For homes in England, this can be done instantly and for free simply by entering property’s postcode and house number on the Government’s long term flood risk assessment page which also includes links to flood risk information and maps for Wales, Scotland and Northern Ireland. This tells you how likely it is that the specific location is to flood in the future, and the factors that could cause or contribute to flooding there, as well as where to get information on preparing for a flood and how to sign up for flood warnings.  

The Government portal also provides a map where you can enter your postcode to see a map showing the flood risk from rivers or the sea, or the flood risk from surface water. Use it’s ‘detailed view’ option to see depth, flow speed and flow direction estimates.