Permit Required? Required
Typical Fee Range $100–$400 Requires gasfitting or electrical primary fees plus itemized appliance charges.
Fee Method Flat fee
Apply Online Apply at Inspectional Services Department →

What's Required in Boston

  • Manual J load calculations required for new central system sizing.
  • Gasfitting permit required for new furnaces or boilers ($20 primary).
  • Electrical permit mandatory for condenser and air handler wiring.
  • Condensate drainage must be properly piped per mechanical code.
  • Exterior units must meet property line setback and noise ordinances.
  • Proper venting and safety valves must be professionally verified.

How to Get a HVAC Permit in Boston

1

Step 1: System Sizing

Perform load calculations to select the correct unit tonnage.

2

Step 2: Apply Online

Contractors file for gas/electric sub-permits via Boston ISD.

3

Step 3: Installation

Replace the furnace/condenser according to mechanical code.

4

Step 4: Ducting Check

Verify all venting and gas lines meet safety standards.

5

Step 5: Final Inspection

Inspector checks drain lines, safety switches, and performance.

Frequently Asked Questions

Yes, any permanent HVAC installation requires electrical and mechanical permits.
It is a $20 primary fee plus $5 per approved appliance.
No, state law requires licensed technicians for refrigerant and electrical work.