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Container Glossary

Base flood elevation

Also called BFE

Definition

Base flood elevation is the height, given in feet above sea level, that floodwater is expected to reach at a specific spot during a base flood, the flood event with roughly a one percent chance of happening in any given year. It comes from FEMA flood maps and is the reference number a county uses to decide how high the lowest floor of a structure needs to sit in a mapped flood zone. Containers Delivered does not calculate or issue this number; your county floodplain office or a licensed surveyor does.

Measured as
Height in feet above sea level
Source
FEMA flood maps, read locally by the county
What it decides
How high a structure's lowest floor should sit
Who provides it for a parcel
The county floodplain office or a licensed surveyor

The decision this number is actually helping you make

Nobody asks about base flood elevation out of curiosity. The real question is: does this container need to sit higher than a normal set of blocks, or is a standard gravel pad and leveling enough. Base flood elevation is the number that answers it, because it tells you how high the water is expected to reach at that exact spot, not just whether the parcel is in a flood zone.

Two parcels can both sit inside the same mapped floodplain and still need completely different answers to that question, because the BFE is specific to the location, not the zone as a whole.

The deciding factor: how far below or above BFE your spot sits

Once you have a base flood elevation number for your parcel, the practical question is simple: how does the ground you want to use compare to it. Ground well above the BFE behaves like any other site: blocks, a gravel pad and normal drainage. Ground at or below it is where a county is more likely to ask for extra height, documentation, or in some cases to steer you toward higher ground on the same lot.

That comparison is also why a rough guess does not help you. A foot of difference on either side of the BFE can change what a county asks for, and the number itself has to come from the flood map or a survey, not an estimate.

Where this comes up for a container specifically

Base flood elevation is a building code concept, written for structures on foundations. A storage container on blocks is not a foundation in that sense, and Virginia's building code already exempts a storage container outright. Where BFE still matters is inside the separate floodplain review some counties require for anything new placed in a mapped zone, container included, and it is that review, not the building code, that could ask about elevation.

Getting the real number for your parcel

Call your county's planning or floodplain office with the parcel address or tax map number and ask whether a base flood elevation applies to that land, and if so, what it is. That is the only reliable source. We can talk through whether the ground on your lot looks well-drained once you know the number, but we are not surveyors and cannot issue an elevation figure ourselves.

No. That number comes from FEMA flood maps as read by your county floodplain office, or from a licensed surveyor. We can talk through site drainage once you have it.
Not automatically. It usually means your county's floodplain review looks more closely at that spot, which is a separate process from ordinary zoning and from the building code exemption for storage containers.
Have the number and want to talk site

Tell us the elevation your county gave you

We'll talk through blocking, drainage and pad height for your spot.

or (276) 237-6144