What Can You Build Without a Permit in Tennessee? (2026)
The 30-second answer for Tennessee
In Tennessee, the projects you can usually build without a building permit are a small detached shed, a short freestanding deck, a fence under the height cap, a low retaining wall, and cosmetic interior work. The exact limits Tennessee enforces are in the table below — and your city can be stricter than the state. The catch every homeowner needs to hear: even when no permit is required, the building code, zoning setbacks, and any HOA rules still apply. Permit-exempt means the paperwork is waived, not the rules.
How Tennessee sets the rules
Tennessee's statewide residential program is administered by the State Fire Marshal's Office (SFMO, Dept. of Commerce & Insurance) using the 2018 IRC with state amendments — the April 17, 2025 codes update moved other codes (IBC, IECC) to 2021 editions but kept the IRC at 2018. The SFMO program only applies where a city or county has no local codes department; jurisdictions with their own codes offices (Nashville, Memphis) enforce their own adopted codes. Counties and cities can vote by two-thirds to opt out, becoming 'non-code' areas where no residential building permit is required at all.
Permit-exempt limits in Tennessee
These are the thresholds we verified for Tennessee. Treat each one as the most you can usually do without pulling a permit — a stricter city amendment always wins.
| Project | Tennessee permit-exempt limit |
|---|---|
| Detached shed / accessory building | Where a local code is enforced, TN follows the 2018 IRC R105.2 baseline: one-story detached accessory structures 200 sq ft or less are permit-exempt. Cities deviate — Nashville/Davidson requires a permit for storage buildings/sheds 100 sq ft or larger — and 'non-code' counties require no permit at all. Permit-exempt is never zoning/setback-exempt. Verify with your local codes office. |
| Deck | Follows the 2018 IRC R105.2 where enforced: a deck is exempt only if ALL are true — 200 sq ft or less, not more than 30 in above grade, freestanding (not attached to the dwelling), and does not serve the required exit door. Attached or elevated decks need a permit. Many TN cities require a permit for any deck; verify locally. |
| Fence | Follows the 2018 IRC R105.2 where enforced: fences not over 7 ft tall do not require a building permit. This is a permit rule only — local zoning commonly caps front-yard fences lower (often around 4 ft) and rear/side fences at 6-8 ft, and corner-lot sight-triangle rules apply. Confirm height and placement with local zoning. |
| Retaining wall | Follows the 2018 IRC R105.2 where enforced: a retaining wall is permit-exempt only if it is 4 ft or less measured from the bottom of the footing to the top of the wall AND does not support a surcharge (no sloped soil, driveway, or structure loading behind it). Taller or surcharged walls require a permit and engineering. |
| Patio (on grade) | Follows the 2018 IRC R105.2 where enforced: an at-grade patio, walkway, or platform not more than 30 in above grade and not over a basement or story below is permit-exempt. Roofing it, attaching a cover, or raising it changes that. Zoning lot-coverage and setback limits still apply even when the patio itself needs no permit. |
Baseline: 2021 International Residential Code, Section R105.2. See the national project-by-project guide for how each threshold works.
Can you do the work yourself in Tennessee?
Yes. Under Tennessee’s owner-builder exemption (T.C.A. 62-6), an owner may build and permit a single residence for personal use without a contractor license — but only one such home every two years (limit waived in the most populous counties), not for resale, lease, or rent, and the owner must perform or directly supervise the work. Any hired trade whose portion is $25,000 or more must be licensed. In opt-out non-code counties a homeowner may voluntarily request an SFMO inspection to obtain a Certificate of Occupancy.
What's different about Tennessee
'Non-code' opt-out counties require no permit at all
Under T.C.A. 68-120-101, a county or city can vote by two-thirds to exempt one- and two-family dwellings from statewide standards. In these opt-out/non-code jurisdictions no residential building permit is required — common in rural Tennessee. Always confirm whether your county or city actually enforces codes before assuming a permit is (or isn’t) needed.
The State Fire Marshal issues permits where there's no local codes office
Unusually, TN's State Fire Marshal's Office (not a city hall) runs the residential permit and inspection program for new dwellings and additions over 30 sq ft in areas without a local codes department. In opt-out counties, a homeowner can still voluntarily request an SFMO inspection to earn a Certificate of Occupancy, which lenders often require.
Owner-builder license exemption is capped at one home every two years
Tennessee lets you act as your own contractor to build your own residence without a license, but only one homeowner-built home every two years (waived in the most populous counties), for personal use only — not resale, lease, or rent. Anyone you hire whose scope is $25,000 or more must be a licensed contractor.
"Permit-exempt" does not mean rule-free
I spent 25 years as a firefighter before I built PermitDeck, so let me be blunt about the part that gets people hurt. "No permit" never means "no rules." When a project is exempt in Tennessee, three things are still true — and now you are the one responsible for them, because no inspector is coming to check:
- Building code still applies. An exempt deck in Tennessee still has to meet the structural rules of IRC R507 — real footings, a proper ledger, and guards. A shed still has to carry your local snow and wind load. The code does not care whether a permit was pulled.
- Zoning and setbacks still apply. Exempt does not mean you can put it anywhere. Setbacks from property lines, easements, lot-coverage caps, and corner-lot sight lines all still bind you — and a neighbor complaint can force you to move it.
- HOA rules are separate. Your HOA architectural review is a private contract, not a government permit. You can be fully permit-exempt with your city and still be forced by your HOA to tear something out.
The big Tennessee cities
Permits are pulled locally, so your city's building department has the final word. Here are the two largest, with a link straight to their office.
Nashville
Metro Nashville/Davidson County Dept. of Codes and Building Safety enforces its own adopted codes via the ePermits portal. It requires a building permit for detached accessory structures/storage buildings 100 sq ft or larger — stricter than the IRC 200 sq ft — plus decks, porches, and pools.
Nashville building departmentMemphis
Memphis and unincorporated Shelby County are served by the joint Office of Construction Code Enforcement, which permits and inspects under the adopted IBC/IRC through the Develop901 (Accela) portal. No published size-based residential shed/deck exemption was found — confirm scope with the office before building.
Memphis building departmentTurns out you do need a permit? We'll match you with pros who pull it
If your project crosses one of these Tennesseethresholds, the cleanest path is to hire a licensed pro who pulls the permit in their own name and stands behind the inspection. Tell us the project once and we'll send it to up to three verified local pros. It's free, it's capped at three, and we never sell your information — the opposite of the lead-farm sites.
Get matched with up to 3 verified pros
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What happens if you needed a permit and skipped it
Guessing wrong on the exemption is not a small risk. The common outcomes are a stop-work order, a fine (often double the normal permit fee), and being ordered to open finished work back up for inspection or tear it out. The expensive part usually lands later: unpermitted work routinely kills a home saleat the buyer's inspection, and an insurance claim can be denied if the damage traces back to unpermitted construction. Most jurisdictions do allow a retroactive (after-the-fact) permit — it costs more, but it clears the record.
Full detail: what happens if you build without a permit and how to get a building permit.
Tennessee permit-exemption FAQs
Do I need a permit to build a shed in Tennessee?
It depends on your jurisdiction. Where the state's 2018 IRC is enforced, a detached shed 200 sq ft or less is permit-exempt. But Nashville/Davidson requires a permit at 100 sq ft, Memphis/Shelby County publishes no size exemption, and many rural non-code counties require nothing. Even when exempt, zoning setback and lot-coverage rules still apply. Verify with your local codes office.
Who issues residential building permits in Tennessee?
It varies by location. The State Fire Marshal's Office runs the statewide program (2018 IRC) for areas without a local codes department. Cities and counties with their own codes offices — like Nashville and Memphis — issue and inspect under their own adopted codes. Some counties and cities have voted to opt out entirely, so no permit is required there. Always confirm who has authority locally.
Can I build my own house in Tennessee without a contractor license?
Yes. Tennessee's owner-builder exemption lets you build and permit a single residence for your own use without a contractor license. The limits: one homeowner-built home every two years, not for resale, lease, or rent, and you must perform or directly supervise the work. Any tradesperson you hire whose portion is $25,000 or more must be licensed.
My Tennessee county says it has no building codes — is that legal?
Yes. These are opt-out or non-code jurisdictions, where a two-thirds local vote exempted one- and two-family homes from statewide standards, so no building permit is required. You can still voluntarily request a State Fire Marshal inspection to get a Certificate of Occupancy, which lenders often need. Zoning, deed restrictions, and HOA rules still apply regardless.
Sources we verified against
- TN State Fire Marshal's Office — Currently Adopted Codes (2018 IRC)
- TN SFMO — Opt-Out / Non-Code Jurisdictions (T.C.A. 68-120-101)
- TN SFMO — Residential Permit FAQs (30 sq ft trigger, owner-build)
- Metro Nashville — Residential Building Permits (100 sq ft accessory threshold)
- Memphis & Shelby County — Develop901 permitting portal
Every threshold on this page is anchored to Tennessee's building code or the sources listed above. Where a number varies by city and we could not verify it, we say "verify locally" rather than guess — a permit page you cannot trust is worse than no page at all.
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