Southaven, MS Accessory Structures: ADU Rules (2026)

Southaven, Mississippi addresses accessory dwelling units indirectly through Title XIII (Zoning Regulations), Chapter 13 - Storage and Accessory Buildings, of the Code of Ordinances. Section 13-13 sets the dimensional and use limits for detached accessory structures in residential districts. Subsection 13-13(d) addresses 'Use for dwelling purposes' and provides that storage or temporary buildings may not be used for dwelling purposes, which has the practical effect of prohibiting freestanding accessory dwelling units in conventional residential zones unless authorized through a separate process. Subsection 13-13(e) ('Storage/accessory building yard requirements') sets the area and setback rules: an accessory building may not exceed 50 percent of the heated square footage of the principal structure, may not occupy more than 30 percent of the rear yard, is limited to one story and 20 feet in height measured from slab to the highest point of the roof pitch, may be erected within 5 feet of a side or rear lot line provided it is located at least 10 feet from the principal building, and is prohibited in front yards. The Building Department FAQ confirms that accessory permits require a miscellaneous building permit application, certificate of compliance, and a placement diagram showing setbacks and easements. Mississippi has no statewide ADU mandate, leaving zoning authority with municipalities under Miss. Code Ann. Title 17 (Local Government) and the city's police power. Property owners interested in attached or internal accessory units (e.g., basement or above-garage apartments) should consult the Planning Department at (662) 393-6939 because the Code of Ordinances treats those as part of the principal residential structure rather than as standalone accessory buildings.