Insurance Outcome
Flood risk insurance when buying a house: what to prove before exchange
Flood risk becomes a mortgage issue when buildings insurance is expensive, restricted, or unavailable. The right question is not only whether the address is in a flood-risk area, but whether you can insure it on terms your lender and budget can live with.
Last updated: 31 May 2026. Editorially reviewed: 31 May 2026.
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Check the property before you offer
Flood, subsidence, EPC, crime, schools, transport, broadband, tenure, age, listed status and price checks where data is available.
Run a free previewFlood evidence checklist
| Evidence | Why it matters | Who uses it |
|---|---|---|
| Flood maps | Shows mapped river, sea, and surface water risk. | Buyer, solicitor, insurer. |
| Environmental search | Formal conveyancing evidence reported to lender. | Solicitor, lender. |
| Insurance quote | Confirms practical insurability and excess. | Buyer, lender. |
| Seller claim history | Shows real-world flooding at the property. | Buyer, insurer, surveyor. |
What lenders and insurers worry about
Insurers look at river and sea risk, surface water risk, claims history, flood depth, property resilience, and local defences. Lenders usually focus on whether acceptable buildings insurance will be in place.
Flood Re can improve availability and affordability for many eligible UK homes, but it is not a reason to skip due diligence. Some homes, property types, or policy situations may fall outside the scheme, and the scheme is designed to transition the market before it ends in 2039.
Evidence to gather before exchange
- Environment Agency, Natural Resources Wales, SEPA, or local flood-map evidence for the exact address.
- Conveyancer environmental search result, including surface water as well as river/sea risk.
- Seller disclosure of past flooding, insurance claims, flood resilience works, and any flood warnings received.
- Written buildings insurance quotes that include flood cover and state the flood excess.
- Evidence of flood doors, airbrick covers, raised electrics, pumps, non-return valves, or other resilience measures where relevant.
Questions to ask before exchange
Ask your broker
- Does the lender need to see the insurance schedule before exchange or completion?
- Will this lender accept a high flood excess or specialist insurer?
Ask your solicitor
- What does the environmental search say about river, sea, surface water, groundwater, and historic flooding?
- Has the seller disclosed any flood event or insurance claim on the property information form?
Ask your surveyor
- Are there signs of previous flood damage or resilience works?
- Would flood risk change your view on value, damp risk, or repair priorities?
Ask your insurer
- Does the quote include flood cover and what is the flood excess?
- Is the quote supported by Flood Re, and are there restrictions I should understand?
When flood insurance risk is too much
- Walk away if you cannot obtain buildings insurance with flood cover acceptable to your lender.
- Walk away if the seller has undisclosed flood history and will not provide claim or repair evidence.
- Renegotiate if the property is insurable but only with materially higher premiums, excesses, or resilience costs.
- Pause if only river flooding has been checked; surface water can be the risk that changes the decision.
Related next steps
Frequently asked questions
Can you get a mortgage on a house with flood risk?
Often yes, if suitable buildings insurance is available. The lender's concern is usually insurance and resale risk rather than the flood-map label alone.
What should I check besides the flood zone?
Check surface water risk, past flooding, insurance claims, flood excess, resilience measures, and whether your lender accepts the proposed insurance.
Does Flood Re mean insurance will be affordable?
It can help eligible homes, but eligibility and policy terms still need checking. Get real quotes before exchange.
When should I pull out because of flood risk?
Pull out if insurance with flood cover is unavailable or unacceptable, if past flooding is undisclosed, or if the price does not reflect the risk and resilience cost.
Run the check before you commit
MyPropertyScan pulls property-risk signals into one buyer view so you can spot flood, subsidence, EPC, building-age, listed-status, and local-area prompts before you spend more on surveys, quotes, or legal follow-up.
Run the check
Check the property before you offer
Flood, subsidence, EPC, crime, schools, transport, broadband, tenure, age, listed status and price checks where data is available.
Run a free previewEditorial review
Editorial owner: BiteRight Ltd, operator of MyPropertyScan. We review buyer guides against UK public property datasets, RICS survey wording, lender requirements, and common buyer questions.
Pages are updated when source coverage, property-risk guidance, survey cost assumptions, or product checks materially change. Methodology and dataset limitations are explained on the MyPropertyScan methodology page.
Sources used
We use UK public and specialist sources where they are available. Public datasets can be incomplete, delayed, or missing for some addresses. Treat them as a starting point, not as a replacement for professional advice.
Source standard: preference goes to official government datasets, statutory bodies, professional standards, and primary dataset publishers. We cite the source family on the page and explain coverage limits rather than filling gaps with unsupported estimates.
General information only. Not legal, mortgage, insurance, surveying, or financial advice. Lender and insurer criteria vary by provider, property, evidence, and timing. Confirm with your own broker, conveyancer, surveyor, and insurer before exchange. MyPropertyScan is operated by BiteRight Ltd.