Yes, and the reason is the reason the village exists: it was built on the north bank of the Thames. About a quarter of it is in the highest-risk river zone. Another four in ten are in the band just outside. Allow for climate change and nearly all of it is covered. The Thames put Shepperton on the map and keeps a claim on most of it.
The Environment Agency's river-and-sea flood zones put about 26% of Shepperton's postcodes in zone 3, the highest-probability band, and about 44% in zone 2. The two bands do not overlap: zone 2 is the medium-probability ring beyond zone 3, so together they reach most of the village. Lower Halliford, Church Square and the older riverside core were built where the barges used to load, and the flood zones follow the same line.
Surface water is a separate risk, from rain that cannot drain away fast enough, and it does not appear in the river zones at all. It is counted in the postcode measures further down. The Environment Agency has 93 recorded flood events for the area, the most recent in February 2014, and about 15% of the area lies inside its historic flood outlines.
Once the Environment Agency adds its allowance for climate change, about 98% of Shepperton is inside a flood zone. That modelled future is what insurers and lenders increasingly work from.
That shows up in cover. A home in zone 3 is likely to face more questions from insurers, higher premiums and a higher excess, and some policies will exclude flood or price it separately. Ask the seller for any past flood claims and get a buildings quote for the exact address early in the process, while walking away is still cheap.
Taking every measure together, including surface water, about 25% of Shepperton's postcodes rate high on at least one of them, about 44% medium and about 56% low. These bands overlap with each other and with the zone figures above, because a single postcode can rate high for the river and low for rain. They answer a different question from the zones, so the two sets of percentages should never be added up.
Counted by property, the Environment Agency's rivers-and-sea mapping lists 2,857 properties in the Shepperton postcodes that carry some risk: 513 at high risk, 391 at medium, 1,412 at low and five at very low. Of the high-risk properties, 437 are homes. Postcodes with no river or sea risk are left out of the list altogether, so the total is the number of properties the Environment Agency considers worth counting.
On the agency's modelled flood extents, about 22% of Shepperton's postcodes fall in the high-probability area with no defence in the model, and about 25% fall in it with one. A defence being present in the model means something stands in the water's way on paper. It says nothing about whether that defence holds, or whether water simply goes round it.
The nearest tide gauge in the national record is at Portsmouth, where sea level rose about 2 millimetres a year between 1962 and 2023. Shepperton's floods come down the Thames, so a gauge on the Solent coast is only background for this village.
Flood risk is one of Shepperton's weakest points, spread across most of the village and not confined to a few streets by the water. The river is the main attraction, and it has to be priced in as the main risk too.