Auburn, AL Accessory Structures: Garage Conversions (2026)

The City of Auburn does not have a stand-alone garage-conversion ordinance. Instead, two existing frameworks apply. First, any conversion of a garage into habitable space is a building alteration governed by the codes Auburn adopted effective January 1, 2022, including the 2021 International Residential Code (with Alabama amendments) and the 2021 International Building Code, enforced by Inspection Services. That means the new living area must meet code requirements for egress, light and ventilation, ceiling height, smoke and carbon-monoxide alarms, and energy standards, and a building permit is required. Second, if the converted space becomes a separate dwelling unit with its own kitchen and bath, the Zoning Ordinance's Accessory Dwelling Unit standards apply: it must be on an owner-occupied single-family lot, may not exceed the lower of 30 percent of the principal home's floor area or 1,000 square feet, is limited to one per lot, must remain owner-occupied, and may not be rented or used as income property. A zoning certificate is required under Section 511.02 before establishing the use. Note that the Section 511.04 home-occupation rules exclude garages from countable 'total floor area,' so converting a garage does not, by itself, authorize a larger home business. Owners should confirm specifics with Auburn Development Services before starting work.