A LOMA can amend a FEMA flood map for a property on natural ground, while a LOMR revises the effective map and a LOMR-F applies when fill raised a property. Check an address for nearby records, then confirm any result with FEMA's official letter.
What do LOMA, LOMR, and LOMR-F mean?
A Letter of Map Amendment (LOMA) is FEMA's determination for a lot or existing structure on natural ground that has not been elevated by fill. A Letter of Map Revision (LOMR) changes an effective Flood Insurance Rate Map. A LOMR-F is a map revision based on fill placed to raise a lot or structure. See FEMA's LOMA and LOMR-F guidance, MT-1 technical guidance.
How to read the Map changes result
The address result may list LOMR records and nearby LOMA point records returned by FEMA's map data. "No LOMR or LOMA on record at this point" means this lookup did not find a matching record in the queried data; it is not a certified determination that no letter exists. FEMA's letter controls. LOMA points are approximate, and a nearby record may apply only to the property described in that letter.
This lookup is informational and is not a certified flood zone determination.
How to request a FEMA map change
FEMA accepts online Letter of Map Change requests through the Online LOMC portal. eLOMA is an online option designed for registered Licensed or Certified Professionals. FEMA's MT-EZ form is for a single residential lot or structure when its eligibility rules fit. FEMA explains these options in its MT-1 guidance. Check FEMA's instructions for the evidence and application type your situation requires.
How to download the FEMA letter PDF
Open the FEMA Map Service Center and search for the property or community. From the results, use Show All Products to find available Letters of Map Change and open the relevant case document. FEMA's Map Service Center guide describes searching by address and accessing available LOMCs.
Last updated: 2026-11-08
Sources: FEMA MT-1 Technical Guidance; FEMA Map Service Center guide.