Drybrook has some flood risk, though not much, and it is confined to a few spots. Only a sliver of the village's postcodes fall in the river flood zones. A few homes are mapped at high risk. The last recorded river flood was more than half a century ago. Which house you buy matters more than which village you choose.
The Environment Agency's river-and-sea mapping puts about 1% of Drybrook's postcodes in Flood Zone 3, the highest-probability band, and about 4% in Flood Zone 2. The two zones are separate bands. Zone 2 is the medium-probability fringe beyond Zone 3, so the 4% is in addition to the 1%. The Environment Agency has four recorded flood events for the area, the latest in July 1968, when a main river overflowed a channel with no raised defences.
The village has no separate surface-water figure. Rainwater flooding is counted in the broader postcode measure below, together with rivers and the sea.
With the Environment Agency's climate allowance added, the river-and-sea zones grow to cover about 5% of postcodes. That shows how far the modelled zone would spread under wetter conditions. It is a model of what might happen, and no particular year is attached to it.
For insurance, the risk is concentrated. Most homes here sit outside every flood zone and should be quoted as such. A house in one of the mapped hollows is a different case, and the insurer will price it on its own postcode. Get an indicative insurance quote for the exact address early on, because the premium is often the first place a flood flag appears.
Looking at each postcode across several measures at once, including surface water as well as rivers and the sea, about 7% of Drybrook's postcodes rate high on at least one of them, about 14% medium and about 30% low. One flag on one measure is enough to count. That makes this a broader net than the flood zones, so the numbers are bigger.
Counted in homes, the picture is smaller still. The Environment Agency's rivers-and-sea register lists only postcodes that carry some risk, and in Drybrook that is one postcode covering 23 properties. Three of them are at high risk and one at medium risk, and none fall in the low or very low bands. Of those three high-risk properties, two are homes.
Defences make little difference either way. About 1% of postcodes fall inside the modelled high-risk extent without defences, and the same 1% fall inside it with them. In the Environment Agency's model, "defended" only means a defence is present. A defence existing tells you nothing about whether the house beside it stays dry.
The coast is about 7 kilometres away for the typical postcode, and the shoreline plan for that stretch is to hold the line for the next 20, 50 and 100 years. Hold the line means the authorities intend to keep the current shoreline in place. It is a stated intention that depends on funding nobody has committed yet, and it says nothing about what defences stand there today.
The nearest tide gauge with a long record is at Liverpool's Georges and Princes Piers. It recorded sea level rising about 1.4 millimetres a year between 1858 and 1983. That is a measured past rate from a gauge a long way off that stopped reporting decades ago. It shows how little the sea features in Drybrook's flood story.
Drybrook's flood risk is middling. Most streets sit well clear of every flood map, but a small number of properties carry a real flag, and buyers should find out which of the two groups a house belongs to.