Sumner County Flood Zone and Flood Map Guide

Use FEMA’s Flood Map Service Center to search a Sumner County property by address and identify its current effective flood map and zone. For a property inside Gallatin city limits, contact the Gallatin Planning Department about flood-zone boundaries and permits. For unincorporated Sumner County property, contact the county Engineering and Floodplain Administration section. A map result is a starting point—not a substitute for a property-specific determination, survey, elevation certificate or insurance review.

Last verified: August 16, 2026

Geographic scope: Sumner County, including Gallatin

If you are buying, renting, renovating or building in Sumner County, the first step is to check the property’s current FEMA flood map. Search the address in FEMA’s Flood Map Service Center, then confirm the result with the agency responsible for that property. Gallatin handles floodplain questions within the city limits, while Sumner County’s Engineering and Floodplain Administration section coordinates development requests within designated FEMA flood zones in the county’s jurisdiction.

A flood-zone label can affect construction rules, permits, an elevation certificate, a lender’s insurance review and the questions you should ask before closing. It does not, by itself, provide a complete prediction of every way a property could flood.

How to check a Sumner County flood zone

1. Start with FEMA’s official map

FEMA identifies its Flood Map Service Center as the official source for National Flood Insurance Program flood-hazard information. The service provides access to official flood maps, FIRM panels, Flood Insurance Studies, Letters of Map Change and National Flood Hazard Layer information.

Use this basic process:

1. Open FEMA’s Flood Map Service Center.
2. Search the complete property address, including the city and ZIP code.
3. Review the map result and the flood-zone designation.
4. Note the FIRM panel number, effective date and any displayed base-flood elevation or floodway information.
5. Download or save the map panel or FIRMette for your records.
6. Ask the appropriate local floodplain official to confirm how the map applies to a planned project or property decision.

A map search should be performed again before a purchase, construction project or permit application. FEMA mapping products can be revised, amended or superseded, including through Letters of Map Change.

2. Confirm the local jurisdiction

The correct local contact depends on the property’s legal jurisdiction—not simply its mailing address.

• Inside Gallatin city limits: The City of Gallatin Planning Department works with residents on flood-zone boundaries and administers city floodplain regulations. Gallatin states that a Floodplain Development Permit is required before a building permit or other development activity on a lot or parcel within a designated Flood Hazard Area.
• Unincorporated Sumner County: The county’s Engineering and Floodplain Administration section coordinates requests for development within a designated FEMA flood zone and reviews applications for compliance with applicable FEMA requirements.
• Other incorporated communities: If the property is in another municipality, confirm that municipality’s floodplain office or permitting process before proceeding. Do not assume Gallatin or county procedures apply. The Gallatin Planning Department’s jurisdiction is the City of Gallatin and its planning responsibilities, so a different local authority may apply outside city limits.

What common FEMA flood zones mean

FEMA’s zone designations describe mapped flood hazards, but the exact meaning depends on the map, study and location. Common terms include:

Map designation — General meaning — Questions to ask

Zone A — A Special Flood Hazard Area subject to the 1-percent-annual-chance flood, generally mapped without a detailed base-flood elevation. — Is a detailed study or elevation information available?

Zone AE — A Special Flood Hazard Area where detailed analysis has established base-flood elevations. — What is the applicable base-flood elevation, and is the property in the floodway?

Shaded Zone X — An area associated with moderate flood hazard, including the mapped 0.2-percent-annual-chance flood area in FEMA’s general classifications. — Does the lender, insurer or local official require additional documentation?

Unshaded Zone X — An area outside the mapped 0.2-percent-annual-chance floodplain in FEMA’s general classifications. — Could drainage, nearby waterways or site conditions create flooding not shown on the map?

Floodway — The channel of a stream plus adjacent floodplain areas that must be kept free of encroachment so the base flood can be conveyed without substantially increasing flood heights. — What engineering analysis and local approvals are required?

FEMA defines the base flood as the flood with a 1-percent chance of occurring or being exceeded in any given year. That is commonly called the “100-year flood,” but the term does not mean a flood happens only once every 100 years.

FEMA’s zone definitions also distinguish between areas with detailed base-flood elevations and areas mapped using approximate methods. A Zone AE designation generally includes a base-flood elevation, while an unnumbered Zone A generally does not.

What a flood map can—and cannot—tell you

A FEMA map can help identify the mapped flood zone, the applicable FIRM panel and, in some areas, a base-flood elevation or floodway. It is the appropriate starting point for a regulatory and insurance review.

It cannot answer every property question. A map search may not tell you:

• Whether a structure’s lowest floor is above or below the base-flood elevation.
• Whether a garage, crawl space, accessory structure or addition meets current requirements.
• Whether a past Letter of Map Amendment or Letter of Map Revision affects the property.
• Whether local drainage, stormwater, creek overflow or surface-water conditions create flooding not shown on the map.
• Whether a planned renovation is considered development or a substantial improvement under the applicable rules.
• What flood-insurance coverage, premium or lender determination will apply.

The City of Gallatin specifically advises property owners to check floodplain status before applying for a building permit or purchasing property.

When an elevation certificate or floodplain permit matters

An Elevation Certificate documents surveyed elevations of a structure and related information. It may be required for a project, permit review, construction stage or insurance discussion, but whether one is required depends on the property, project and responsible authority.

Gallatin states that an Elevation Certificate may be required before or during construction for new construction and substantial improvements in or near a flood-hazard area. The city may also require a floodplain study or other plans showing the location, dimensions and elevations of existing or proposed structures, fill, storage and drainage facilities.

Sumner County lists floodplain-development permits, elevation certificates, floodproofing certificates and no-rise/no-impact certifications among its floodplain-management resources. A no-rise or no-impact certification is an engineering matter; property owners should not prepare or rely on one without guidance from the responsible authority and a qualified professional.

Before clearing land, placing fill, adding a structure, grading, changing a driveway or beginning a substantial renovation, ask the local floodplain administrator whether a permit or technical document is required.

Flood insurance and home-buying questions

A lender’s flood determination and an insurance quote are separate from a casual map lookup. FEMA’s National Flood Insurance Program materials explain that federal law can require flood insurance for buildings in a Special Flood Hazard Area when the building secures a federally regulated or federally backed loan.

If you are buying a home in Sumner County, ask these questions before your inspection or closing deadlines:

• What flood zone is shown for the building—not just the parcel?
• Is the structure in a floodway or near a mapped boundary?
• Has the seller provided an Elevation Certificate or prior flood-insurance information?
• Have there been previous flood claims, water intrusion or drainage problems?
• Does the property have a Letter of Map Amendment, Letter of Map Revision or other map-change documentation?
• Will the lender require flood insurance?
• What does the policy cover, and what exclusions or waiting periods apply?
• Does the planned renovation require local floodplain approval?

A property outside a mapped Special Flood Hazard Area is not automatically free from flood risk. Conversely, a map designation alone does not establish the actual damage history or insurability of a particular building. Use the FEMA map, local records, a professional inspection and insurance guidance together.

Gallatin and Sumner County contacts

City of Gallatin Planning Department

Gallatin’s Planning Department lists its office at 132 W. Main Street, Gallatin, TN 37066, with a phone number of 615-451-5796. Use the department for questions involving flood-zone boundaries, city floodplain regulations and floodplain-development permitting within Gallatin city limits. Confirm current hours and staff availability before visiting.

Sumner County Engineering and Floodplain Administration

Sumner County lists the Engineering and Floodplain Administration office at 355 N. Belvedere Drive, Room 202, Gallatin, TN 37066, with a phone number of 615-451-6097. The county page identifies Marshall Boyd as County Engineer and Floodplain Administrator. Confirm the current contact, office hours and application requirements before submitting a project.

Sumner County flood-map checklist

Save this checklist before buying, renting or developing property:

• [ ] Search the complete address in FEMA’s Flood Map Service Center.
• [ ] Record the flood-zone designation, FIRM panel and effective date.
• [ ] Check for a mapped floodway and base-flood elevation.
• [ ] Determine whether the property is inside Gallatin city limits, another municipality or unincorporated county territory.
• [ ] Contact the responsible floodplain administrator before construction or land disturbance.
• [ ] Ask whether an Elevation Certificate, floodplain study, floodproofing certificate or no-rise certification is required.
• [ ] Request insurance and lender guidance before closing.
• [ ] Recheck the map, local requirements, fees and contacts immediately before relying on them.

For an official map lookup, begin with FEMA. For a local determination or development question, use the applicable city or county floodplain office. That two-step process helps turn a Sumner County flood-zone search into a more useful property decision.

Related MyGallatin resources

See My Gallatin’s related Emergency Preparedness & Safety, Moving to Gallatin, Gallatin government services and Sumner County home-buying resources for additional local planning information.