Collierville, TN Accessory Structures: Shed & Carport Rules (2026)

Collierville Code of Ordinances § 151.025(D)(1) covers any building, such as a detached garage or storage shed, accessory to a single family detached, two family (duplex) or mobile home use.

Number: on residential lots less than two acres, a maximum of two accessory structures per lot. Children's play structures, animal shelters, open-air arbors, concrete slabs, swimming pools, below-grade structures and anything with a height less than 18 inches do not count toward the maximum.

Location: no accessory structure in a required front yard or between the principal building and a street, except on reversed frontage lots, where a 20-foot minimum setback from the right-of-way of the non-accessible street applies. None in a required side yard, except on a corner lot. In conventional zoning districts the setback from a property line is equal to or greater than the structure's height, or the required yard setback for the principal structure, whichever is less, and never closer than five feet to a property line or other building. In traditional zoning districts the minimum is five feet from all lot lines and from other structures, except fences, walls and open-air arbors.

Height: 14 feet or one story, except on lots of record of one acre or more and in traditional districts, where the limit is 25 feet or two stories. No accessory structure exceeds the height of the principal structure.

Size: on lots under two acres, the combined gross floor area of all accessory structures is no more than 30% of the gross floor area of the principal building.

Permit and appearance: a building permit is not issued until the Development Director or designee determines the structure is consistent with the character of development in the immediate vicinity and will not adversely affect a known archaeological, environmental, historical or cultural resource. For single-family lots, a structure over 150 square feet in gross floor area must match the principal building in architectural style, roof style and building materials, and metal and plastic are prohibited as primary siding on those structures unless that is the primary material on the house. Section 151.025(C) adds that accessory structures cannot sit in platted or recorded easements or over underground utilities and cannot be built before the principal structure.