Flood Insurance Rate Map (FIRM)

Federal Emergency Management Agency (FEMA) Floodplain Maps Updated

FEMA has updated the Denton County flood map. FEMA and the National Flood Insurance Program (NFIP) uses this information to calculate federal flood insurance rates. View online maps.

To contact a FEMA Map Specialist, call 1-877-FEMA-MAP (1-877-336-2627) or send an email. Read the FEMA news release that was issued April 1, 2011.


Base Flood Elevations (BFEs) are the elevations of the surface of flood waters in streams and Lake Lewisville for the 100-year flood (1 percent-annual-chance). Standard homeowners’ insurance does not cover losses due to flooding. Homeowners in the Town of Little Elm may obtain separate insurance coverage for flooding, regardless of whether or not the property is located in the floodplain. BFEs are typically used by lending institutions to determine if flood insurance is required to secure a loan for property with homes or businesses. To view the maps, select the links below.

If you receive a letter from your bank and your property was out of the Flood Zone prior to the April 18, 2011 revision, you may want to obtain a "Flood Elevation Certificate" from a local licensed surveyor.

Town of Little Elm Letter of Map Revision

The Letter of Map Revision (LOMR) should be presented to your bank to verify you are no longer in the floodplain.