ADU Rules in Vicksburg, Mississippi

Vicksburg is the Warren County seat with a population of approximately 22,000, located at the confluence of the Yazoo River and the Mississippi River. Famous for the Vicksburg National Military Park commemorating the 47-day Civil War siege of 1863, the city is protected from flooding by a major flood wall and levee system managed in partnership with the U.S. Army Corps of Engineers. Mississippi has no statewide ADU law — all accessory dwelling unit rules are set by Vicksburg's local zoning ordinance.

Mississippi Statewide ADU Law

Mississippi has not enacted statewide ADU legislation. There is no state mandate requiring cities to permit ADUs or streamline approvals. Vicksburg's local zoning ordinance governs whether an ADU is permitted on your property, what size it can be, and what flood, historic, and levee-related standards apply.

Permitted ADU Types

Availability varies by zoning district — verify with the Planning & Community Development department:

• Detached ADU: A separate structure on the same lot as the primary dwelling
• Attached ADU: An addition to the primary home with its own entrance and living facilities
• Garage Conversion: Converting an existing detached garage to a dwelling unit
• Basement/Interior Conversion: Converting interior space to a separate dwelling unit

Zoning Districts and Eligibility

Vicksburg's zoning code governs land use across the city. Contact the Planning & Community Development department to confirm:

• Which zoning district your property falls in
• Whether ADUs are permitted by-right or require a conditional use permit
• Minimum lot size for ADU eligibility

Size Limits

Contact the Vicksburg Planning & Community Development department for current ADU size standards applicable to your district and lot. Confirm maximum square footage or percentage-of-primary-dwelling limitations.

Setbacks

Vicksburg's setback requirements vary by zoning district. General residential standards in comparable Mississippi cities include:

• Front setback: 25–30 feet minimum
• Side setback: 5–8 feet minimum
• Rear setback: 20–25 feet minimum

Accessory structures are commonly permitted with reduced rear and side setbacks. Confirm current standards with the Planning & Community Development department.

Height Limits

• Primary residential structures: Typically 35 feet maximum in standard residential zones
• Accessory structures: Typically limited to 25 feet or the height of the primary structure, whichever is less
• Confirm current standards with the Planning & Community Development department

Flood Zones: Yazoo and Mississippi River Confluence — Critical Considerations

Vicksburg's location at the confluence of two major rivers makes flood zone status one of the most important factors in any development project.

Flood Wall and Levee System

Vicksburg is protected by a major flood wall and levee system. Key factors:

• Determine whether your property is inside or outside the flood wall/levee protection: This is the most critical threshold. Properties outside flood wall protection face dramatically different risk and construction requirements
• Levee certification: FEMA flood map designations depend on whether the levee system is currently certified. Confirm current certification status with the Army Corps of Engineers and the Planning Department
• Residual risk: Even within the flood wall, interior drainage and rainfall can cause flooding. The flood wall does not protect against all flood events

FEMA Flood Zone Status

Check your property at the FEMA Flood Map Service Center:

• Inside flood wall, X zone: Reduced flood risk; standard construction typically acceptable
• AE zones: Detailed Base Flood Elevation — must elevate to or above BFE for new construction
• Areas outside flood protection: May be in high-hazard A or AE zones with strict elevation requirements

Construction in Flood Zones

If your property is in a FEMA-designated flood zone:

• An Elevation Certificate may be required before permitting
• New construction must meet or exceed the Base Flood Elevation
• Substantial improvement rule: If your ADU project costs 50% or more of the structure's market value, full flood compliance applies to the entire structure

Historic Districts

Vicksburg has a rich stock of historic residential and commercial architecture. Historic overlay zones exist near the National Military Park and in older neighborhoods. Properties within these zones may require:

• Historic Preservation Commission review before exterior modifications or new construction
• Compatibility of design with the historic character of the neighborhood
• Use of appropriate materials and architectural details

Contact the Planning & Community Development department to determine if your property is within a historic district.

Vicksburg National Military Park

The park is managed by the National Park Service. Properties adjacent to or near park boundaries may have additional considerations:

• View corridors from within the park may be subject to local design guidelines
• NPS may comment on development proposals that could affect the park's visual setting
• Contact the Planning Department to discuss any concerns about NPS adjacency before beginning your project

Parking

Contact the Vicksburg Planning & Community Development department for ADU parking requirements in your zone.

Owner-Occupancy

Vicksburg may require owner-occupancy of the primary dwelling or the ADU. Confirm current requirements with the Planning & Community Development department.

Permit Process

1. Flood zone and levee check: Determine if your property is inside or outside flood wall protection; check FEMA flood zone at Flood Map Service Center
2. Verify zoning: Contact Planning & Community Development to confirm your district and ADU eligibility
3. Historic district check: Determine if your property is in a historic overlay zone requiring design review
4. NPS adjacency: If near the National Military Park, discuss any NPS concerns with the Planning Department
5. Elevation certificate: Obtain or locate any existing elevation certificate for flood zone properties
6. Site plan: Prepare a site plan showing the ADU location, setbacks, and dimensions
7. Building permit application: Submit construction documents to the Planning/Building Department
8. Inspections: Schedule required inspections during construction
9. Certificate of Occupancy: Required before occupying the ADU

Contact

City of Vicksburg Planning & Community Development 1401 Walnut Street, Vicksburg, MS 39183 Website: vicksburg.org/departments/planning

Municipal Code: library.municode.com/ms/vicksburg

Disclaimer: Mississippi has no statewide ADU law. This guide provides general information about ADU rules in Vicksburg and should not be relied upon as legal or regulatory advice. The Yazoo-Mississippi River confluence creates critical flood zone considerations — always verify current flood zone designations, levee and flood wall protection status, and historic district requirements with the City of Vicksburg Planning & Community Development department and the U.S. Army Corps of Engineers before making any development decisions.