National Flood Insurance Program

The City of Frisco participates in the National Flood Insurance Program (NFIP) of the Federal Emergency Management Agency (FEMA). As a participating community, the city has adopted Floodplain Management practices through several ordinances that severely limit the development allowed in 100-year floodplains (the area inundated by a storm that has a 1% chance of happening in any year). For property with any portion located within the 100-year floodplain, regardless of structure location, a flood insurance policy may be required.

City of Frisco standards require all new structures be constructed 2 feet above the adjacent water surface elevation of the 100-year floodplain. Additionally, the city requires that no portion of any residential lot be included in the 100-year floodplain. When developing along a major creek within the City of Frisco, the developer must submit a Flood Study to the city showing the 100-year floodplain and water surface elevation based on both current land-use and future land-use assumptions.

Flood Insurance Rate Maps

Flood Insurance Rate Maps (FIRMs) delineate the floodplains throughout the United States and are used by lenders and insurance companies to determine if your property is in a floodplain. The FIRMs for the City of Frisco were last published for Collin County in June 2009 and Denton County in April 2011. Paper copies are available for viewing at the Engineering Services Department or may be viewed and printed online for free at the FEMA Map Service Center.

Letters of Map Revisions

Flood Insurance Rate Maps, like the Frisco landscape, can change. If a developer wishes to alter and/or fill a portion of the floodplain, they must prepare a Flood Study showing no adverse effects or substantial changes in the water surface elevation. This flood study, along with a detailed application, may be submitted to FEMA to be considered for a Letter of Map Revisions. If approved, the Letter of Map Revisions serves as an official revision to the FIRM. Individual property owners may also contest the floodplain designation for their property by submitting information to FEMA.

Lenders and insurance companies are not always aware of these changes, so it may be necessary to call the Engineering Services Department at 972-292-5400 to determine if the floodplain map for your area has changed and to receive a copy of the change. Many Letters of Map Change can also be obtained online from the FEMA Map Service Center.