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Minimum Lowest Floor Elevations (LFE)

The  City’s  floodplain  management  ordinance  requires  that  new  construction  or  substantially  improved  or  substantially damaged existing buildings must comply with the following:

  • Residential structures in A Zones must have their lowest floor elevated to or above the Base Flood Elevation (BFE) plus 1 foot or to the Design Flood Elevation (DFE), whichever is higher.
  • Non-residential structures in A Zones must have their lowest floor elevated to or above the BFE plus 1 foot or to the DFE, or they can be dry-floodproofed to or above the BFE plus 1 foot or the DFE, whichever is higher.
  • In V Zones, the building must be elevated on piles and columns and the bottom of the lowest horizontal structural member supporting the lowest floor must be elevated to or above the BFE plus 1 foot or to the DFE, whichever is higher.
  • In X Zones, no BFE’s are shown.  However, the lowest floor must be at least 1.5’ (18 inches) above the centerline of the abutting roadway unless otherwise approved by the City.

Substantial Improvement or Damage Review for Existing Structures (FEMA 50% Rule)

If you plan to improve or repair an existing structure that is located within an A or V Flood Zone please review the Substantial Improvement or Damage Review Package which explains the FEMA 50% Rule.  It also contains helpful information about the review process and the necessary application, affidavits and cost estimate form that must be submitted along with your building permit application.

Other FEMA and floodplain management documents are available for download under Permit Applications & Forms.

Last updated: 4/24/2017 11:03:43 AM