Free Flood Risk Check UK 2026: Every Source Compared
The free Environment Agency flood map covers most of what you need before making an offer. Here's exactly how to use it, where the free check falls short, and what the £7.99 Buyer Address Report adds (insurance impact, historical events, surface water layer).
Quick answer
Free: Environment Agency Flood Map for Planning (England), Natural Resources Wales, SEPA (Scotland), Rivers Agency (NI). All postcode-level, instant, no signup. Paid (£7.99):PostcodeCheck Buyer Address Report adds the insurance impact, historical flood events for the address, surface water layer interpretation, and ties flood risk to the rest of the buyer-decision picture (coal, radon, planning, crime trajectory).
Every UK flood-risk source compared
| Source | Cost | Coverage | Includes |
|---|---|---|---|
| EA Flood Map for Planning | Free | England | River + coastal zones, surface water layer |
| Natural Resources Wales | Free | Wales | River + coastal + surface water |
| SEPA Flood Maps | Free | Scotland | River + coastal + pluvial |
| Rivers Agency NI | Free | Northern Ireland | River + coastal |
| PostcodeCheck Buyer Report | £7.99 | UK | All EA layers + insurance impact + historical events + 12 other risks (coal, radon, subsidence, crime, planning, etc.) |
| Solicitor environmental search (Groundsure) | £60-120 standalone, £250-450 in a pack | UK | Formal indemnity wording for legal use at exchange |
Run the £7.99 Buyer Report on the address
Flood, coal mining, radon, planning apps, crime trajectory, school catchment, investment forecast and stamp duty. £7.99, instant PDF.
Step-by-step: free EA flood check
- Go to
gov.uk/check-long-term-flood-risk - Enter the postcode (or click the map)
- Read the river/sea verdict (high / medium / low / very low)
- Toggle the surface water layer — this is increasingly the bigger issue
- Note the flood zone (Zone 1, 2 or 3) and any defences shown
Where the free check falls short
- Insurance impact — free maps don't tell you whether the property is Flood Re-eligible (pre-2009 build) or excluded
- Historical flood events at the property — the EA holds this data but doesn't expose it to public maps
- Surface water interpretation — the layer exists but the verdict is hard to read; rainfall + drainage capacity matters
- Annual probability vs visible verdict — Zone 2 means 0.1-1% annual probability, which is a lot in a 25-year mortgage
- No tie-in with other risks — flood is rarely the only risk; coal, radon, subsidence, planning all matter
What the £7.99 Buyer Report adds
- EA flood verdict (river + surface water + sea) for the exact address
- Historical flood events recorded at the address
- Flood Re eligibility check (pre/post-2009 build status)
- Insurance impact summary (what to expect on quotes)
- Plus 12 other buyer risks: coal mining, radon, subsidence, planning apps within 500m, crime trajectory, school catchment, investment forecast, stamp duty, mortgage affordability, comparable sold prices, EPC profile
- PDF + permanent shareable link
When you actually need a paid environmental search
The £60-120 standalone environmental search (Groundsure or Landmark) and the £250-450 full conveyancing pack are commissioned by your solicitor at exchange. They include formal indemnity wording you need for the transaction. The £7.99 PostcodeCheck Buyer Report is for the OFFER stage, not exchange. Use ours pre-offer to filter out flood-risk red flags cheaply; use solicitor searches at exchange.
Check this address before you make an offer
Flood, coal mining, radon, planning apps, crime trajectory, school catchment, investment forecast and stamp duty. £7.99, instant PDF.
Run the flood + 12 other checks on any UK address
Free area report shows postcode-level flood. £7.99 Buyer Report adds address-level verdict, historical events, insurance impact + 12 other risks.