Jackson County, MS Building Setbacks & Zoning: Lot Coverage Limits (2026)

Jackson County Zoning Code R-1 single-family districts limit lot coverage to 35% for primary structures with 40% total impervious surface maximum including driveways, patios, and accessory buildings. R-2 duplex districts allow 40% primary and 50% impervious. C-2 commercial allows 70% impervious. Pascagoula Code §90 matches R-1 at 35% primary and allows 45% impervious given coastal drainage demands. Ocean Springs Historic District reduces coverage to 30% in the L.N. Dantzler District to preserve oak canopy. Moss Point R-1 is 40% primary. Gautier R-1 sets 35% with 50% total impervious. Mississippi Department of Environmental Quality (MDEQ) under Miss. Code §49-17 and the MS Stormwater Pollution Prevention Plan (SWPPP) program requires stormwater management for disturbance over 1 acre through NPDES General Construction Permit. Coastal zone stormwater BMPs include bioswales, rain gardens, and detention ponds. Permeable pavers receive partial coverage credit at 50% under most Jackson County codes. After Katrina flooding revealed drainage deficits, Pascagoula and Ocean Springs added tighter coverage rules for redevelopment. FEMA Community Rating System (CRS) credits reduced coverage and open space preservation, lowering flood insurance premiums by 5-25% for residents of compliant communities.