HVAC Permit Fee Calculator — Estimate Your Permit Cost (2025)

Fee Estimator

Estimate Your Permit Fee

Select your state, jurisdiction type, and project details for an estimated fee range.

Your State

Area Type

Project Type

Estimated Job Value

$105 – $150

Estimated mechanical permit fee for this project type and jurisdiction

📌

How to Use This Estimate

This calculator provides a fee range based on real building department data. Use it to sanity-check your contractor's quote. If your contractor's permit line item is significantly higher than this estimate, ask them to show you the actual permit receipt. If it's lower, confirm a permit was actually pulled — not just promised.

What's Included in an HVAC Permit Fee?

The permit fee you pay (through your contractor) typically covers:

Application processing: Staff time to review and issue the permit
One inspection: The final inspection visit for residential replacements
One re-inspection (most jurisdictions): The first re-inspection after a failure is usually included at no additional cost
State surcharges (in some states): Florida adds 2.5%; Michigan and Washington have their own surcharges
Technology fees (some jurisdictions): $5–$25 for online portal processing

Not typically included in the base permit fee:

Additional re-inspections after the first (usually $50–$100 each)
Plan review fees (for new installations or commercial projects)
Separate electrical permit (required for new circuits — mini-splits, heat pumps)

Verified Fee Data for Key Jurisdictions

Jurisdiction	Residential Replacement	Each Add'l Unit	Mini-Split (Mech Only)	Retroactive Penalty
Boone County, KY	$105	$50	$105	2× ($210)
City of Cincinnati, OH	$80–$150 (valuation)	—	$80–$120	+25–100%
Hamilton County, OH	$90–$120	—	$90–$120	2×
Louisville Metro, KY	Valuation-based	—	Valuation-based	2×
Orange County, FL	$125–$175	$50–$75	$100–$150	2×
Maricopa County, AZ	$110–$175	—	$110–$175	2×

Disclaimer: Fee estimates are based on published building department fee schedules as of May 2025. Actual fees vary and change. Always confirm the current fee directly with your building department before budgeting.