ADU rules in Olive Branch, MS — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Olive Branch regulates accessory structures and dwelling units through Appendix A - Zoning Ordinance, Article VII (Accessory Buildings and Uses). True accessory dwelling units (ADUs) are listed as a permitted use only in the C-1 Neighborhood Commercial District (Sec. 8.A.1); residential AR, R-1, R-2, R-3, and R-4 districts permit accessory buildings (detached garages, pool houses, gazebos, sheds) but not full secondary dwelling units. State authority: Miss. Code Ann. §17-1-3 et seq. (municipal zoning).
Olive Branch's zoning code is codified as Appendix A to the Code of Ordinances. Article VII governs accessory buildings and uses, and is referenced from each district's permitted-use list with the phrase 'Accessory buildings and uses as provided in Article VII.' True accessory dwelling units (a separate, full living quarters with kitchen and bath) are listed as a permitted use only in the C-1 Neighborhood Commercial District at Section 8.A.1. The residential districts (AR Agricultural-Residential, R-1, R-2, R-3, R-4) permit accessory buildings - storage buildings, detached garages, pergolas, gazebos, and pool houses - but not free-standing second dwellings. Home occupations are allowed under Section 1.A.10 of the Agricultural District but require: occupants who are members of the family residing on the premises, use that is clearly incidental and subordinate to residential use, occupation of no more than 25 percent of the floor area of the dwelling unit, and no change in the outside appearance of the building. Building permits for accessory structures are issued by the Olive Branch Building Department (662-892-9333) under the city's adopted 2018 International Building Code and 2018 International Residential Code; site plans are required with each Accessory Building Permit application. Mississippi has no statewide ADU mandate or preemption; municipal zoning authority flows from Miss. Code Ann. Title 17. Planning and Development is at 9200 Pigeon Roost Road; Director Venard Asongayi (662-892-9339).
Building an unpermitted accessory structure or operating a second dwelling unit in a district where ADUs are not permitted can trigger stop-work orders, denial of certificate of occupancy, code-enforcement citations, and required corrective work or removal. Home occupations exceeding the 25 percent floor-area cap or employing non-resident workers may be ordered to cease.
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