LOMA for Vacant Land: What It Covers

A LOMA for vacant land can remove an entire parcel or only a legally described portion from the Special Flood Hazard Area (SFHA). Before relying on a seller’s claim that the lot is “out of the flood zone,” check which land FEMA’s Letter of Map Amendment covers and whether the proposed house fits within it. Indiana DNR’s April 2021 guide, printed page 29, explains partial-parcel removal and the restrictions that remain on the balance.

The letter also needs to be checked against current mapping. An existing-land determination, a conditional comment on a proposed house, and permission to build answer different questions.

Get the complete FEMA determination

Ask the seller for the issued letter, every continuation page and attachment, and the supporting survey. An application, elevation certificate, or listing screenshot does not establish what FEMA decided.

Federal rules require a LOMA to identify the community, map number, and property excluded from the designated flood zone. Read that identification alongside the determination itself; an address at the top of the letter does not establish whole-parcel coverage. 44 CFR § 70.5.

Keep these records together:

• The FEMA case number and letter date.
• The map panel number and map effective date referenced in the letter.
• The recorded deed or plat identifying the parcel.
• The exact land description or structure identified in the determination.
• Any qualifications, additional considerations, or later FEMA correspondence.

If the current parcel resulted from a subdivision or boundary change, ask the surveyor to reconcile today’s legal description with the one FEMA reviewed. Treat a mismatch as unresolved until the connection is documented.

Check the letter against the current flood map

Search the property at FEMA’s Flood Map Service Center, using coordinates if the vacant lot lacks a reliable street address. Save the effective map and check the community’s other map products and letters. FEMA warns that downloaded maps can become superseded.

Keep the letter’s issue date separate from the map’s effective date. If the relevant panel changed after the letter was issued, obtain the community’s final Summary of Map Actions and applicable revalidation letter. Match the exact case number and property.

FEMA’s February 2019 guidance distinguishes determinations incorporated into revised maps, determinations remaining effective or revalidated, superseded determinations, and cases requiring new decisions. Revalidation preserves the applicable determination’s original coverage. FEMA’s revalidation guidance.

If those records leave the letter’s status unclear, ask the local floodplain administrator to resolve the question before relying on the seller’s copy.

Compare the removed area with the planned home footprint

Have a licensed surveyor plot the removed area and proposed home on the same drawing. For a portion-of-property request, FEMA requires a certified metes-and-bounds description and map, using bearings and distances to define the enclosed area. FEMA’s November 2024 MT-1 guidance, section 4.8.

Ask the surveyor to show the house, attached garage, decks, and other proposed improvements, along with parcel boundaries and the area identified by FEMA. Include access, drainage, and utility work so the local reviewer can evaluate the complete project.

Hypothetical example: Assume a two-acre lot has a valid LOMA removing a quarter-acre rectangle. The house fits inside that rectangle, but an attached garage extends beyond it. The letter does not establish removal for the garage’s location. Moving the building, changing the design, or obtaining another determination would require further review. A driveway crossing the remaining floodplain raises a separate development question.

The drawing should make these relationships visible. Pair it with the other checks needed before buying a building lot, including access, utilities, and legal restrictions.

Match the FEMA request to existing or proposed conditions

Planning to build a house does not prevent FEMA from evaluating the land in its present condition. A Conditional Letter of Map Amendment (CLOMA) serves a different purpose: it requests FEMA’s comment on a particular proposed structure before it exists. 44 CFR § 70.9.

The fill-based definitions concern fill outside the existing regulatory floodway. A project affecting a floodway or flood elevations needs additional review of the appropriate process. 44 CFR § 72.2.

For a CLOMA, FEMA’s November 2024 guidance requires the proposed lowest adjacent grade—the lowest ground touching the structure—and a certified structure location. A conditional letter does not amend the effective map; final removal requires a subsequent determination based on completed conditions. MT-1 guidance, section 2.2.2 and glossary.

Grading history also matters when choosing an application. FEMA treats fill placed before the first National Flood Insurance Program (NFIP) map showing the area in an SFHA as natural grade for this purpose. Have the surveyor document that history; an apparently level lot does not establish whether fill was placed or when. MT-1 guidance, definition of fill.

Confirm construction and insurance requirements separately

Send the complete letter, current map records, and proposed site plan to the local floodplain administrator. Request written answers identifying the permits, elevations, and design requirements applicable to the work, including grading and improvements outside the removed area.

A FEMA determination does not establish compliance with every development requirement. Federal floodplain criteria are minimums; more restrictive state or community regulations take precedence. Ask which adopted ordinance and flood information the community will use for permit review. 44 CFR § 60.1(d).

Give the lender the land determination and proposed building location as well. Removal can allow the federal mandatory flood-insurance purchase requirement to be lifted, but the lender may still require coverage under its own policy. Obtain the lender’s conclusion for the actual project. Indiana DNR guide, printed page 28.

The insurance decision also depends on risk beyond the mapped boundary. FEMA explains that flood risk remains outside high-risk zones and that most homeowners insurance does not cover flood damage. Ask an insurance agent about coverage for the planned home even if the lender does not require it. FEMA’s flood-risk guidance.

Budget for missing evidence before the purchase deadline

LOMA requests are exempt from FEMA review and processing fees. Conditional and fill-based requests generally involve fees. 44 CFR part 72. Survey or engineering work needs a separate budget; request a written scope covering boundary reconciliation, elevations, application preparation, and responses to additional-data requests.

The federal timetable calls for a determination or other written comment within 60 days after receipt of adequate information and any required fee. Allow separate time to prepare the submission and resolve missing information. The timetable does not promise a favorable decision. 44 CFR § 72.4(g). Obtain the applicable application materials when filing rather than reusing the seller’s old packet.

Include that work in your land acquisition and development planning, alongside the broader transaction preparation covered in our practical buying guides.

Before the contractual review period ends, aim to have a determination confirmed against current mapping, a survey showing how the proposed home relates to the removed area, and written local and lender responses. If a material question remains unresolved, ask your real estate attorney to address it in the purchase terms.