Yes, and more than almost anywhere else a commuter is likely to look. More than a quarter of the town's postcodes are in the highest river flood zone. Nearly half lie inside a recorded flood. Well over a thousand properties are rated at high risk from rivers. The Thames and the Colne meet in the middle of Staines, and they do not always leave politely.
On the Environment Agency's river-and-sea flood zones, about 28% of the town's postcodes are in Zone 3, the highest-probability band. A further 48% are in Zone 2, the medium-probability fringe beyond it. The two bands do not overlap, so between them they cover most of the town. Much of Staines was built on gravel islands that rise only a little above the floodplain of the two rivers, and the High Street runs along one of them to the old bridge. The Romans built on the same island, and the town shrank in the late second century, possibly because the winter floods got worse.
Surface water has its own history here. Sweeps Ditch, a former millstream east of the High Street, was largely diverted underground in the twentieth century, which moved it out of sight and not out of the drainage. There is no separate surface-water figure for the town in the Environment Agency's zones; it is folded into the postcode indicators further down.
The Environment Agency's climate-adjusted mapping puts about 94% of Staines postcodes inside a flood zone once allowances for future rainfall and river flows are added. That is a modelled look ahead, built on assumptions, and it describes the direction of travel the Environment Agency plans around.
Insurance follows the property's own rating. A house rated high from rivers can face higher premiums, larger excesses or a shorter list of insurers willing to quote, and a lender will want cover in place on the day of completion. The town flooded severely in 1894, 1947 and 2014, and the last of those is recent enough that sellers know whether their house was involved. Ask directly whether the property flooded in 2014, whether a claim was made, and get a quote from an insurer on that answer.
On this site's postcode indicators, which combine rivers, sea and surface water, about 20% of Staines postcodes rate high on at least one measure, about 33% medium on at least one, and about 63% low on at least one. One postcode can appear in more than one band, so those shares overlap with each other and with the zone figures above, and they should never be added together.
Counted as properties, the Environment Agency's rivers-and-sea mapping rates 1,435 at high risk, 1,386 at medium, 4,951 at low and 911 at very low, out of 10,729 properties on postcodes carrying some risk. Of the high-risk properties, 1,217 are homes. Postcodes with no rivers-and-sea risk at all do not appear in that count, so the total is the at-risk part of the town, and the at-risk part is most of it. The Environment Agency has 355 recorded flood events on file for the area, the latest dated February 2014.
Defences change less than people hope. About 28% of postcodes fall in the high-probability extent with no defences in the model, and about 23% fall in it with defences present. A defence in the model is a structure on a map. It says nothing about whether it holds on the night, and "defended" in a sales conversation is a word doing a job it was never designed for.
The nearest tide gauge is at Portsmouth, which recorded sea level rising by about 2 millimetres a year between 1962 and 2023. The Thames at Staines is upstream of Teddington Lock, beyond the tide. The sea is the one source of water this town can mostly leave off its list.
Flood risk is the weakest thing about Staines, and it is weak by any measure the Environment Agency publishes. Buy here with the property's own rating, its 2014 history and an insurance quote in hand, or leave it to someone who has.