How does flood risk affect a UK property let or sale?
The Environment Agency (EA) publishes flood-risk data for England covering three risk types: rivers and the sea, surface water (rainfall + drainage capacity), and reservoirs. Each property gets a probability band (high, medium, low, very low) per type, plus presence of flood defences and known historical flood events. The data is free and authoritative; same dataset that insurers and the National Planning Policy Framework rely on.
Why each profession cares:
- Letting agents: the property-condition disclosure obligation under the Consumer Protection from Unfair Trading Regulations covers known flood history. A previously-flooded property is a material fact; failing to disclose is enforceable.
- Conveyancers: client due-diligence pre-contract is the standard expectation. The CON29 form covers some flood data; a parallel EA-sourced check fills the gaps the CON29 misses (especially surface water, which is the fastest-rising risk type).
- Insurers: flood probability drives premium and excess. A buyer who finds out the property is in a high-risk zone post-completion has limited recourse against the seller but a clear claim against the conveyancer who did not flag it.
Northern Ireland, Scotland, and Wales each have their own flood-mapping authorities (DfI Rivers, SEPA, NRW); Certaby's flood check uses the right one based on postcode.
Certaby's letting-agent and conveyancer suites both include flood-risk on the property section of the audit-cert PDF, with the EA / SEPA / NRW source named per match plus the historical-events list when present.
Source: Environment Agency Flood Map
Last updated 2026-05-09.