Fort Myers, FL Environmental Rules: Flood Zones (2026)

Chapter 110 of the Fort Myers Code of Ordinances (Floodplain Protection) governs all development inside the FEMA Special Flood Hazard Area (SFHA) within city limits. The regulated area is mapped on the current effective Lee County Flood Insurance Rate Map (FIRM) — the most recent countywide revision was made effective November 17, 2022 (post-Ian update) — and includes 1% annual chance (100-year) AE zones along the Caloosahatchee River and inland tributaries, plus coastal high-hazard VE zones in limited downriver areas where wave action is mapped. Any 'development' as defined by NFIP (any man-made change including buildings, grading, paving, dredging, drilling, mining, filling, or storage of materials) inside the SFHA requires a Floodplain Development Permit issued by the city Floodplain Administrator before work begins. The lowest floor (including basement) of a new building, or of a substantially improved/substantially damaged existing building, must be elevated at or above BFE + 1 foot of freeboard, per Section 1612 of the 8th Edition (2023) Florida Building Code and Chapter 110. In VE zones the lowest horizontal structural member must be at or above BFE + 1', with breakaway walls below and no obstructions to wave action. Substantial improvement is the trigger for full code compliance: under NFIP and Chapter 110, any combination of repair, reconstruction, rehabilitation, addition, or improvement whose cost equals or exceeds 50% of the building's pre-damage/pre-improvement market value (the FEMA 'Substantial Improvement / Substantial Damage' or '50% Rule') brings the entire building into compliance with current floodplain construction standards. After Hurricane Ian, the U.S. Army Corps of Engineers performed substantial-damage assessments for Lee County structures, and many pre-FIRM homes were determined to be substantially damaged — triggering mandatory elevation to BFE + 1' before reconstruction. Fort Myers participates in FEMA's CRS, which reduces flood insurance premiums for policyholders citywide based on the city's floodplain management activities; Fort Myers and Sanibel were two of the few Lee County NFIP communities that retained CRS standing after Ian. Property-specific zone and BFE: use the FEMA Flood Map Service Center (msc.fema.gov) or contact Floodplain Coordinator Robert Ward at rward@fortmyers.gov / (239) 321-7931.