Harrison County zoning and Gulfport/Biloxi codes mandate setbacks varying by district. FEMA VE (Coastal High Hazard) zones along US-90 add elevation requirements. Dillon's Rule state, so all setbacks trace to state zoning enabling act.
Harrison County zoning ordinance establishes minimum setback distances by district. Typical residential (R-1, R-2) setbacks are 25 feet front, 10 feet side, 20 feet rear. Gulfport LDO requires 20-25 ft front, 7.5-10 ft side, 20 ft rear in most residential zones. Biloxi zoning includes a special Coastal Overlay District along US-90 Beach Boulevard with stricter requirements. FEMA Flood Insurance Rate Maps designate much of south Harrison County as AE, VE (Coastal High Hazard with wave action), and X zones; VE zone structures must be elevated on open foundations with breakaway walls and meet 15+ ft BFE (Base Flood Elevation) — effectively dictating setbacks combined with elevation. Post-Katrina rebuilding under MEMA and HUD CDBG-DR grants requires compliance with 2015 IBC/IRC plus MS elevation standards. Corner lots have increased side-street setbacks. Variances require Board of Adjustment hearings.
Building within setback: stop-work order, $100 to $2,000 fines. VE zone violation: loss of federal flood insurance eligibility plus state Coastal Program action. Removal at owner expense possible.
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