We just added FEMA floodplain screening to every Groundcheck Report. When you check a property, Groundcheck now compares the parcel with FEMA National Flood Hazard Layer data and tells you whether mapped flood related areas intersect the site.
Floodplain is one of the first constraints worth checking because it can change usable area, building elevation, drainage design, insurance, financing, permitting, and the cost of further due diligence. A parcel can look large on a listing while a mapped flood area affects the part that is easiest to access or develop.
What Groundcheck checks
Groundcheck sends the saved parcel polygon to FEMA and looks for intersecting flood hazard features. If a parcel boundary is unavailable, it runs an approximate check around the address point using a 30 meter buffer.
The result includes available flood zone, zone subtype, Special Flood Hazard Area status, base flood elevation, vertical datum, depth, and flood map panel fields. Groundcheck keeps the FEMA source link with the finding so you can inspect the official record.
How the report treats the result
Groundcheck flags an intersection with a Special Flood Hazard Area or an A or V zone as a high screening concern. It treats other mapped flood related intersections as moderate. When FEMA returns no intersecting feature, the report shows a low screening result.
That risk level is a first pass. It does not decide whether you can build, where a structure should sit, or which local rules apply.
- Check whether the mapped area affects the likely building envelope or only a remote edge of the parcel.
- Ask the local floodplain administrator which ordinance and map revision apply.
- Confirm whether a survey, elevation certificate, flood study, or lender review is needed.
- Review access routes, utilities, grading, and stormwater plans along with the building location.
Why this adds real value
A simple address search often tells you only that a property touches a flood zone. Groundcheck uses the parcel boundary when available, puts the result beside wetlands, soils, slope, roads, and environmental findings, and gives you specific questions to investigate.
That context helps you decide whether a property deserves deeper review before you spend money on design, engineering, or a nonrefundable commitment.
What this layer cannot prove
FEMA mapping is essential for screening, but it does not show every drainage problem or guarantee that an unmapped area will not flood. Map revisions, local studies, small streams, site grading, blocked drainage, coastal conditions, and recent development can matter.
Always confirm important floodplain decisions with FEMA, the local jurisdiction, your surveyor, engineer, insurer, and lender.
Use the new layer
Check the property you are considering
Groundcheck combines this source with parcel details and other available national, state, and local layers.
Start a property check See every Groundcheck data layerGroundcheck provides early public data screening, not a legal, engineering, surveying, environmental, planning, permitting, or buildability determination. Verify important findings with the responsible agencies and qualified professionals.