Permit Required? Required
Typical Fee Range $150–$250 Includes a $100 application fee per trade plus individual inspection fees.
Fee Method Flat rate
Apply Online Apply at City of San Antonio Development Services Department →

What's Required in San Antonio

  • Permit required for all system replacements (condenser or air handler).
  • Contractors must have a valid State of Texas ACR license and be registered with the city.
  • Proper secondary drain pan and emergency shut-off required for attic installs.
  • Manual J load calculations required for new system sizing.
  • Duct sealing and insulation must meet current energy code requirements.
  • Final mechanical inspection required upon installation.

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

Yes. San Antonio 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–$250, and the permit is issued by the City of San Antonio 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 Antonio Development Services Department before work starts; it's a five-minute call.

How to Get a HVAC Permit in San Antonio

1

Step 1: Contractor Verification

Verify your HVAC technician is registered with the City of San Antonio DSD.

2

Step 2: Trade Permit Application

The contractor submits a Mechanical Permit via BuildSA.

3

Step 3: Issuance

Replacement permits are typically issued instantly after payment of fees ($150+).

4

Step 4: Installation

Perform work ensuring all safety switches and drains are in place.

5

Step 5: Final Inspection

Schedule a mechanical final inspection through the IVR or portal.

Frequently Asked Questions

Yes, replacing an HVAC unit requires a mechanical permit.
Typically $150 to $250 total.
No, state law requires a licensed HVAC technician for refrigerant and high-voltage work.
Adding or altering ductwork is mechanical work that typically requires a permit in San Antonio. Confirm the scope with the City of San Antonio Development Services Department before starting.