Flood Risk Check
Check flood risk for any UK property. See river, surface water, and environmental risk data from our 29M+ property database.
Powered by Homedata API — environmental risk data for 29M+ UK properties
Access flood, noise, and environmental risk data via REST API
Flood Risk FAQ
What flood risk zones exist in the UK?
The Environment Agency categorises flood risk into four types: river (fluvial), surface water (pluvial), coastal (tidal), and groundwater. Each has risk levels from very low to high, based on the probability of flooding in any given year.[1]
Does flood risk affect property value?
Yes — properties in high-risk flood zones typically sell for 10-15% less than comparable properties in low-risk areas. Insurance costs are also significantly higher. Flood risk is a material consideration that must be disclosed during property sales.[2]
Can I access flood risk data via API?
Yes — the Homedata API provides flood risk assessment, noise levels, landfill proximity, and environmental scores for any UK property via UPRN. Free tier: 100 calls/month. Get your API key.
Sources
Further reading
Integrate into your own product
Free to startExact flood zone classification (Zone 1, 2, 3a, 3b) for river, surface water, coastal, and groundwater flood risk — including annual probability of flooding and whether statutory flood defences are recorded for the property.
Structured as JSON · queryable by UPRN or postcode · ready to embed in any application
Exact measurements
Real values — distances, concentrations, counts — not rounded ratings
29M+ UK properties
Every address queryable by UPRN or postcode
REST API
JSON responses, OpenAPI docs, sandbox — first call in under 5 minutes
Free tier: 100 API calls/month across all endpoints, no credit card required. Paid plans from £29/month for production use. Compare plans →