New-build flood risk raises a question that buyers should consider before committing: can the property be insured now, and what might changing flood risk mean when they later sell or remortgage?
On 29 September 2026, the Guardian reported Aviva’s warning that new English homes in flood-risk areas could become uninsurable.
For conveyancers, this is a reason to examine the evidence behind a purchase carefully. A newly constructed property still needs scrutiny of its flood exposure, insurance arrangements and any matters requiring further investigation.
What Aviva’s research says about new-build flood risk
Aviva’s February 2026 analysis of new homes and flooding examined 396,602 homes recorded as built in England between 2022 and 2024.
It identified:
- 43,937 homes, approximately 11%, in areas with medium or high flood risk;
- 101,657 homes, approximately 26%, with some flood risk; and
- a projected increase to 15% of those homes being at medium or high risk by 2050.
These figures describe different levels of risk across a defined group of properties. They do not establish that every home in an identified area will flood or become uninsurable. They do, however, make the longer-term question relevant to a buyer’s decision.
Why buyers should check Flood Re eligibility
Flood Re is intended to improve the availability and affordability of flood insurance for eligible homes. Its eligibility criteria generally require a property to have been built before 1 January 2009, alongside other conditions.
A purchaser of a newly built home should therefore not assume that Flood Re will provide support if obtaining flood insurance becomes difficult.
Check the official Flood Re eligibility criteria against the property and proposed policy. Being outside the scheme does not itself mean a home is uninsurable, but it is an important distinction when considering future insurance options.
Planning documents, searches and insurance answer different questions
A buyer may understandably take comfort from a development having planning permission, drainage proposals and flood protection measures. The conveyancing review should nevertheless examine what the available documents actually establish.
A useful approach is to separate the questions:
- Search evidence: what risk has been identified, and does the report recommend further investigation?
- Development documents: what flood assessments, drainage arrangements and relevant conditions are recorded?
- Technical advice: does a specialist need to explain the implications for the individual property?
- Insurance: what cover is available to the buyer, on what terms?
- Lender instructions: what checks, reports or approvals are required for this transaction?
Conveyancers should identify the limits of the information available and explain where the buyer needs specialist advice. A desktop search result should not be presented as a prediction of whether a particular building will flood.
Check the lender’s instructions and the insurance position
Where the lender uses the UK Finance Mortgage Lenders’ Handbook, the conveyancer needs to consider the applicable general and lender-specific instructions, together with the mortgage offer and any separate instructions.
Section 6.14.1 of the England and Wales Handbook addresses reasonable enquiries to establish that buildings insurance has been arranged from no later than completion. The contractual allocation of risk may make an earlier insurance discussion necessary.
Where flooding is relevant, establish what the proposed insurance arrangements mean in practice. Questions about flood cover, exclusions, excesses or conditions should be resolved with the appropriate insurer or broker and, where required, reported to the lender.
For the wider professional framework, read Flood Risk and Mortgage Lender Requirements: What Conveyancers Should Consider.
Look beyond the first purchase
A buyer’s immediate concern may be getting the mortgage approved and completing before a reservation deadline. The advice should also help them understand the limitations of what has been established.
Insurance available today does not promise unchanged premiums, excesses or cover throughout the buyer’s ownership. Likewise, acceptance by the current mortgage lender does not promise acceptance by another lender when the property is sold or remortgaged.
The report on title should explain the identified risk, any further advice recommended and any unresolved uncertainty relevant to the buyer’s decision. Avoid predicting that a property will inevitably become uninsurable where the evidence does not support that conclusion.
What should a new-build buyer ask?
Before exchange, useful questions for the buyer’s advisers may include:
- What types of flooding does the search identify?
- Does the information relate to the individual plot or the surrounding area?
- Is further specialist investigation recommended?
- What flood assessment and drainage documents are available for the development?
- Who will maintain relevant drainage or flood protection infrastructure?
- Has suitable insurance been investigated for the buyer’s circumstances?
- What has the conveyancer checked or reported under the lender’s instructions?
The aim is to give the buyer an informed basis for deciding whether to proceed, seek further evidence or reconsider the purchase.
If flood risk becomes a problem after you bought
An owner may only appreciate the practical consequences when insurance becomes difficult, a remortgage raises questions or a prospective buyer hesitates.
That later difficulty does not automatically establish that the original conveyancer was at fault. Flood information, physical conditions and insurance terms can change.
However, where a risk was identified during the purchase, it may be worth examining what investigation was recommended, what advice was given and whether any relevant lender requirements were addressed.
The When I Bought flood-risk guide explains which original purchase records may help. These can include searches, the report on title, seller or developer replies, insurance information and lender correspondence.
If historical lender instructions are relevant, the Lexsure Lender Archive can help identify the recorded requirements for the lender and transaction date. Those records form part of the investigation alongside the conveyancing file.
Flood risk is affecting your property. What were you told when you bought?
If insurance, a sale or a remortgage has brought the problem into focus, your original purchase records may help explain what was known at the time.
When I Bought explains what evidence may matter and why the advice you received deserves examination where an identified risk was not clearly explained.
You do not need to decide whether anyone was at fault before exploring the issue.