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Letter of Map Changes

This page provides information on the revalidation and re-issuance process for Letter of Map Changes (LOMCs), how to check the status of a current LOMC application and other related topics. This page is intended for parties who have submitted or interested in submitting a LOMC application.

When a new or revised FEMA Flood Insurance Rate Map (FIRM) panel becomes effective, it automatically supersedes previously issued LOMCs for the area covered by that panel, including Letters of Map Revision (LOMRs), Letters of Map Revision Based on Fill (LOMR-Fs) and Letters of Map Amendment (LOMAs) that have been issued for the property(ies) on the revised FIRM panel. LOMCs are documents issued by FEMA that revise or amend the flood hazard information shown on the FIRM  without requiring the FIRM to be physically revised and re-published.

Change My Flood Zone Designation

If a property owner thinks their property has been inadvertently mapped in a Special Flood Hazard Area (SFHA), they may submit a request to FEMA for a Letter of Map Change. A SFHA is defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. A LOMC reflects an official revision/amendment to an effective Flood Insurance Rate Map. If the LOMC request is granted, property owners may be eligible for lower flood insurance premium or the option to not purchase flood insurance.

Applicants can use the Online LOMC application, an internet-based tool, to easily request a Letter of Map Amendment (LOMA) or Letter of Map Revision (LOMR). Users can submit an amendment or revisions application through this tool instead of filing the MT-EZ, MT-1 or MT-2 paper forms via mail.

Get started today using the Online LOMC application.

How Do I Check the Status of My Application?

If you submitted a LOMC application through Online LOMC, you may check the status of your application by logging into your Online LOMC account. The application status is listed on the homepage after you log in. For more information, view the application status definitions.

If you submitted a request for a LOMC through the mail using the paper MT-1, MT-2, MT-EZ forms or used the eLOMA application process, visit the Status of Map Change Requests webpage for more information.

LOMC Revalidation Process and Resources

In recognizing that some LOMCs may still be valid even though the flood hazard information on the FIRM has been revised, FEMA has established an automatic process for revalidating LOMCs. This automatic process to revalidate LOMCs includes a detailed comparison of the Base (1-percent-annual-chance) Flood Elevations (BFEs) shown on the new or revised FIRM and the lowest adjacent grade or lowest lot elevation of previously issued LOMCs. The determinations for those structures or lots that are above the new or modified BFE or are located in areas of the community that are not affected by updated flood hazard information are revalidated through a formal determination letter—called a LOMC Revalidation or LOMC-VALID, letter—that FEMA issues to community officials immediately preceding the effective date of the new or revised FIRM. FEMA also mails the LOMC-VALID letter on the day following the new FIRM's effective date to the community's map repository to be kept on file.

For additional information on the LOMC revalidation process, interested parties are encouraged to read Subsection 1.15 (Revalidation Processing) of FEMA's Document Control Procedures Manual and Understanding FEMA's Summary of Map Actions and Revalidation Letter document.

LOMC Subscription Service

The LOMC-VALID letter is included in the regular LOMC Batch Files. This service groups together and indexes newly issued LOMCs on a regular bases and makes them available for download on the FEMA Flood Map Service Center (MSC). Interested parties are encouraged to visit the LOMC Batch Files page.

For Questions on Revalidation Process and To Order Copies of Letters

If you have further questions about revalidation process or LOMC-VALID letters, please call the FEMA Mapping and Insurance eXchange, toll free, at 1-877-FEMA MAP (1-877-336-2627). To obtain a copy of a specific LOMC-VALID letter, contact the map repository for the community in which the property is located or send a written request to the address listed below. A fee will be charged for all letters obtained.

FEMA Engineering Library
3601 Eisenhower Avenue, Suite 500
Alexandria, VA 22304-6426
Facsimile: 1-703-960-9125

LOMCs That Are Not Revalidated

LOMCs that have been issued for multiple lots or structures where the determination for one or more of the lots or structures have changed cannot be revalidated through the automatic process described above. Further, on occasion, LOMCs are inadvertently left out of the revalidation process. To request that FEMA review a LOMC that has not been included in a LOMC-VALID letter, please submit the following:

  • A letter requesting the re-issuance (Please provide the case number of the LOMA or LOMR-F to be re-issued) and
  • A copy of the LOMA or LOMR-F to be re-issued, if available.

FEMA will then review the case file and issue a new letter reflecting its determination. All requests should be sent to the following address for processing:

LOMC Clearinghouse
3601 Eisenhower Avenue, Suite 500
Alexandria, VA 22304-6426 To expedite processing, please address your request to the attention of the following processing specialists:

Attention: LOMA DEPOT (Use for LOMAs, LOMR-Fs, Conditional Letters of Map Revision-Based on Fill and Conditional Letters of Map Amendment)

Attention: LOMR DEPOT (Use for Letters of Map Revision and Conditional Letters of Map Revision)

For More Information

To learn more about Flood Hazard Mapping, download the Flood Hazard Mapping Overview Fact Sheet

For more information or additional assistance:

Last Updated: 
04/08/2020 - 08:50