Alpharetta, GA Accessory Structures: Shed & Carport Rules (2026)

The Unified Development Code lists a shed or tool room for storing household goods and yard equipment as a customary accessory use to a dwelling under Section 2.3.3.C.3 in the City of Alpharetta. That accessory-use section opens with rules common to every item on its list, including sheds: the structure must meet setback and yard requirements, cannot sit closer to the road than the principal house, and cannot exceed 20% of the size of the principal use. On top of that shared floor, the shed itself carries its own specific setback: a minimum 10 feet from the rear and side lot lines, or the same setback that applies to the principal building on that lot, whichever distance is less.

That means a homeowner whose house sits on a tighter setback than 10 feet can build the shed to match the house line rather than the flat 10-foot figure. The rule sits among several other accessory-structure standards in the same Section, including a 10-foot setback for gazebos and other free-standing structures and a 20-foot setback for pet quarters, so a shed gets a comparatively closer allowance than some of its accessory neighbors. Any shed still needs to clear the general prohibition on locating accessory structures in a required front yard, and it must comply with all otherwise-applicable Building Code requirements for a permanent structure. Community Development reviews shed placement as part of the building permit process for accessory structures.