All development within the Special Flood Hazard Area (SFHA), including VE, AE, AH, and A flood zones are required to be reviewed by Collier County. The following are general guidelines for building in the SFHA. The statements below for New Residential and New Non-Residential (Accessory) Structures apply primarily to AE, AH, and A flood zones. Contact Floodplain Management Section for more detailed information.
The most important step is to build a residence with the lowest living floor elevated above the Base Flood Elevation plus 1 foot (BFE+1). This is a requirement of the Florida Building Code. The lowest living floor of a new home must also be 18 inches above the crown of the road if paved or 24 inches above the crown of the road if unpaved. The crown of road requirements are standards established in the Collier County Floodplain Management Ordinance.
Non-residential accessory structures including detached garages and sheds can be built with or without a concrete slab. The lowest floor must be at or above the BFE OR if the lowest floor is below the BFE, all materials below BFE must be pressure treated or built with other flood resistant materials and the structure must have flood vents.
The substantial improvement/substantial damage requirement (50% Rule) applies to any reconstruction, rehabilitation, addition, or other improvement of an existing structure. The 50% Rule applies if the lowest living floor elevation is below the BFE + 1’ AND the cost of the work equals or exceeds 50% of the market value of the structure before the start of construction. An elevation certificate and/or 50% documents will be required to show compliance.
There are six major types of improvements that can be considered for an existing building that can help reduce or eliminate flood damage risks. They include:
- Wet Floodproofing**
- Dry Floodproofing**
- Levees and Floodwalls
- Demolition and Reconstruction
**Floodproofing techniques are approved for non-residential buildings and have specific requirements for their applicability.
For assistance: Contact the Flood Information Hotline at (239)252-2942 or email firstname.lastname@example.org
Page updated as of 04/23/18