Flood risk for UK homebuyers — what to check before you offer

Updated 2026-08-21

Flood risk is easy to overlook until you need insurance or a mortgage survey flags it. England and Wales have detailed official maps; Scotland and Northern Ireland use their own agencies.

On Local Area Check we surface whether there are active flood alerts nearby and link you to the right official checker for that nation. Active warnings are time-sensitive — they tell you what is happening now, not the long-term probability for a plot.

Before you offer, open the GOV.UK flood-risk service (or SEPA / NI equivalents), enter the exact address, and look at rivers, surface water and reservoirs. Ask the seller and solicitor about past claims. Buildings insurance quotes can reveal risk faster than a brochure.

A postcode in a low-risk band can still sit next to a high-risk street. Always zoom to the property, not just the outcode.

Start with a postcode search here, then follow through to the official map for the final word.

Check a postcode

See crime, prices, flood risk and schools for any UK postcode.

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