Jackson, MS Accessory Structures: Garage Conversions (2026)

A garage conversion in Jackson triggers two parallel approvals. First, Chapter 26 of the Jackson Code of Ordinances (Buildings and Building Regulations) requires a building permit issued by the Department of Planning and Development before any structural change, change of occupancy, or new habitable space is created. Chapter 26 adopts the International Codes by reference, and the Mississippi Residential Code 2018 (which carries forward the IRC 2018) governs the technical work: minimum ceiling heights, light and ventilation, egress windows for sleeping rooms, smoke and carbon monoxide alarms, energy code envelope upgrades, and electrical and mechanical work. Plans typically must show insulation, framing, electrical, HVAC, and any new openings. Second, the City of Jackson Zoning Ordinance (adopted September 20, 2018) governs whether the converted space is a permitted use. Converting a garage into a separate dwelling unit (a second household) is only allowed where the zoning district permits two units; converting it into additional living area for the existing household (extra bedroom, family room, home office) is generally treated as an addition to the principal dwelling and must satisfy setback, lot-coverage, height, and off-street parking standards. Removing required parking spaces by enclosing the garage may force the owner to add replacement off-street spaces. Mississippi's authority for this regulation comes from Miss. Code Ann. Sec. 17-1-1 et seq. (state zoning enabling act) and Sec. 21-17-1 (municipal home rule).