Hillsborough County lot coverage limits: RSC-6 allows 45% maximum impervious coverage, RSC-4 allows 40%, RSC-2 allows 35%. Additional stormwater requirements in Coastal High Hazard Area and SWFWMD regulated watersheds.
Lot coverage calculated as total impervious surface (buildings, driveways, pools, patios) divided by lot area. Hillsborough LDC §6.01 sets maximums by zoning district. Stricter limits apply in the Coastal High Hazard Area along Tampa Bay, Hillsborough Bay, and Old Tampa Bay due to storm surge and flooding concerns. Southwest Florida Water Management District (SWFWMD) requires stormwater retention for new impervious surface over 4,000 sq ft or in ERP-regulated watersheds. Pervious pavers, gravel, and approved porous concrete do not count toward impervious coverage.
Exceeding lot coverage: building permit denial, removal required, or formal variance. Stormwater violation: SWFWMD fines up to 10,000 dollars per day.
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See how Hillsborough County's lot coverage limits rules stack up against other locations.
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