency equipment, electrical work, duct changes, or difficult access.
Some of the biggest price drivers include:
- System size and efficiency: Larger or higher-efficiency equipment costs more.
- Ductwork: Leaks, poor airflow, or major duct changes can add to the job.
- Electrical work: Heat pumps and other upgrades may require new circuits or panel work.
- Equipment access: Tight basements, rooftops, and difficult equipment locations can increase labor.
- Permits and related work: A straightforward replacement can have a simpler scope than a project changing fuel type, venting, or system design.
Because the ranges are wide, compare written bids rather than relying on a single online average.
When Does HVAC Work Require a Permit in Denver?
Denver requires mechanical permits for many HVAC projects. The city's current Quick Permits guidance covers work such as residential air conditioning, forced-air heating systems, ductwork, gas piping, ventilation systems, and certain rooftop units.
The permit path depends on the scope. A straightforward equipment replacement may qualify for a trade quick permit, while work that changes the original system, involves more complex commercial equipment, or requires additional agency review may need a fuller review.
Before accepting a bid, ask the HVAC contractor who will pull the permit, what inspections apply, and whether those costs are already included.