Guide
Being in a flood area is one thing. Getting affordable insurance is the thing that actually bites, and the safety net that keeps it affordable has a catch for newer homes.
Plenty of homes sit in a flood risk area and are perfectly fine to live in. For a buyer, the harder problem is usually the insurance rather than the water itself. If you can't get affordable cover, a mortgage gets difficult, and so does selling the place on later.
The government's flood risk service tells you the risk at a specific address, both from rivers and the sea and from surface water, which are mapped separately. buyerside flags it on the report, but the official service is where you confirm the detail.
In a flood area an insurer may decline, load the premium heavily, or cover the home but exclude flood damage. So don't assume, get a real insurance quote before you commit, and ask the seller directly whether the property has ever flooded.
Flood Re is a reinsurance scheme that keeps flood cover affordable for high-risk homes. You don't deal with it directly, your insurer uses it behind the scenes, so you just gather quotes as normal. It runs until 2039.
The catch that matters when buying: Flood Re only covers homes built before 1 January 2009. A newer build in a flood area falls outside the scheme, so its insurance can be expensive or hard to arrange. And buildings cover through Flood Re does not apply to flats in blocks of more than three, where the freeholder insures the structure instead. Both are worth checking before you offer.