Around 5.2 million properties in England are at risk of flooding, according to the Environment Agency. For buyers, this can mean significantly higher insurance premiums, difficulties securing a mortgage, and the need for targeted flood-resilience investment. But with the right information, flood risk is manageable — and there are schemes specifically designed to help. Here is what you need to know before you exchange. For a broader overview of how flood risk affects the buying process, see our flood risk and house buying guide.
How to Check a Property's Flood Risk
Before making an offer on any property, check its flood risk from multiple sources — no single tool gives the full picture.
1. Environment Agency Long Term Flood Risk Assessment The EA's free online tool (check-long-term-flood-risk.service.gov.uk) shows flood risk from rivers and the sea, surface water, reservoirs, and groundwater. It classifies properties as:
- High risk — greater than 1 in 30 annual chance of flooding
- Medium risk — between 1 in 100 and 1 in 30
- Low risk — between 1 in 1,000 and 1 in 100
- Very low risk — less than 1 in 1,000
2. Local Authority Flood Risk Maps Many councils publish more detailed surface water flood risk maps as part of their Strategic Flood Risk Assessments (SFRAs), which are more granular than the EA tool.
3. Flood Search Reports Commercial environmental search providers such as Groundsure or Argyll Environmental produce comprehensive Flood Risk Reports for approximately £25–£50. These are typically obtained as part of conveyancing searches — for a full explanation of what conveyancing searches cover, see our conveyancing searches explained guide.
4. Seller Disclosure via TA6 Form The TA6 property information form, completed by the seller's solicitor, asks whether the property has ever been flooded. Deliberate concealment is a misrepresentation that could support a legal claim after completion.
Understanding the Different Types of Flooding
Not all flood risk is the same — and the type of flooding significantly affects both insurability and the appropriate resilience measures.
| Flood Type | Source | Key Characteristics |
|---|---|---|
| Fluvial (river) | Rivers overtopping or breaching banks | Usually predictable with warning; good EA mapping |
| Surface water | Overwhelmed drainage systems | Hard to predict; widespread; growing risk under climate change |
| Coastal | Sea inundation | Affects coastal and estuarial areas; linked to storm surge |
| Groundwater | Rising water table | Slow-onset; less common; often under-mapped |
| Reservoir | Catastrophic dam failure | Rare; included in the EA's Long Term Flood Risk tool |
Surface water flooding is increasingly important as a risk factor. Properties in low-lying urban areas far from any river can still face significant surface water risk during intense rainfall events — and many homeowners are unaware until it is too late.
Flood Re: What It Is and Who Qualifies
Flood Re is a reinsurance scheme established jointly by the UK government and the insurance industry in 2016 to make flood insurance affordable for high-risk residential properties.
Under Flood Re, eligible households can access home insurance with a capped premium for the flood element. Participating insurers transfer the flood risk to the Flood Re pool at a subsidised rate, enabling them to offer more affordable premiums to high-risk customers.
Eligibility criteria:
- The property must be a residential property in the UK
- It must have been built before 1 January 2009 — properties built after that date are excluded, on the basis that they were required to be built to flood-resilient standards
- It must be used as a private dwelling (not a commercial property or a buy-to-let portfolio with more than three units)
How premiums are capped: Flood Re caps are based on Council Tax band. In 2025, the capped flood insurance premium element ranges from approximately £210 per year for Band A properties to approximately £540 per year for Band H properties (buildings insurance only).
To access Flood Re, apply for home insurance through any participating insurer (most major UK insurers participate) and declare the flood risk. The insurer handles the reinsurance arrangement — there is no separate application for the homeowner.
Flood Re is a transitional scheme, running until 2039. After that, it is expected that flood risk will be reflected in full market premiums. Properties in high-risk areas may face significant premium increases over the coming decade as the scheme winds down.
Impact on Mortgage Offers
Some mortgage lenders refuse to lend on properties classified within Flood Zone 3 — the highest-risk zone in England, where the annual probability of flooding exceeds 1%.
Flood Zone 3 is divided into two sub-categories:
- Flood Zone 3a — high probability of flooding from rivers or the sea
- Flood Zone 3b (functional floodplain) — land where water regularly flows or is stored during flood events. The majority of mainstream lenders will not lend on Flood Zone 3b land.
Before making a formal mortgage application on a high-flood-risk property, speak to a whole-of-market mortgage broker with experience in complex property cases. A declined application leaves a footprint on your credit file — a broker can identify willing lenders before you apply formally. For renovation finance options on complex properties, see our renovation finance options guide.
Flood-Resilient Construction: Property Flood Resilience (PFR) Measures
Even in high-risk areas, property flood resilience measures can significantly reduce flood damage and may support your insurance case. There are two categories:
Flood Resistance (keeping water out):
- Flood doors and demountable flood barriers
- Automatic or self-closing air brick covers
- Non-return valves on drains and sewers to prevent backflow
- Waterproof rendering or tanking to external walls below flood level
Flood Resilience (reducing damage when water enters):
- Electrical sockets, consumer units, and wiring raised above predicted flood level
- Tiled or concrete ground floors rather than timber boards
- Waterproof wall finishes (tiles, waterproof plaster) below flood level
- Appliances (boiler, washing machine) raised above predicted flood level
DEFRA and Environment Agency Grants
DEFRA and the Environment Agency administer a grant scheme enabling eligible homeowners to fund PFR measures. As of 2025, eligible properties can receive up to £5,000 towards qualifying flood-resilience works.
Eligibility conditions:
- The property must be located in a designated high-risk area as part of an approved local flood risk management scheme
- Works must be carried out by an approved contractor
- Applications are made through your local authority's flood risk team
Schemes are administered locally, so availability varies across England. Contact your council's flood risk or drainage team to find out whether your area has an active grant scheme, or check the Environment Agency's local flood risk management pages. For a broader list of renovation grants and funding schemes, see our renovation grants and funding UK 2025 guide.
What to Check Before Exchange
| Check | Where to Look |
|---|---|
| EA Long Term Flood Risk rating | check-long-term-flood-risk.service.gov.uk |
| Surface water flood risk | Council SFRA or specialist search (Groundsure/Argyll) |
| Previous flood claims | TA6 property information form |
| Flood insurance availability | Request quotes from three insurers before exchange |
| Flood Zone classification (planning) | Environment Agency flood map for planning |
| Mortgage lender's position | Whole-of-market broker confirmation before formal application |
| Existing PFR measures installed | RICS Level 3 survey and solicitor's enquiries |
| DEFRA grant availability | Local authority flood risk team |
Questions to Ask in Conveyancing Searches
Your solicitor's environmental search should cover flood risk automatically, but don't rely solely on automated results. Specifically ask:
- Has a specialist flood risk search been obtained from a dedicated provider?
- Does the TA6 form record any previous flooding or flood insurance claims?
- Is the property within a flood risk area identified in the LPA's Local Plan?
- Has a Flood Risk Assessment been submitted with any planning permissions affecting the property?
- Are there any covenants or planning conditions requiring flood-resilience measures to be maintained?
Flood risk is not a reason to automatically walk away from a property — but it demands thorough due diligence, the right insurance arrangements, and potentially some targeted resilience investment. The combination of the Flood Re scheme, available DEFRA grants, and modern PFR measures means that many flood-affected properties remain both insurable and mortgageable with proper preparation.