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Floodplain Map Changes

Application processes that are required to change FEMA's floodplain maps.

A Letter of Map Change (LOMC) is a letter that reflects an official revision to an effective Flood Insurance Rate Map (FIRM). FEMA issues LOMCs in place of the physical revision and republication of the effective FIRM.

Online LOMC Application

  • The Online LOMC Application is an internet-based tool that allows applicants to easily request a Letter of Map Amendment (LOMA) or Letter of Map Revision (LOMR) to a flood map.
  • It is a convenient way for applicants to upload all information and supporting documentation and check the status of their application online.
  • Users can submit LOMC requests and pay any associated fees, through this tool instead of filing the MT-EZ, MT-1 or MT-2 paper forms submitted through the mail.
  • Online LOMC Frequently-Asked-Questions pdf file
  • Online LOMC How-to-Guides


Other LOMC Guidance

Portable Document Format Symbol Portable Document Format (.pdf). Visit for a list of free .pdf readers for a variety of operating systems.

NH Office of Strategic Initiatives
Governor Hugh J. Gallen State Office Park
Johnson Hall, 3rd Floor  |  107 Pleasant Street  |  Concord, NH 03301
(603) 271-2155  |  fax: (603) 271-2615