Do I need a permit for shed or accessory structure in Knoxville?
It depends. Whether shed or accessory structure needs a permit in Knoxville comes down to the details of your project.
Knoxville generally follows the International Residential Code exemption for one-story detached accessory structures not over 200 square feet, so a small shed may not need a building permit, but larger structures, a permanent foundation, or any electrical wiring can trigger one; confirm with Knoxville Plans Review and Inspections before building. Even an exempt shed must meet zoning setbacks, and the city offers a Residential Code Compliance Certification through the permits.knoxvilletn.gov portal for projects that are exempt from a building permit such as fences and small sheds. Tennessee requires a state contractor license for residential building work above roughly 25,000 dollars, so verify licensing if a contractor builds a larger accessory structure. A shed that will have electricity, plumbing, or a permanent foundation falls outside the usual small accessory building exemption, which generally covers simple unpowered structures only. Electrical and plumbing work each normally require their own permit and inspection even when the structure itself would have been exempt, and many jurisdictions require a licensed electrician or plumber to pull them. Zoning setbacks, height limits, and lot coverage are reviewed separately from the building permit, so confirm placement with your local department before the shed is delivered or poured. Tennessee does not set one statewide shed threshold, and the 200 square foot figure from the model International Residential Code does not govern here. Who enforces residential construction depends on your address: where a city or county has neither taken on residential code enforcement itself nor opted out by a two-thirds vote of its legislative body, the State Fire Marshal's Office runs the residential permit and inspection programme using state-contracted inspectors. So the first question is not the size of the shed but which authority covers you. Confirm whether your city or county enforces its own code, has opted out, or falls under the State Fire Marshal programme, then ask that office for the size threshold. Zoning setbacks apply regardless, and a separate permit is needed for any electrical service run to the shed.
Documents you may need
- Accessory structure permit application through the City of Knoxville portal (permits.knoxvilletn.gov) for a shed, carport, pergola, patio cover, or metal building that is not exemptLikely required
- Site diagram showing the structure location and distance to property linesLikely required
- Residential Code Compliance Certification through the portal for a structure that is exempt from a building permit but still needs a zoning checkSometimes required
- Permit applicationLikely required
- Site plan showing setbacks and structure sizerequired
- Foundation/anchoring and construction details for larger structuresSometimes required
Possible inspections
- Footing or foundation inspection where a permanent foundation is used, scheduled through the City of Knoxville portal
- Final building inspection where a permit is issued
- Setback / footing inspection where a permit is issued
- Final inspection
Frequently asked questions
- Do I need a permit for shed or accessory structure in Knoxville?
- It depends. Whether shed or accessory structure needs a permit in Knoxville comes down to the details of your project. Knoxville generally follows the International Residential Code exemption for one-story detached accessory structures not over 200 square feet, so a small shed may not need a building permit, but larger structures, a permanent foundation, or any electrical wiring can trigger one; confirm with Knoxville Plans Review and Inspections before building. Even an exempt shed must meet zoning setbacks, and the city offers a Residential Code Compliance Certification through the permits.knoxvilletn.gov portal for projects that are exempt from a building permit such as fences and small sheds. Tennessee requires a state contractor license for residential building work above roughly 25,000 dollars, so verify licensing if a contractor builds a larger accessory structure. A shed that will have electricity, plumbing, or a permanent foundation falls outside the usual small accessory building exemption, which generally covers simple unpowered structures only. Electrical and plumbing work each normally require their own permit and inspection even when the structure itself would have been exempt, and many jurisdictions require a licensed electrician or plumber to pull them. Zoning setbacks, height limits, and lot coverage are reviewed separately from the building permit, so confirm placement with your local department before the shed is delivered or poured. Tennessee does not set one statewide shed threshold, and the 200 square foot figure from the model International Residential Code does not govern here. Who enforces residential construction depends on your address: where a city or county has neither taken on residential code enforcement itself nor opted out by a two-thirds vote of its legislative body, the State Fire Marshal's Office runs the residential permit and inspection programme using state-contracted inspectors. So the first question is not the size of the shed but which authority covers you. Confirm whether your city or county enforces its own code, has opted out, or falls under the State Fire Marshal programme, then ask that office for the size threshold. Zoning setbacks apply regardless, and a separate permit is needed for any electrical service run to the shed.
- Who issues the permit in Knoxville?
- The local building department for Knoxville handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.