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
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)
200 even when the point isn’t in any zone — in_flood_zone: false is the signal.
Check by property ID
is_flood_zone flag if it’s already set on the property row, falling back to the spatial query otherwise.
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.
Related endpoints
- Heritage status — Listed building & conservation area data (often correlated with flood risk)
- Properties — Use the
is_flood_zone=falsefilter to exclude flood-risk listings entirely - Spatial search — Combine viewport queries with flood-risk filtering