Chipping Campden has a real flood risk, and most of it falls from the sky. Its rivers threaten only a sliver of the area. Rain runoff is the bigger worry. About a quarter of postcodes rate high on at least one flood measure. A hilltop wool town is still capable of getting wet, and the river maps show only part of how.
The Environment Agency's river-and-sea mapping puts about 2% of the area's postcodes in flood zone 3, the highest-probability band, and a further 6% in zone 2, the medium-probability band just outside it. Those are separate bands, so the 6% is in addition to the 2%. Measured by rivers and the sea alone, most of Chipping Campden and its villages is clear.
Surface water is the other half of the story, and the river zones leave it out. Recorded flood outlines from past events cover about 7% of the area's postcodes, and the Environment Agency holds 52 recorded flood events here. The most recent was in July 2007, when a main river overflowed its channel with no raised defences in the way. Water that runs off the hills and along lanes and gardens is mapped on a separate layer. Look up the exact address on the Environment Agency's long-term flood risk service and check the surface-water layer, because the river-and-sea map shows nothing of it.
With the Environment Agency's allowance for climate change added, about 9% of postcodes fall inside the river-and-sea flood zones. That is a modelled scenario of where the zones could reach, and it is the figure planners and insurers increasingly look at.
For cover, a home inside a mapped zone or with a past surface-water claim can expect insurers to ask more questions and to quote higher, and a few may decline. Old stone houses add to the cost, because drying out and repairing a listed building to the required standard costs more than refitting a modern box. Get a quote on the actual house early. The premium can change the sums more than a few thousand pounds off the price.
The postcode-level picture combines several measures, rivers and sea alongside surface water, and counts a postcode at the level of its worst one. On that basis about 24% of the area's postcodes rate high on at least one measure, about 20% medium and about 33% low. Postcodes are only flagged here, and that tells you nothing about each house, because one postcode covers a whole group of homes.
Counting properties instead of postcodes, the Environment Agency's rivers-and-sea mapping lists 30 postcodes in the area with some risk, holding 608 properties. Of those, 121 are at high risk, 42 at medium and 48 at low, and 75 of the high-risk properties are homes. Postcodes with no river or sea risk are left off the list, so the 608 is just the part of the area the rivers can reach.
The defence question has a short answer. About 2% of postcodes fall inside the high-risk extent with defences left out of the model, and about 2% with them included. The modelled defences make no measurable difference to the high-risk outline. Where a defence does appear in the model it marks something built to slow the water, and that still leaves a property behind it exposed.
The nearest tide gauge is at Portsmouth, which recorded sea level rising at about 2mm a year between 1962 and 2023. That is a measured past rate on a coast a long way south, and the sea is not where Chipping Campden's water comes from.
Flood risk is one of the weaker parts of the picture here. The rivers spare most homes, but runoff and the river-edge properties put enough of the area at real risk that every buyer needs to check their own address.