Flood Risk Data API UK — Property-Level Flood Zone Scores
Instant flood risk scores by UPRN. River flooding, surface water flooding, coastal risk, and groundwater — each with Low, Medium, High, or Very High labels from Environment Agency data. Used by insurers, conveyancers, mortgage lenders, and PropTech platforms building due diligence tools.
What's in the API
River flood risk
Risk of flooding from rivers and streams. Low/Medium/High/Very High label with underlying Environment Agency flood zone classification.
Surface water flood risk
Risk of flooding from rainfall runoff — the most common type of flooding in urban areas. Separate risk label from river flooding.
Coastal flood risk
Tidal and coastal flood zone classification for coastal properties. Relevant for properties within 5km of the coast.
Groundwater flood risk
Susceptibility to groundwater emergence — particularly relevant in chalk and limestone geology areas.
Sample response
{
"uprn": "100023336956",
"address": "14 Victoria Road, Bristol BS8 4ES",
"flood_risk": {
"river": {
"risk": "Low",
"flood_zone": "1",
"probability": 0.01
},
"surface_water": {
"risk": "Medium",
"probability": 0.03
},
"coastal": {
"risk": "Very Low",
"in_coastal_zone": false
},
"groundwater": {
"risk": "Low"
},
"overall": "Medium"
}
}Pricing
Flood risk is included for every account — 1 token a call.
Pay as you go
100 tokens = £1
most calls 1 token
£50 a month
5,500 tokens a month
+10% bonus
£250 a month
30,000 tokens a month
+20% bonus
£500 a month
67,500 tokens a month
+35% bonus
Top up any amount from £10 and get exactly the tokens you pay for. Add tokens monthly instead and earn bonus tokens: 10% on any monthly amount, up to 75% from £2,500 a month. Change the amount or stop any time; unused tokens roll over.
See full pricing →FAQ
What data source does the flood risk API use?
Flood risk data is sourced from the Environment Agency's Risk of Flooding from Rivers and Sea (RoFRS) dataset and the updated long-term flood risk data.
Is the flood risk data up to date?
We update flood risk data when Environment Agency releases new versions, typically annually. The current version in use is noted in the API response.
Can I bulk-screen a portfolio for flood risk?
Yes — pass UPRN lists to the API endpoint. A monthly subscription earns bonus tokens for portfolio-scale work.