Permit Required? Required
Typical Fee Range $1,800 (Base MEP) Per 2026 tables, work involving installation or alteration of regulated equipment (HVAC) starts at $1,800.
Fee Method Flat rate
Apply Online Apply at Chicago Department of Buildings →

What's Required in Chicago

  • A permit is required for any replacement of a furnace, air conditioner, or boiler.
  • Manual J and Manual S load calculations are required for new system sizing.
  • Must comply with current Chicago Energy Transformation Code (Cooling/Heating efficiencies).
  • Gas lines must be pressure tested and inspected if the unit is moved or resized.
  • Proper venting/chimney liner must be verified for high-efficiency furnace conversions.
  • Must be performed by a licensed Mechanical/HVAC contractor.

How to Get a HVAC Permit in Chicago

1

Step 1: Contractor Selection

Hire a Chicago-licensed Mechanical Contractor registered with the DOB.

2

Step 2: Portal Application

Submit the 'Mechanical Permit' request via the online portal.

3

Step 3: Fee Payment

Pay the $1,800 base fee (2026 rate for MEP alterations).

4

Step 4: Installation

Complete the install ensuring all safety controls and vents meet code.

5

Step 5: Inspection

Schedule a final mechanical inspection to verify operation and safety compliance.

Frequently Asked Questions

The 2026 minimum fee for HVAC replacement is $1,800.
No, Chicago requires a licensed contractor for all regulated mechanical equipment work.
Yes, any alteration to the supply or return ductwork system requires a permit.