Charlotte County, FL Accessory Structures: ADU Rules (2026)

Section 3-9-69 of the Charlotte County Code lists the 'guest home' as a conditional use, meaning it needs conditional use approval under the county's development review process rather than being permitted outright. On property zoned residential single-family (RSF) or mobile home community (MHC), a guest home is allowed only if the lot is at least twice the minimum lot area required for a single-family dwelling, the guest home and principal dwelling stay under one ownership, construction matches the appropriate zoning district's development standards, the guest home is built of the same materials and color scheme as the principal dwelling, and the county assesses impact fees on it as a full dwelling unit.

On property zoned agriculture (AG), excavation and mining (EM) or residential estate (RE), the code instead permits one accessory dwelling unit per single-family dwelling, requiring the transfer of a density unit onto the site if the base zoning does not already allow the added unit, with the same single-ownership, matching-materials and dwelling-unit impact fee conditions. Separately, within the Babcock overlay zoning district's mixed-use residential commercial subdistrict, Section 3-9-51(c)(1)b permits attached or detached accessory guest units alongside single-family homes without counting them toward the subdistrict's density cap, but requires one additional on-site or dedicated on-street parking space within 300 feet of the unit it serves.

None of these accessory units may be rented separately from the principal home, and every application goes through the zoning official's site plan or conditional use review before a building permit issues.