Alpharetta, GA Zoning Overlays & Bonuses: Downtown Design Guide (2026)

Section 2.8.7 of the Unified Development Code sets architectural style requirements for detached houses, cottage courts, and accessory carriage houses within the Downtown Overlay. All other building types in the Overlay, such as commercial and multi-family structures, must instead comply with the Downtown Alpharetta Design Guidelines amendment to the Alpharetta Design Review Ordinance and Design Guidelines, a separate adopted document referenced directly in the Code. Where Section 2.8.7 applies, covered houses must be designed in one of a defined list of historic styles, including Georgian, Federal/Adam, Greek Revival, and Neoclassical, with specific facade, window, door, and cornice elements spelled out style by style and sourced to published architectural references such as A Field Guide to American Houses.

The rule reaches demolition, moving, exterior material or color changes, and new construction visible from a street or public way, but exempts parcels zoned R-12 or R-15 inside subdivisions recorded before the ordinance's adoption. Compliance is determined by the Director of Community Development, who may grant relief from a requirement that is unique to the section and not otherwise required elsewhere in the Unified Development Ordinance, provided the relief causes no substantial detriment to the public good or the Overlay's intent. Article 2's general applicability clause also states that where its Downtown Overlay standards conflict with either the Unified Development Code or the Alpharetta Downtown Design Guidelines, the Overlay's own requirements control.