Tennessee permit requirements
We have read and dated 30 permit rules across 3 jurisdictions in Tennessee. They do not all say the same thing: pool thresholds alone run from 24 to 30 inches across 2 of them.
- Jurisdictions
- 3
- Verified rules
- 30
- Permit always required
- 16
- Depends on the project
- 6
Do you need a building permit in Tennessee?
Usually yes, but not from Tennessee itself: permits are issued by the city or county, not the state, so the rule that governs your project is the one your own jurisdiction publishes. 16 of those local rules require a permit outright, 6 depend on a size or scope condition the office publishes, and 3 need none. Tennessee sets the building code those local rules derive from; your city or county sets the threshold and the fee.
Recent rule changes in Tennessee
Nashville's Department of Codes and Building Safety published an updated Building Permit Fee Schedule to nashville.gov in December 2025, replacing a rate sheet that had been posted online since April 2010.
Nashville-Davidson County, TN · BL2022-1215 (Metro Fee Schedule Legislation) · published
Do Tennessee jurisdictions agree?
Every row below is a measurement at least two Tennessee jurisdictions publish, compared against each other. This is the question a statewide answer cannot settle, because the number that governs your project is the one your own city or county publishes.
| Project | Published threshold | Jurisdictions | Agreement |
|---|---|---|---|
| Pool | 24 to 30 inches | 2 | 2 different numbers |
0 of 1 comparable measurement are uniform across Tennessee; 1 is not. Latest verification 2026-08-16.
Where Tennessee jurisdictions split
The verdict for each project across the 3 Tennessee jurisdictions we cover. On 6 of 10 projects they do not give the same answer, which is why a statewide answer is not one.
| Project | Permit required | Depends | No permit | Across the state |
|---|---|---|---|---|
| Deck | 2 | 1 | Answer varies | |
| Plumbing | 2 | 1 | Answer varies | |
| Pool | 1 | 2 | Answer varies | |
| Roof Replacement | 1 | 2 | Answer varies | |
| Fence | 1 | 1 | Answer varies | |
| Shed | 1 | 1 | Answer varies | |
| Electrical | 3 | Same answer everywhere | ||
| HVAC | 3 | Same answer everywhere | ||
| Solar | 2 | Same answer everywhere | ||
| Patio | 1 | Same answer everywhere |
Building without a permit in Tennessee
Tennessee runs a state residential building permit program through the State Fire Marshal's Office under T.C.A. 68-120-101(b). In covered cities and counties, a state permit must be secured before construction starts on a one or two family home, a townhouse, or an addition of 30 or more square feet of interior space, and anyone who begins work first owes an additional fee equal to 100 percent of the required permit fee for each violation, on a permit fee scale that runs from $100 to $550 and up depending on construction cost.
Penalties, the as-built path, and what the statute actually says
What you can build without a permit in Tennessee
3 of the 25 answered rules across Tennessee need no permit at all and 6 turn on a size or scope condition the jurisdiction publishes, by project and jurisdiction, in each office's own words.
What a permit costs in Tennessee
There is no single Tennessee permit fee. Each jurisdiction in Tennessee sets and publishes its own, and they do not use the same pricing model, so the figure that applies to your project is the one your own city or county publishes. Below is every Tennessee project where we have quoted one, verbatim, from the office's own schedule.
| Project in Tennessee | Jurisdictions publishing a fee |
|---|---|
| Deck | 3 |
| Electrical | 3 |
| HVAC | 3 |
| Plumbing | 3 |
| Pool | 3 |
| Shed | 3 |
| Solar | 3 |
Each row links to the Tennessee table carrying every quoted fee, its source and its verification date. We do not publish a Tennessee average: the notes mix flat minimums, valuation percentages and per-fixture charges, so an average would be a number no office charges.
Building code in Tennessee
Tennessee adopted International Residential Code (statewide minimum). Based on the International Residential Code (IRC) adopted by the state.
Administered by Tennessee Department of Commerce and Insurance, State Fire Marshal's Office. Official source
Some counties exempt themselves from the state residential code. Confirm with the local jurisdiction.
Most local permit thresholds derive from this code. See our sources and standards.
What each Tennessee jurisdiction publishes
One line per jurisdiction, written from its own rules rather than from a state summary. This is the section that used to be a list of links, and the states with the fewest jurisdictions to compare are the ones it says the most about.
- Memphis 10 rules
5 of 9 projects always need a permit and 4 turn on the size or scope of the work. The ones that depend on the project are deck, plumbing, pool and roof replacement. Published thresholds include deck at 200 sq ft and pool at 24 inches. 1 question is unresolved because the jurisdiction publishes no answer.
- Nashville 10 rules
8 of 10 projects need a permit, and 2 do not. The ones that depend on the project are shed. No permit at all for fence and roof replacement. Published thresholds include shed at 100 sq ft.
- Williamson County 10 rules
5 of 6 projects need a permit, and 1 does not. The ones that depend on the project are pool. No permit at all for roof replacement. Published thresholds include pool at 30 inches. 4 questions are unresolved because the jurisdiction publishes no answer.