Flood Risk and Your Mortgage: Insurance, Lending and Flood Re
Flood risk can affect whether you can get a mortgage at all, not just how much your buildings insurance costs. Here's how lenders assess flood risk, how the Flood Re scheme keeps insurance available for higher-risk homes, and what to check before buying.
How Flood Risk Affects Mortgage Lending
Mortgage lenders require borrowers to hold adequate buildings insurance as a condition of the loan, protecting the lender's security (the property) as well as the borrower. Flood risk becomes relevant to lending primarily through this insurance requirement:
| Risk Level | Typical Lending Impact |
|---|---|
| Low/no flood risk | No impact — standard lending process |
| Moderate flood risk, insurance available (often via Flood Re) | Usually still lendable, though insurance cost should be factored into affordability |
| High flood risk, insurance difficult or expensive | Some lenders may be more cautious, or require evidence of adequate insurance in place before completion |
| Very high risk, insurance effectively unavailable | Some lenders may decline to lend at all, since the loan security can't be adequately protected |
In practice, the Flood Re scheme means genuinely uninsurable eligible residential properties are now relatively rare compared to the pre-2016 position, but higher premiums and excesses can still materially affect ongoing affordability even where lending itself proceeds.
What Is Flood Re?
Flood Re is a not-for-profit reinsurance scheme, backed by a levy on UK home insurers, designed specifically to keep flood insurance accessible for households at higher flood risk. It works behind the scenes:
- A participating insurer can offer you a standard buildings insurance policy and pass the flood risk element of that policy to Flood Re.
- Flood Re charges the insurer a set amount for taking on that flood risk, based on the property's council tax band, not the property's actual, specific flood risk level.
- This means homeowners in flood-prone areas pay a more predictable, capped premium for the flood risk element of their policy, rather than facing open-market pricing that could otherwise be very high or effectively unavailable.
You don't apply to Flood Re directly — it operates behind the scenes through participating insurers, and most mainstream UK home insurers do participate.
Flood Re Eligibility
| Criteria | Flood Re Eligible? |
|---|---|
| Residential property built before 2009 | Yes (subject to other criteria) |
| Residential property built 2009 or later | No — newer builds are excluded |
| Owner-occupied home | Yes |
| Small buy-to-let (typically up to a set number of units under scheme rules) | Often yes, check current scheme rules |
| Larger buy-to-let/commercial property | Generally no |
| Very high-value home (above the top council tax bands under scheme rules) | Generally no |
| Leasehold flats in blocks with buildings insurance arranged by the freeholder | Often handled differently — check directly |
The 2009 cut-off reflects a policy position that new developments should incorporate appropriate flood mitigation and should not be built in high-risk areas without it — new-build flood risk is intended to be managed through planning and building standards rather than the Flood Re safety net.
Checking Flood Risk Before You Buy
| Source | What It Provides |
|---|---|
| Environment Agency flood risk map (England) | Free online postcode-based river, surface water and coastal flood risk check |
| Natural Resources Wales / SEPA (Scotland) / equivalent NI body | Equivalent free flood risk maps for other UK nations |
| Solicitor's environmental search | Includes flood risk as part of standard conveyancing due diligence |
| Direct insurance quote | The most practical, real-world indicator of cost impact — risk maps show hazard, not what you'll actually pay |
It's worth checking flood risk maps before making an offer on a property, and obtaining an actual insurance quote before exchange of contracts, since flood risk (unlike many other property attributes) can have a material and ongoing effect on affordability that isn't always obvious from a general viewing or survey.
Cost Impact: What to Expect
| Flood Risk Level | Typical Buildings Insurance Impact |
|---|---|
| No/low risk | Standard market pricing, no flood-specific loading |
| Moderate risk, Flood Re eligible | Capped flood-risk premium element via Flood Re; overall premium moderately higher than a no-risk property |
| Moderate risk, not Flood Re eligible (e.g. post-2009 build) | Priced on the open market — could be higher, and specific insurer risk appetite varies |
| High risk | Higher premiums, higher flood-specific excess common, more limited insurer choice |
Excess levels specifically for flood claims are often set higher than the policy's standard excess, even for Flood Re-supported policies — this is worth checking specifically when comparing quotes, not just the headline premium.
Practical Steps
- Check flood risk maps for any property you're seriously considering, before making an offer, not after.
- Get an actual insurance quote rather than relying solely on the risk map classification — real premiums reflect much more specific, granular data than the broad public risk categories.
- Ask whether the property is likely to be Flood Re eligible (built pre-2009, standard residential use) if flood risk is a concern — this materially affects your likely insurance cost and availability.
- Factor ongoing insurance costs into your affordability calculations, not just the mortgage repayment itself, particularly for any property flagged with meaningful flood risk.
- Ask the seller about flood history and any mitigation measures already in place (flood barriers, non-return valves, raised electrics) — these can affect both risk and insurance cost, and a seller is required to disclose known flooding history as part of the standard property information form (TA6).
Frequently asked questions
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