Hernando County's zoning regulations limit how much of a lot can be covered by buildings and impervious surfaces. On low-lying and coastal lots, Southwest Florida Water Management District stormwater rules add further limits.
Appendix A (Zoning) sets a maximum lot-coverage or impervious-surface ratio that varies by zoning district, counting the house, garage, driveway, patios, and other hard surfaces. In this low-lying county, coverage limits work alongside stormwater and drainage requirements enforced with the Southwest Florida Water Management District (SWFWMD) to curb runoff and flooding, especially near the coast, the Weeki Wachee River, and Spring Hill's canal network. Heavily paved lots may need engineered retention or permeable materials, which some reviews credit partially. Exceeding the ratio requires a variance.
Going over the lot-coverage limit lets the county withhold permits and require you to remove impervious surface. Uncredited paving can also fail stormwater review and hold up a certificate of occupancy.
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See how Spring Hill's lot coverage limits rules stack up against other locations.
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