ADU rules in Hernando County, FL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Hernando County allows accessory dwelling units in limited residential zoning districts through its Land Development Code, with size caps, extra parking, and setbacks. Florida sets no statewide ADU mandate.
Florida has no statewide ADU mandate, so Hernando County controls accessory dwellings through its zoning and Land Development Code. Where allowed, an ADU must stay clearly secondary to the main house, meet accessory-structure setbacks, connect to approved water and sewer or septic, and provide additional parking. The unit must meet Florida Building Code wind loads for this Gulf-exposed county. Spring Hill deed restrictions and HOA covenants can bar a second dwelling even where county zoning would permit one, so owners should check their plat restrictions before designing an addition.
An unpermitted ADU brings building-code enforcement and a retroactive permit or removal order. Occupying an uninspected dwelling without a certificate of occupancy is a code violation with daily fines.
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See how Hernando County's adu rules rules stack up against other locations.
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