FloodMapReview logo

FloodMapReview.com

LOMA and LOMR-F guidance

Glossary

Conditional Letter of Map Revision Based on Fill (CLOMR-F)

A CLOMR-F is FEMA's conditional determination that a proposed fill project would qualify for a LOMR-F once completed.

A Conditional Letter of Map Revision Based on Fill, or CLOMR-F, is FEMA's preliminary review indicating that a proposed fill project would likely qualify for a LOMR-F once the work is finished. It gives developers, builders, and communities a formal signal that the project design meets FEMA's criteria before construction begins.

Start Eligibility ReviewBrowse Guides

Key takeaways

A CLOMR-F is issued before fill is placed, based on engineering plans and specifications.
It is not a final determination — you must apply for the actual LOMR-F after construction.
Communities often require a CLOMR-F before issuing development permits in the floodplain.
FEMA charges a review fee for CLOMR-F applications.

Why it matters

Developers building in flood zones need advance confirmation that their grading plan will satisfy FEMA requirements.
Skipping the CLOMR-F step can lead to costly rework if the final LOMR-F application is denied.
Some local floodplain ordinances require a CLOMR-F as a condition of the grading or building permit.

Frequently asked questions

What happens after I get a CLOMR-F?

After receiving a CLOMR-F, you proceed with construction according to the approved plans. Once the fill is placed and the site is graded, a licensed surveyor documents the as-built conditions with an Elevation Certificate. You then submit a LOMR-F application to FEMA for the final determination.

How much does a CLOMR-F cost?

FEMA charges a review fee for CLOMR-F applications, and you will also need to pay for engineering plans and supporting documentation. The total cost can be significant, so this process is typically driven by developers rather than individual homeowners.

Is a CLOMR-F required before placing fill?

FEMA does not universally require a CLOMR-F, but many local communities do as part of their floodplain management ordinances. Even where it is not required, obtaining one reduces risk by confirming the design meets FEMA standards before construction begins.

Can a homeowner apply for a CLOMR-F?

A homeowner can technically apply, but the process requires engineering plans and technical documentation that typically require professional assistance. In practice, CLOMR-Fs are almost always handled by developers, builders, or their engineering consultants.