Yes. Shepperton Green is a flood-zone suburb. Most of its postcodes are in the river's medium-probability zone. A small slice is in the high-probability zone. Allow for a wetter climate and almost all of it is included. The risk is broad and mostly moderate, and no street is clear of it.
By the Environment Agency's river-and-sea flood zones, about 84% of Shepperton Green's postcodes are in Flood Zone 2 and about 6% are in Flood Zone 3. The two bands don't overlap. Flood Zone 3 is the high-probability core, and Flood Zone 2 is the medium-probability ground beyond it. Here, that medium-probability ground covers most of the place.
Rain that has nowhere to go is a separate risk from the river overflowing. The Environment Agency maps it separately, and it only shows up here in the postcode-level indicators further down.
Adjust the Environment Agency's zones for a changing climate and 99% of Shepperton Green's postcodes fall inside. On that version of the map, it is very hard to find a postcode that is out of reach of the water.
For insurance, a flood-zone postcode affects both the premium and how much an insurer asks before quoting. Get a buildings insurance quote on the exact address early, and look the house up on the Environment Agency's long-term flood risk service while you're at it. The mapping varies from one postcode to the next, and so do the quotes.
At postcode level, the Environment Agency's indicators include surface water alongside rivers and sea. About 4% of Shepperton Green's postcodes rate high on at least one measure, 42% rate medium on at least one, and 87% rate low on at least one. These bands overlap with each other and with the flood zones above, so none of the numbers should be added together.
Counting homes gives a clearer picture. The Environment Agency's rivers-and-sea mapping lists 1,969 properties across the postcodes in Shepperton Green that carry any risk at all. Of those, 18 are rated high, 191 medium, 1,512 low and 13 very low. Postcodes with no risk don't appear in the list, so these numbers describe the exposed part of the place, not all of it. Most homes here are rated low risk, and low is still a rating an insurer will ask about.
Defences don't change much here. In the Environment Agency's model, about 6% of Shepperton Green's postcodes fall inside the high-risk flood extent whether defences are included or not. "Defended" only means the model includes a defence. It doesn't mean the house stays dry, and here it doesn't shift the outline at all. The record points the same way. Eleven flood events are recorded, the most recent in January 2003, when a channel overflowed at a stretch with no raised defences.
The nearest tide gauge in the national record is at Portsmouth. It measured sea level rising by about 2 millimetres a year between 1962 and 2023. That is a long way from here, and Shepperton Green's water comes down the river.
On flood risk, Shepperton Green is middling. A few homes carry serious risk, most carry some, and almost no postcode carries none.