Data catalogue/ Environmental risk/ Flood risk
Flood risk
Property-level flood risk from rivers, the sea, and surface water, sourced from DEFRA's NAFRA2 national dataset. A single API call returns the risk level for any of 29 million UK properties, with no GIS expertise required.
{
"count": 2,
"results": [
{
"risk_type": "flood_rivers_sea",
"label": "High",
"intersects": true,
"distance_m": 0,
"search_radius_m": 0,
"radius_description": "At property",
"score": null
},
{
"risk_type": "flood_surface_water",
"label": "Medium",
"intersects": true,
"distance_m": 0,
"search_radius_m": 0,
"radius_description": "At property",
"score": null
}
]
}Risk profile at a glance
Each property returns up to two flood risk scores, rivers & sea, and surface water, both from point queries at the property location.
Response fields
Returned for each flood risk sub-type in the results[] array.
| Field | Type | What it is |
|---|---|---|
| risk_type | string | flood_rivers_sea or flood_surface_water |
| label | string | High / Medium / Low / Very Low / Not detected |
| intersects | boolean | True if property is within a flood zone |
| distance_m | integer | |null 0 if at property, null if not applicable |
| search_radius_m | integer | 0, point query at property location |
| radius_description | string | Human-readable search area description |
| score | null | Not applicable for flood risk |
Built for
Mortgage lenders
Flag high-risk properties at application stage. Surface water risk is increasingly material for mortgage decisions, get both scores in one call.
Conveyancing tools
Add flood risk to property reports automatically. Required disclosure for buyers: previously needed a £30+ specialist search per property.
Insurance underwriting
Pre-underwrite portfolios at scale. Screen thousands of addresses in minutes to identify high-risk clusters before pricing.
curl "https://api.homedata.co.uk/risks/flood/?uprn=100023336956" \ -H "Authorization: Api-Key YOUR_KEY"
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