South Brent is not a flood village, but it is not a flood-proof one either. About one postcode in a hundred sits in the highest river-and-sea flood zone. Roughly one in ten carries a high rating on at least one flood measure, which is a wider and looser thing. Water here is a valley-floor problem rather than a village-wide one. For most addresses the answer is a quiet no, and for a small number of them the answer is completely different.
In the Environment Agency's river-and-sea flood zones, about 1% of the area's postcodes fall in flood zone three, the higher-probability band, and about 3% in flood zone two, the medium-probability fringe that sits beyond zone three rather than wrapping around it. The two bands are exclusive, so they are read side by side and never stacked on top of each other.
Surface water is not published as a share of its own here. It is folded into the combined postcode indicator that treats rivers, sea and rainfall together. What does stand on its own is the record: historic flooding touches about 2% of postcodes across the area, and eight flood events have been recorded, the most recent in 1979, when an ordinary watercourse exceeded its channel capacity with no raised defences involved. A quiet record counts for something, though it is not a warranty.
Applying the Environment Agency's climate-change allowance widens the zone share to about 4% of postcodes. That is a modelled look forward at a bigger fringe, not a statement about which street gets wet.
For insurance, the address matters far more than the village. Most homes here will be quoted as ordinary risks. The ones inside the mapped zones, or with a claim already in the file, tend to find that flood cover arrives with extra questions, a heavier excess, or both. Get an indicative quote on the exact address before instructing a solicitor rather than after, and ask the seller outright whether the property has ever flooded.
Taking every measure together, surface water included, about 10% of the area's postcodes carry a high rating on at least one flood indicator, about 6% a medium rating and about 29% a low one. Those bands overlap the flood-zone figures rather than adding to them, so a postcode can legitimately appear in both. It is also the coarsest way to look at flooding, because two houses sharing a postcode can sit at meaningfully different heights.
Counted as homes rather than postcodes, the Environment Agency's rivers-and-sea mapping puts 37 properties at high risk, two at medium and 45 at low, out of 633 properties across the 22 postcodes that carry any risk at all. Thirteen of the high-risk properties are residential. Only postcodes with some risk appear in that list, so 633 is not a count of the village. Thirty-seven properties sounds like a rounding error right up until one of them is the house being viewed.
On whether anything actually stands between the water and the building, the modelled extents put about 1% of postcodes inside a high-probability extent with a defence present in the model, and about 1% inside a high-probability extent with no defence in it. A further 3% sit inside a low-probability undefended extent. The word defended there means a defence exists in the model and nothing beyond that. It is not a verdict that the water has been handled, and it is not something to buy on.
Shoreline management policy covers about 54% of postcodes here, and the stated policy across the 20, 50 and 100 year horizons is hold the line, meaning an intention to maintain defences along that stretch. An intention is not a guarantee, and it is not a defence that already exists. Keep it in proportion too: the coast is about 5.4 kilometres away at the nearest point and about 9.2 kilometres away for the typical postcode, and no postcode here sits within 500 metres of it.
The nearest tide gauge, at Devonport, recorded sea level rising by about 2.35 millimetres a year across its 1962 to 2015 record. That is a measured historic rate at a gauge well down the coast, not a forecast for this valley, and this far inland the watercourses matter a great deal more than the sea does.
Flood risk here lands in the middle: a handful of addresses carry genuine exposure while most of the village carries close to none. Which of those two a house belongs to is a question about the address, and it can be settled before the survey rather than after the move.