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Flood risk

Check whether a UK location is inside a flood risk zone. Backed by 144,000+ flood zone polygons stored as PostGIS geometries, sourced from the Environment Agency flood map (England & Wales) and SEPA (Scotland). Required scope: planning:read Cost: 1 request per call Available on: Starter, Professional, Business

Check by coordinates

PostGIS ST_Contains check against the flood_zones table. If the point falls inside multiple overlapping zones, returns the highest-risk match.

Request

Response (in zone)

Response (no risk)

The endpoint returns 200 even when the point isn’t in any zone — in_flood_zone: false is the signal.

Check by property ID

Looks up the property’s stored coordinates and runs the same check. Honours the precomputed is_flood_zone flag if it’s already set on the property row, falling back to the spatial query otherwise.
Returns the same FloodRiskResponse shape.

Risk levels

Use cases

  • Conveyancing checks — Pre-flag flood risk before instructing a search
  • Mortgage underwriting — Lenders can decline or surcharge high-risk properties
  • Insurance scoring — Quote adjustments based on flood zone overlap
  • Investor due diligence — Filter portfolio acquisitions by flood risk
  • Refurb planning — Avoid putting flood-vulnerable improvements in zone 3 properties

Coverage

Total: 144,237 polygon records across all UK home nations.
  • Heritage status — Listed building & conservation area data (often correlated with flood risk)
  • Properties — Use the is_flood_zone=false filter to exclude flood-risk listings entirely
  • Spatial search — Combine viewport queries with flood-risk filtering