Water Heater permit in Knoxville, TN
Yes — you need a permit for water heater work in Knoxville.
Replacing or relocating a water heater needs a permit; the city keeps official records of water heater permits, and the state exemption for plumbing only covers stopping leaks and clearing stoppages, not swapping out a water heater. A gas water heater also needs a gas or mechanical permit.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Replacing or relocating a water heater needs a permit; th… |
| Fee | Not in the ordinance — the department quotes it |
| Review time | Not in the ordinance |
| Code section | Sec. 2-767 (water heater permits); IRC R105.2 plumbing exemptions |
| Based on | Tennessee-adopted IRC 2018 (plumbing), with City of Knoxville plumbing code |
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 or relocating a water heater needs a permit; th… |
| Farragut | 14 mi | Yes | No size threshold in the code |
| Johnson City | 91 mi | Yes | Replacing or moving a water heater needs a permit. The st… |
| Chattanooga | 96 mi | Yes | Replacing or moving a water heater needs a plumbing permi… |
| Gallatin | 143 mi | Yes | No size threshold in the code |
| Smyrna | 144 mi | Yes | Replacing or relocating a water heater needs a permit. It… |
Other work in Knoxville
Questions people ask
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.