HVAC Replacement permit in Houston, TX
Yes — you need a permit for hvac replacement work in Houston.
Replacing a whole air conditioner, furnace, or heat pump needs a permit. The model code only lets you skip a permit for portable units or for swapping a minor part. A full system changeout is regulated mechanical work, so a permit and inspection are required.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Replacing a whole air conditioner, furnace, or heat pump … |
| Fee | Not in the ordinance — the department quotes it |
| Review time | Not in the ordinance |
| Code section | IRC R105.2 |
| Based on | IRC (adopted by reference) |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Houston 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.
If you skip it
Houston'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 |
|---|---|---|---|
| Houston | — | Yes | Replacing a whole air conditioner, furnace, or heat pump … |
| Pearland | 16 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| Pasadena | 17 mi | Yes | No size threshold in the code |
| Sugar Land | 20 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| League City | 26 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| Conroe | 38 mi | Yes | No size threshold in the code |
Other work in Houston
Questions people ask
I already built it without a permit. What now?
Houston 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.