Permit Required? Required
Typical Fee Range $100–$300 Standard flat fee for residential system replacement.
Fee Method Flat fee
Apply Online Apply at Department of Permits, Licenses, and Inspections →

What's Required in Pittsburgh

  • Mechanical permit required for all HVAC unit replacements.
  • Manual J load calculations required for new system sizing.
  • Electrical permit required for power connections to the unit.
  • Proper venting and condensate drainage must be installed.
  • Exterior unit must meet property line setbacks.
  • Gas piping permit required if switching from electric to gas heat.

Do You Need a Permit to Replace an AC or Furnace in Pittsburgh?

Yes. Pittsburgh treats HVAC replacement as permit-required work, and that includes the common case people hope is exempt: a like-for-like swap of a furnace, AC condenser, or heat pump in the same location. Permit fees typically run $100–$300, and the permit is issued by the Department of Permits, Licenses, and Inspections. In practice your HVAC contractor pulls it as part of the job — if a bid doesn't mention the permit, ask why, because unpermitted mechanical work surfaces at home sale time and in insurance claims.

HVAC Repairs vs. Replacement: Where the Permit Line Falls

The line falls at equipment, not maintenance. Repairs that keep an existing system running — a blower motor, capacitor, control board, or a thermostat swap on existing wiring — generally don't need a permit. Replacing the equipment itself, adding or reworking ductwork, or running new gas or electrical almost always does. Refrigerant-line and coil replacements sit in the gray zone and vary by city. When the scope is unclear, describe the exact job to the Department of Permits, Licenses, and Inspections before work starts; it's a five-minute call.

How to Get a HVAC Permit in Pittsburgh

1

Step 1: System Sizing

Perform load calculations to select the correct HVAC unit.

2

Step 2: Submit Application

Apply for mechanical and electrical permits online.

3

Step 3: Installation

Replace the unit and ductwork according to code.

4

Step 4: Safety Check

Ensure all gas and electrical connections are secure.

5

Step 5: Final Inspection

Inspector checks venting, drainage, and safety switches.

Frequently Asked Questions

Yes, any permanent mechanical heating or cooling system requires one.
Yes, for their own primary residence.
A standard residential system replacement permit is roughly $100–$150.
Yes — furnace and AC replacements require a mechanical permit in Pittsburgh, even like-for-like swaps. Fees typically run $100–$300; your contractor normally pulls the permit.
Adding or altering ductwork is mechanical work that typically requires a permit in Pittsburgh. Confirm the scope with the Department of Permits, Licenses, and Inspections before starting.