Tennessee building codes are set by the State Fire Marshal and apply as minimum statewide standards everywhere the state has not handed enforcement to a local government. The current rules, in effect since April 17, 2025, adopt the 2021 editions of most International Code Council publications, with the International Residential Code at the 2018 edition.1Tennessee Secretary of State. Rules of the Tennessee Department of Commerce and Insurance, Division of Fire Prevention, Rule 0780-02-02 More than 40 cities and several counties run their own code programs instead, so the first question on any project is which authority you answer to.
Which Codes Apply
Rule 0780-02-02 adopts the following minimum standards for construction across Tennessee:1Tennessee Secretary of State. Rules of the Tennessee Department of Commerce and Insurance, Division of Fire Prevention, Rule 0780-02-02
- International Building Code (IBC), 2021 edition — commercial and multi-family buildings
- International Residential Code (IRC), 2018 edition — one- and two-family dwellings and townhouses
- International Plumbing Code, 2021
- International Mechanical Code, 2021
- International Fuel Gas Code, 2021
- International Fire Code, 2021
- International Energy Conservation Code, 2021 (most occupancies)
- International Existing Building Code, 2021
- International Property Maintenance Code, 2021
- NFPA 101 Life Safety Code, 2021
The residential code is one cycle behind the commercial codes. That gap matters on mixed-use work and residential-to-commercial conversions, because different editions govern different portions of the same project.
Exempt jurisdictions must adopt these same ICC codes at a minimum, but can go stricter. One useful example: the statewide standards prohibit mandatory residential sprinklers in one- and two-family dwellings, but a local government is free to require them anyway.2Justia. Tennessee Code 68-120-101 – Statewide Building Construction Safety Standards – Promulgation – Applicability
Who Issues Your Permit
Tennessee Code Annotated § 68-120-101 gives the State Fire Marshal the authority to adopt and enforce the statewide standards.2Justia. Tennessee Code 68-120-101 – Statewide Building Construction Safety Standards – Promulgation – Applicability The Fire Marshal’s Office, housed in the Tennessee Department of Commerce and Insurance, handles plan reviews, permits, and inspections wherever a local government has not stepped in.
A city or county becomes an “exempt jurisdiction” by certifying to the Fire Marshal that it has adopted the required ICC codes, employs qualified inspectors, and is actively enforcing the rules. Exempt jurisdictions issue their own permits and conduct their own inspections. As of 2025 the list includes Nashville/Davidson County, Memphis, Knoxville, Chattanooga, Murfreesboro, and more than 40 others.3Tennessee Department of Commerce & Insurance. Exempt Jurisdictions for Commercial Buildings A city can be exempt for only certain building types; where it has not adopted codes, the Fire Marshal fills in.
Exempt status is not permanent. If a jurisdiction’s code editions fall more than seven years behind the current publication, or the Fire Marshal finds after a hearing that enforcement is inadequate, the state codes take back over.2Justia. Tennessee Code 68-120-101 – Statewide Building Construction Safety Standards – Promulgation – Applicability Before you start anything, confirm whether your address falls under state or local enforcement. If it is a listed exempt city, your city’s building department is the only office you need to call.
What the State Codes Don’t Cover
Section 68-120-101(c) carves out two categories from the statewide minimum standards:2Justia. Tennessee Code 68-120-101 – Statewide Building Construction Safety Standards – Promulgation – Applicability
- Renovations of existing one- and two-family dwellings. New construction of such a home is covered; remodeling an existing one is not, at the state level.
- Nonresidential farm buildings, meaning barns, equipment sheds, and other agricultural structures no one lives in.
These exemptions only lift the state’s minimum standards. An exempt city or county can still require permits and inspections for the same work under its locally adopted codes, so verify with the local building department even when the project looks exempt on paper.
When a Permit Is Required
In state-enforced areas, a permit is required for new construction, additions that expand a building’s footprint, and structural changes such as moving load-bearing walls or altering a roofline. Significant mechanical, electrical, or plumbing work also triggers a permit, including rerouting ductwork or water lines and replacing electrical panels.
Minor cosmetic work usually does not need a permit. Painting, flooring replacement, and cabinet swaps generally fall below the threshold. The line between cosmetic and structural is not always clean, and exempt jurisdictions may draw it differently, so a short call to the issuing office saves trouble later.
Contractor Licensing
Tennessee requires a state contractor license for any construction project with a total cost of $25,000 or more. The threshold applies to the overall project value, not individual trade contracts, and covers anyone who supervises or takes charge of the work. Electrical, mechanical, plumbing, and roofing subcontractors need licenses once their portion hits $25,000. Masonry contractors have a separate $100,000 threshold for the masonry portion.4Justia. Tennessee Code 62-6-102 – Chapter Definitions
The State Board for Licensing Contractors oversees the system and issues classifications. Residential contractors are limited to one- through four-family dwellings up to three stories; commercial building contractors can work on structures intended for public use. Each license also carries a monetary limit capping project value. Taking on work above that limit violates T.C.A. § 62-6-120.
Hiring someone for a project under $25,000? That contractor is not required to hold a state license. Code requirements and permit obligations still apply to the work itself, regardless of who performs it.
Applying and Paying Fees
A permit application to the State Fire Marshal needs detailed architectural plans, a site plan, and information about the building’s intended use. The forms ask for occupancy classification and construction type based on materials. Both fields drive which code provisions and fire-resistance ratings apply, so get them right. Contractors supply a state license number for verification. Tennessee law also requires employers of construction services providers to carry workers’ compensation insurance and produce proof on request.5Justia. Tennessee Code 50-6-405 – Compensation Insurance or Proof of Financial Ability Required
State-handled permits move through the Comprehensive Online Regulatory and Enforcement (CORE) system. First-time users register, then submit applications, upload plans, pay fees, and track reviews in the same portal.6Tennessee Department of Commerce & Insurance. Comprehensive Online Regulatory and Enforcement System Projects in exempt jurisdictions use that locality’s own system.
Residential permit fees under the Fire Marshal’s schedule are based on total construction cost. They start at $100 for projects up to $5,000 and reach $350 for projects between $5,001 and $100,000, climbing $50 for each additional $50,000 of construction value. A $500,000 home carries a $750 base fee. Projects over $1.5 million add $50 for every additional $50,000 or fraction thereof. Add $100 if plumbing and HVAC inspections are required, and another $100 for a slab foundation other than a monolithic pour. The state sets a minimum construction valuation of $60.57 per heated square foot, which prevents understating cost to shrink the fee.7Tennessee Department of Commerce & Insurance. Residential Building Permit Fees Exempt jurisdictions set their own fees, which often differ.
Inspections at Each Stage
Once a permit issues, work has to pass inspection at specific milestones before moving on.
- Footing and foundation, after trenches are excavated and steel is placed but before concrete.
- Framing, after walls, roof structure, bracing, and exterior sheathing are up.
- Rough-in for plumbing, mechanical, and electrical, after installation but before drywall covers anything.
- Insulation, after framing is approved and insulation is in, before wallboard.
- Final, after the building is complete and ready for occupancy.
State-enforced inspections are scheduled through CORE. Exempt jurisdictions schedule through the local building department, often with 24 hours’ notice. Covering up work before it has been inspected can force you to open it back up, so stay on the schedule.
Certificate of Occupancy
No building can be legally occupied until the enforcing authority issues a certificate of occupancy. For one- and two-family dwellings under state jurisdiction where construction began after October 1, 2010, the Fire Marshal’s Division must issue the certificate before move-in. The same applies to additions of 30 square feet or more of interior space to existing dwellings where construction started after October 1, 2011.8Cornell Law Institute. Tennessee Comp. R. Regs. 0780-02-23-.09 – Certificate of Occupancy The certificate confirms compliance with the applicable building, fire, plumbing, mechanical, and energy codes.
The Division can suspend or revoke a certificate of occupancy that was issued in error or based on incorrect information.8Cornell Law Institute. Tennessee Comp. R. Regs. 0780-02-23-.09 – Certificate of Occupancy Occupying without one invites enforcement action and complicates any later sale or insurance claim.
Commercial Projects and Accessibility
Commercial buildings, public accommodations, and government facilities also have to comply with the federal 2010 ADA Standards for Accessible Design, mandatory since March 15, 2012.9U.S. Access Board. Americans with Disabilities Act ADA sits on top of the state’s adopted codes, so a commercial project must satisfy both. The 2021 IBC contains accessibility provisions that largely align with federal law; where ADA is stricter, ADA controls.
One- and two-family dwellings are generally not subject to ADA. Multi-family housing of four or more units falls under the Fair Housing Act, which requires accessible common areas and adaptable features in ground-floor units.