Permit Required? Required
Typical Fee Range $150–$350 A 'Simple No-Plan Mechanical Permit' is used for residential HVAC replacements.
Fee Method Flat rate
Apply Online Apply at City of San Diego Development Services Department →

What's Required in San Diego

  • Permit required for installation or replacement of air conditioning units, furnaces, or heat pumps
  • Requires a Simple No-Plan Mechanical Permit for single-family homes and duplexes
  • A gas permit is required for any gas line repairs or meter resets
  • Mechanical plans not required for standard replacements, but energy calcs may be requested
  • The contractor or property owner must apply via the online portal
  • Final mechanical inspection is required to verify line sets and safe operation

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

Yes. San Diego 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 $150–$350, and the permit is issued by the City of San Diego Development Services Department. 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 City of San Diego Development Services Department before work starts; it's a five-minute call.

How to Get a HVAC Permit in San Diego

1

Step 1: OpenDSD Login

Register or log into the OpenDSD online permitting portal.

2

Step 2: Select 'No-Plan'

Choose the 'Simple No-Plan Mechanical Permit' category for HVAC work.

3

Step 3: Application Detail

Enter the specific unit details (BTU rating, model) and project address.

4

Step 4: Fee Payment

Pay the fixed processing and inspection fees online ($150+).

5

Step 5: Schedule Inspection

Once the unit is installed, schedule the final mechanical inspection via the portal.

Frequently Asked Questions

Yes, a Simple No-Plan Mechanical permit is required for any HVAC replacement.
Total fees start around $150 to $250 for a standard residential replacement.
Yes, if you are the property owner, you can pull a homeowner permit for HVAC work.
Adding or altering ductwork is mechanical work that typically requires a permit in San Diego. Confirm the scope with the City of San Diego Development Services Department before starting.