DeSoto County

Permits for ADUs on parcels in unincorporated DeSoto County are issued by the DeSoto County Building Department with zoning-compliance review from the Planning Department. Arcadia is the only incorporated municipality; the remainder of the county is unincorporated. Septic-system permitting for rural parcels is handled through the Florida Department of Health, DeSoto County office.

Process overview: An ADU on an unincorporated DeSoto parcel is permitted as a building permit with zoning-compliance review. Typical workflow: zoning-compliance check (agricultural and rural-residential districts are generally permissive), septic permit (if needed) through FDOH, construction-drawing submission under Florida Building Code 2023, plan review, wind-load review (DeSoto sits in approximately the 140 mph ASCE 7-22 ultimate design wind-speed zone for its inland location, higher than comparable panhandle inland counties because of central-Florida hurricane exposure), issuance, inspections, and certificate of occupancy. Peace River floodplain parcels require elevation-certificate review.

Impact fees: DeSoto County levies modest impact fees. Transportation and schools fees are assessed on new residential units. ADU additions in unity-of-title configurations typically receive reduced rates or are exempt from certain categories. (schedule)

The DeSoto County Property Appraiser maintains parcel-level assessment records for all real property in DeSoto County. ADU additions are assessed at just value on completion; Florida's Save Our Homes 3% cap applies to homesteaded primary residences. Agricultural-classification (greenbelt) parcels are assessed at agricultural use-value rather than market value, but an ADU addition may prompt a partial reclassification of the homesite portion.

Assessment policy: ADU additions assessed at just value on completion; homesteaded host portion continues under Save Our Homes cap. Agricultural-classification parcels: only the homesite portion is affected by an ADU addition; surrounding agricultural land retains greenbelt valuation. No county-level ADU abatement or incentive.

DeSoto County administers a modest overlay portfolio appropriate to its inland rural location. The Peace River corridor bisects the county and creates extensive floodplain territory; South Florida Water Management District jurisdiction covers the entire county. Agricultural-use overlays and wildlife-habitat overlays (for gopher tortoise, crested caracara) affect some rural parcels.

• FEMA Special Flood Hazard Areas (SFHA) — DeSoto participates in NFIP. Parcels along the Peace River (which bisects the county north to south) and tributary corridors face Zone A or AE designations. Hurricane Ian (2022) produced catastrophic Peace River flooding that informed post-event map updates; much of Arcadia flooded. ADU construction in a mapped floodplain requires elevation-certificate review and can require substantial elevation.
• South Florida Water Management District Environmental Resource Permits — DeSoto sits within SFWMD jurisdiction. ADU site work affecting wetlands, adding impervious surface thresholds, or altering stormwater flow requires an ERP.
• Hurricane Wind Zone — approximately 140 mph ultimate design wind speed — DeSoto's inland-south location still places it in approximately the 140 mph ASCE 7-22 ultimate design wind-speed zone — central Florida's hurricane exposure (including Charley 2004 and Ian 2022) keeps inland wind loads high. Hurricane clips, roof-deck attachment schedules, and impact-rated openings or shutters are required.
• Florida Scrub-Jay, Gopher Tortoise, and Crested Caracara Habitat — Rural DeSoto contains mapped habitat for several listed species. Gopher tortoise is commonly encountered on sandy-upland parcels and requires FWC permitting for relocation if disturbed by construction. ADU site clearing on mapped habitat may trigger survey and relocation costs.