Building permits, zoning and land rules in DeSoto County, Mississippi

In unincorporated DeSoto County, the Building Occupancy Checklist requires a building permit before any building change begins¹. We could not confirm the full new-construction rule or exemptions; describe the project to Planning & Building². Inside Southaven, the city handles building permits for renovations, alterations, additions and listed accessory structures; MSDH remains the septic authority^5,8. DeSoto County lists footing, slab, framing, plumbing rough-in, sewer and final inspections, and operates under the 2017 electrical code and 2018 international construction codes^4,13. Mississippi's own-residence licensing exemption does not waive local building permits or inspections¹². Owner-supervised construction for the owner's use has sale, rental and public-use restrictions; more than 1 single-residence permit application or constructed residence within a year creates a rebuttable presumption of intent to sell, lease or rent¹².

DeSoto County Planning & Building processes building permits and inspections for unincorporated county projects². Reach the office at 365 Losher Street, Suite 200, Hernando, MS 38632, or call 662-469-8023². Planning staff evaluate rezonings and review subdivisions and site plans, while building staff process building permits, inspect construction and maintain county contractor licensing². DeSoto County’s Citizen Self Service Portal accepts documents and lets applicants track activity; electrical, mechanical and plumbing applications can also be mailed with the appropriate fee or delivered to the office for payment, and staff review every application before issuance¹¹. Ask the office which forms, plans, inspections and fee apply to the exact scope before work begins^1,14.

DeSoto County maintains zoning and an adopted district map for its unincorporated planning jurisdiction, with subdivision and site-plan review^3,7. Inside Southaven, Olive Branch and Horn Lake, city zoning applies; MSDH remains responsible for onsite wastewater systems^8,15,16,17. DeSoto County's A Agricultural District requires cannabis cultivation and processing facilities to have at least 3 acres and a 100-foot side-property-line setback; those use-specific standards do not establish the dimensions for an ordinary home¹⁸. We could not confirm general residential setbacks, lot area, minimum dwelling size, lot coverage, height limits or an agricultural-building exemption; ask Planning & Building for the parcel's district standards and proposed-use requirements².

The Mississippi State Department of Health requires a permit to install an onsite wastewater system in DeSoto County where no sewer option is available⁶. For a new DeSoto County onsite wastewater system, file MSDH’s complete online application, then pay through the online payment link, which adds a small processing fee⁸. The local MSDH office has closed, so call the Wastewater Call Center at 855-220-0192 for permit or inspection requests and inspector dispatch². For a new individual system, the certified installer must contact MSDH 24 hours before construction to schedule the inspection¹⁹. A soil and site evaluation produces the permit or recommendation needed to obtain a water meter⁸. In a subdivision, individual septic is allowed only where central sewage is unavailable and written health approval is obtained²⁰. Only about 8.6% of county soils rate free of severe limits for a conventional drain field, so evaluate the site before fixing a house location or budget²¹.

We could not confirm a DeSoto County rule that answers long-term RV living, temporary camping or tiny-home occupancy on private land. Unincorporated parcels remain subject to county zoning, subdivision and site-plan review where applicable³. Before buying or placing a unit, ask Planning & Building whether the parcel's district permits the proposed use, whether a tiny home is treated as a dwelling or another structure, and what foundation, utility and occupancy approvals apply². A change to an existing building requires a permit before work starts¹. Where no sewer option is available, installing an onsite wastewater system requires an MSDH permit; subdivision septic also requires written health approval^6,20. A manufactured home sited anywhere in Mississippi on or after July 1, 2009 must pass a State Fire Marshal's Office installation inspection before anyone occupies it, and all state or local permits must be obtained before installation²².

1. Ask Planning & Building to confirm county jurisdiction, the zoning district and any subdivision or site-plan review^2,3.
2. Confirm access before closing; private-driveway access for a subdivision lot or tract without public-road frontage needs Board of Supervisors approval before recording²⁰.
3. Where no sewer option is available, apply to MSDH for the required onsite wastewater installation permit, and obtain written health approval if a subdivision will use septic^6,20.
4. Ask MDEQ about the well: a groundwater withdrawal permit is required for wells with surface casing 6 inches or wider, with some exclusions, and a landowner may drill without a contractor license for a single-family permanent residence if construction standards are followed⁹.
5. Submit plans and permit documents through the county portal or approved mail or in-person process, then wait for staff issuance before covered work begins^1,11.
6. Schedule the building inspections assigned to the project, and have the certified septic installer give MSDH 24 hours' notice before beginning a new individual system^13,19.

Start with jurisdiction and zoning because county rules govern the unincorporated planning area, while municipal rules may apply inside city limits³. Ask whether subdivision or site-plan review affects the parcel or project³. If your driveway will meet a state highway, a state permit is required for new driveways and alterations to existing ones²³. Verify road frontage because private-driveway access for a subdivision lot or tract without public-road frontage needs Board of Supervisors approval before recording²⁰. For land in a floodplain, a subdivision containing at least 5 acres or at least 50 lots requires a flood development permit and impact statement with the application²⁰. Do not assume a well-and-septic plan will qualify: groundwater withdrawal permits apply to wells with surface casing 6 inches or wider, subject to exclusions, and subdivision septic needs written health approval where central sewage is unavailable^9,20. Only about 8.6% of county soils rate free of severe conventional-drain-field limits, making an early site evaluation useful²¹.