HVAC Replacement permit in Smyrna, TN
Yes — you need a permit for hvac replacement work in Smyrna.
Replacing a full air conditioner, furnace, or heat pump needs a permit. Only portable units and minor parts are exempt.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Replacing a full air conditioner, furnace, or heat pump n… |
| Fee | Not in the ordinance — the department quotes it |
| Review time | Not in the ordinance |
| Code section | IRC R105.2 (mechanical exemptions do not cover full equipment replacement) |
| Based on | IMC 2024 |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Smyrna 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
Work without a required permit is unlawful and punishable under the general penalty provision; each day is a separate offense.
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 |
|---|---|---|---|
| Smyrna | — | Yes | Replacing a full air conditioner, furnace, or heat pump n… |
| La Vergne | 4 mi | Depends | exempt if heating and cooling capacity and fuel source st… |
| Murfreesboro | 10 mi | No | Replacing like package or split HVAC equipment that is pe… |
| Brentwood | 14 mi | Yes | No size threshold in the code |
| Franklin | 18 mi | Yes | No size threshold in the code |
| Nashville | 20 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
Other work in Smyrna
- Fence Depends
- Deck Depends
- Shed Depends
- Swimming Pool Depends
- Roof Replacement Depends
- Water Heater Yes
- HVAC Replacement Yes
- Electrical Panel Yes
- Demolition Yes
- Driveway Depends
- Tree Removal —
- Sign —
- Short-Term Rental —
- ADU (Accessory Dwelling Unit) Yes
- Garage Depends
- Basement Yes
- Above-Ground Pool Depends
Questions people ask
I already built it without a permit. What now?
Smyrna 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.