HVAC Replacement permit in Austin, TX
Yes — you need a permit for hvac replacement work in Austin.
Swapping an air conditioner, furnace, or heat pump is mechanical work and needs a mechanical permit, which must be secured before the work starts. As a rule only a Texas-licensed air conditioning and refrigeration contractor who is registered with the City can pull it. Homes outside the city limits are not subject to the permit or the inspection.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Swapping an air conditioner, furnace, or heat pump is mec… |
| Fee | The code does not print a dollar amount. Austin sets permit fees in its adopted fee schedule. |
| Review time | Not in the ordinance |
| Code section | § 25-12-243, R101.2.4 (Persons authorized to obtain permits for mechanical work); BCM 5.5.3; R105.2 exempt list has no HVAC entry |
| Based on | 2024 IRC as amended by Austin (§ 25-12-243, R101.2.4); Building Criteria Manual 4.6.5, 5.5.3 |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Austin building department.
- Pay the permit fee when the permit is issued. Work done before that isn't covered.
- Book each inspection listed on the permit as the job reaches that stage.
Your contractor pulls this one, not you. Ask to see the permit before work starts.
If you skip it
Austin's code doesn't set a specific fine for this work. In practice the department can issue a stop-work order, and unpermitted work tends to surface during a sale, when the buyer's inspector or the title company asks for it.
Nearby cities, same job
Rules stop at the city line. If your lot is near a boundary, or you work across several towns, this is where they differ.
| City | Distance | Permit? | Where the line falls |
|---|---|---|---|
| Austin | — | Yes | Swapping an air conditioner, furnace, or heat pump is mec… |
| New Braunfels | 47 mi | Yes | Replacing a whole air conditioner, furnace, or heat pump … |
| Killeen | 54 mi | Yes | Swapping an air conditioner, furnace, or heat pump is mec… |
| San Antonio | 74 mi | Yes | Replacing an air conditioner, furnace, or heat pump requi… |
| College Station | 89 mi | Yes | No size threshold in the code |
| Conroe | 135 mi | Yes | No size threshold in the code |
Other work in Austin
Questions people ask
How much does a hvac replacement permit cost in Austin?
The code does not print a dollar amount. Austin sets permit fees in its adopted fee schedule.. Valuation-based fees mean the number depends on what the job is worth, so the department quotes it when you apply.
I already built it without a permit. What now?
Austin can issue a stop-work order and require you to apply after the fact, sometimes with an extra fee. Work that was covered up may have to be opened for inspection. Full walkthrough here.
Does unpermitted work cause problems when selling the house?
Often, yes. A buyer's inspector or the title company may flag it, and lenders can balk at financing a home with open or missing permits. What to do about it.
Do I pull the permit or does my contractor?
Your contractor does. A licensed contractor pulling their own permit is the normal arrangement — if one asks you to pull it in your name, treat that as a warning sign, because it moves the liability to you.