​​​​​The National Flood Insurance Program requires that any structure located in the Special Flood Hazard area that has improvements or repairs equaling 50 percent of the value of the structure must be brought into full compliance with current Flood Insurance Rate Map Requirements. In addition, Lee County requires that the calculation for the value of the improvements or repairs must include all permits obtained in the past five years.

This often comes into play during the remodeling of older structures, which were built before 1984 when Flood Insurance Rate Maps were adopted or for structures built to compliance to outdated maps.

Lee County encourages property owners and contractors to contact Community Development’s Building Services staff to discuss proposed improvement or repair projects that might trigger substantial improvement/substantial damage regulation, often called “the 50 percent rule.”

Historic structures may be exempt from these requirements if the compliance would threaten the structure’s continued eligibility for historic designation.


Flood mapping quick links: