Lot coverage in Suffolk County typically limited to 20-35% of lot area depending on town and zoning district. Gross floor area (GFA) limits also apply in East End towns to prevent McMansions.
Town of Brookhaven A Residential allows 25% lot coverage by buildings. Town of Islip Residence B allows up to 30% coverage. Town of Huntington R-10 allows 25% coverage. Town of Southampton applies a Gross Floor Area (GFA) formula: 10% of lot area plus 1,600 sq ft, capped at 12,000 sq ft. Town of East Hampton 255-11-11 applies a similar GFA schedule tied to lot size. Lot coverage typically excludes pervious patios and walks under 2 feet, but includes decks, pools, and accessory structures in most towns.
Exceeding coverage requires ZBA variance. Violations result in stop-work orders, denial of CO, and fines $250-$1,000 per day.
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See how Suffolk County's lot coverage limits rules stack up against other locations.
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