ADU rules in Brevard County, FL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Brevard County does not permit standalone ADUs by right. A guesthouse is allowed as living quarters in a detached accessory building for family or temporary guests, but may not have separate utility meters or be rented. Florida's new ADU mandate will require county adoption by December 2026.
Brevard County defines a guesthouse as living quarters within a detached accessory building on the same premises as the main building, used for family members or temporary guests. Guesthouses may not have separate utility meters and cannot be rented as separate dwellings. ADUs are not currently permitted by right in standard residential zones. Florida's new state law requires all municipalities to adopt ADU ordinances by December 1, 2026, allowing up to two ADUs per single-family parcel with minimum 150 square feet of living space.
Unpermitted ADU: standard building code enforcement. May require demolition or legalization. Occupying unpermitted dwelling: code violation.
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See how Brevard County's adu rules rules stack up against other locations.
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