Mostly no, and the exceptions are specific enough to check before you make an offer. Rivers and the sea barely touch this place. The water that causes trouble here falls out of the sky and sits where the ground has stopped accepting it. Around a tenth of postcodes carry a high rating on at least one flood measure, which is not a rounding error. Low risk overall, with a short list of addresses that deserve a proper look.
Taking rivers and the sea first, the Environment Agency's flood zones cover very little of the area. About 1% of postcodes sit in zone 3, the highest-probability band, and about 2% sit in zone 2, which is the additional medium-probability fringe lying beyond zone 3 rather than a larger circle drawn around it. Those two bands do not stack on top of each other, and neither is large.
Surface water is the mechanism that actually matters here. It is rain arriving faster than ditches, drains and ground can clear it, and it does not care where a river is. It is also why the wider set of flood indicators catches far more postcodes than the river-and-sea zones do, and why a house nowhere near a watercourse can still take water across a driveway in a bad hour.
Looking forward rather than back, once the climate-change allowance is applied the zone footprint grows to about 5% of postcodes. That is the mapped picture on current assumptions rather than a prediction of any particular winter.
For insurance, the practical consequence is that most of Bransgore is unremarkable to an underwriter and a small number of addresses are not. Cover and excess are set on the individual property, not the village, so an indicative quote on the exact address before instructing a solicitor is worth more than any area-level assurance, including this one.
Counting by postcode across all indicators, including surface water, about 10% carry a high rating on at least one measure, 12% a medium rating and 25% a low one. Those bands overlap with the zone figures above rather than adding to them, and they describe postcodes rather than houses.
Counted as properties, the Environment Agency's rivers-and-sea mapping lists 645 properties across the 31 postcodes that carry any risk at all. Of those, 37 are at high risk, 24 at medium and 87 at low, and 29 of the high-risk properties are residential. Postcodes with no risk do not appear in that list at all, so this is the shape of the exposed edge rather than a count of the village.
On whether anything stands between the water and the building, about 1% of postcodes sit inside a modelled high-probability extent with no defence present in the model, and about 1% sit inside one where a defence is present. Around 6% sit in a low-probability undefended extent. A defence appearing in a model means it has been mapped, not that a given house is protected.
Roughly 80% of postcodes fall under a shoreline management plan, and the stated policy over the twenty, fifty and hundred-year horizons is to hold the line. That is an intention to maintain coastal defences, not a guarantee anyone has signed, and not evidence a defence already exists in a particular spot. The nearest coastline is about 1.7 kilometres away at the closest point, with a median distance of about 5.4 kilometres, so the coastal question here is about the wider system rather than the end of the garden.
At the nearest tide gauge, at Portsmouth, records running from 1962 to 2023 show sea level rising by about 2 millimetres a year. That is a measured historic rate over six decades of readings, not a forecast.
No historic flood extents are recorded for this area. That is genuinely reassuring, and it is a record of what was mapped rather than proof that no water has ever come through a door. It also did not settle the local argument: planning permission for housing on flood-prone ground near Derrit Lane was granted in 2023 over a substantial pile of objections.
Flood risk here sits in the middle of the range. The river-and-sea exposure is small, the rain-driven exposure is wider than the zone maps suggest, and the whole question comes down to a specific address rather than a village-level answer.