How much is an AC permit in Austin?

Standard residential replacement permits typically cost between $125 and $250 total.

Do I need a permit to replace a furnace in Austin?

Yes, all residential heating and cooling unit replacements require a mechanical permit.

Yes, as an owner-occupant, you can pull a permit, but you must still pass a final mechanical inspection.

A mechanical permit is required for replacing any heating or cooling unit (A/C, furnace, or boiler).
Must follow current IECC energy codes for system efficiency, SEER, and EER ratings.
Proper secondary drain pans and safety float switches are mandatory for all attic installations.
Manual J load calculations are required for new system designs to ensure proper capacity and efficiency.
Condenser units must be anchored to a level pad and meet standard property line setbacks.
Must be performed by a licensed Mechanical contractor registered with the City of Austin.

Perform Manual J calculations to select a unit appropriate for Austin's climate and home insulation.

Submit a 'Mechanical Change Out' permit application via the Austin Build + Connect (AB+C) portal.

Pay the flat permit fee ($125 minimum typical) through the online payment system.

Install the unit ensuring all safety switches, pans, and vents meet the 2024 Mechanical Code standards.

Schedule a final mechanical inspection via the AB+C portal to close the permit.