East Bedfont's flood risk comes from heavy rain, and the rivers barely come into it. Almost no postcodes sit in the river flood zones. About one in eight rate high once surface water is counted. Nothing in the official records shows the area flooding. The concern for a buyer is drains overflowing in a downpour, with very little chance of a river bursting its banks.
On the Environment Agency's river-and-sea flood zones, about 0.2% of East Bedfont's postcodes are in Zone 2, the medium-probability band, and none are in Zone 3, the highest. The two zones are separate bands, so Zone 2 covers only the fringe outside Zone 3. In this case neither band contains much of Bedfont. The Longford River runs through the area and dates from the reign of Charles I, yet it reaches almost none of the houses on the zone maps.
The surface-water picture is different. Bedfont is a suburb of post-war estates, roads and roofs, and when rain cannot soak into the ground it collects in streets and gardens. That risk comes from the land, and the river maps do not show it. The postcode figures further down include it, which is why they look so different from the zone shares above.
On the Environment Agency's climate-adjusted mapping, which models the zones with allowances for future rainfall and river flows, about 0.2% of postcodes fall within the flood zones, the same share as today. On that modelling, climate change barely moves the river risk here.
For insurance, the river side should be straightforward for almost every home in Bedfont. Insurers also look at surface-water risk, and that can affect premiums street by street. Put the exact address into the Environment Agency's long-term flood risk checker and look at the surface-water result separately from the river result, then get an indicative insurance quote while the sale is still at an early stage.
Counting every measure together, including surface water, about 12% of East Bedfont's postcodes rate high on at least one, about 27% medium on at least one, and about 56% low on at least one. A postcode can appear in more than one band, and these figures overlap with the zone shares above, so the two sets should never be added together. The postcode figures are much larger because they include rain on hard ground, which the river maps leave out.
The Environment Agency's rivers-and-sea mapping counts 182 properties in the six postcodes that carry any river or sea risk at all. Of those, 1 property is at high risk, none at medium, 27 at low and 1 at very low. None of the homes are at high risk. Postcodes with no river or sea risk are not on the list at all, so those 182 properties are only a small part of Bedfont.
In the Environment Agency's modelled flood extents, none of Bedfont's postcodes fall in a high-risk extent, either with defences or without them. About 0.2% are in a low-risk extent with no defence in the model. A defence in the model would only mean that one is present, and here the model found almost no flood risk for defences to deal with.
At the nearest tide gauge, Portsmouth, the sea rose by about 2 millimetres a year across its record from 1962 to 2023. The gauge is on the south coast, a long way from Bedfont, and the figure is a past measurement. It has little to say about a suburb whose nearest water is the Longford River.
There is no recorded flooding in East Bedfont in the historic records. A clean record cannot prove that no flood has ever happened, but on paper the area has stayed dry.
East Bedfont's flood risk is middling. Rivers barely trouble it, and the surface-water figures are high enough that each street needs checking. For most buyers the question is how well the roads around the house drain in a heavy storm.