HVAC Replacement permit in Knoxville, TN
Yes — you need a permit for hvac replacement work in Knoxville.
Replacing an air conditioner, furnace, or heat pump needs a mechanical permit; the fee schedule in Section 6-82 is for mechanical work. The exemptions cover only portable heaters, portable coolers, portable ventilation units, and small self-contained refrigeration systems, so a whole-house system is not exempt.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Replacing an air conditioner, furnace, or heat pump needs… |
| Fee | Mechanical permit fees are set in the city Fee Schedule adopted by City Council resolution. |
| Review time | Not in the ordinance |
| Code section | Sec. 6-82 (mechanical permit fees); IRC R105.2 mechanical exemptions |
| Based on | Tennessee-adopted IRC 2018 (mechanical), with City of Knoxville mechanical code (Sec. 6-82) |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Knoxville 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
Starting the work before the permit is issued means extra fees on top of the required permit fee (Section 109.4 as amended).
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 |
|---|---|---|---|
| Knoxville | — | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| Farragut | 14 mi | Yes | No size threshold in the code |
| Johnson City | 91 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| Chattanooga | 96 mi | Yes | Replacing an air conditioner, furnace, or heat pump needs… |
| Murfreesboro | 139 mi | No | Replacing like package or split HVAC equipment that is pe… |
| Gallatin | 143 mi | Yes | No size threshold in the code |
Other work in Knoxville
Questions people ask
How much does a hvac replacement permit cost in Knoxville?
Mechanical permit fees are set in the city Fee Schedule adopted by City Council resolution.. 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?
Knoxville 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.