Shed permit rules in Knox County, TN — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
In unincorporated Knox County, accessory buildings including sheds cannot exceed 18 feet in height, must sit at least 5 feet from a rear lot line, and cannot extend into the front yard. One-story detached accessory structures under 120 square feet are exempt from a building permit but still must meet
The Knox County Zoning Ordinance treats a shed as an accessory building. Height is capped at 18 feet (roof pitch may match the main house). An unattached accessory building must keep an 8-foot side yard, though a one-story accessory building may set back only 5 feet from an interior side line when it sits more than 90 feet behind the front property line, and no closer than 5 feet to a rear lot line. Main and accessory buildings together may cover no more than 30% of the lot. A one-story detached structure under 120 sq ft needs no building permit but must still meet zoning; larger sheds, or any with electrical or a permanent foundation, require a county residential building
Zoning and permit violations are enforced by the county Department of Code Administration; work may be stopped and correction or removal ordered.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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