Permit Required? Required
Typical Fee Range $75–$250 A 'Minor Permit' is available for standard residential replacements; fees include a $75 base plus surcharge.
Fee Method Flat rate
Apply Online Apply at San José Department of Planning, Building and Code Enforcement →

What's Required in San Jose

  • Permit required for replacement or relocation of any HVAC furnace, AC unit, or gas line
  • Proper venting and seismic safety checks are mandatory for replacements
  • Contractors must hold a valid CA license and City of San José Tax Certificate
  • Manual J sizing and Title 24 energy compliance forms may be required
  • Duct sealing and insulation must meet 2025 CA Energy Code standards
  • Final mechanical inspection required to verify safe unit operation

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

Yes. San Jose 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 $75–$250, and the permit is issued by the San José Department of Planning, Building and Code Enforcement. 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 San José Department of Planning, Building and Code Enforcement before work starts; it's a five-minute call.

How to Get a HVAC Permit in San Jose

1

Step 1: Minor Permit Application

Visit SJPermits.org and select the 'Minor Residential Mechanical' option.

2

Step 2: Enter Unit Details

Specify the unit type (AC, Furnace, or Heat Pump) and its BTU/Amperage rating.

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Step 3: Immediate Approval

Standard like-for-like replacement permits are typically issued same-day online.

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Step 4: Installation

Install the unit per the 2025 CA Mechanical Code.

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Step 5: Inspection

Schedule a final mechanical inspection through the SJPermits system.

Frequently Asked Questions

Yes, replacing any HVAC equipment requires a mechanical permit.
The base minor permit fee is approx. $75 plus state and city surcharges.
Yes, homeowners can pull permits for like-for-like swaps, but complex refrigerant work may require a licensed technician.
Adding or altering ductwork is mechanical work that typically requires a permit in San Jose. Confirm the scope with the San José Department of Planning, Building and Code Enforcement before starting.