Danbury is at low risk of flooding from rivers and the sea, and the risk that does exist comes mostly from rain. None of the village is in the official river-and-sea flood zones. A handful of properties are still at high risk on the Environment Agency's own mapping. Some postcodes flag on surface water. The coast is miles away, and the main flood risk here is heavy rain running off the hill.
On the Environment Agency's flood map for planning, none of Danbury's postcodes are in Flood Zone 3, the highest-probability band for river and sea flooding, and none are in Flood Zone 2, the medium-probability band beyond it. Danbury is 112 metres up, the river is not the problem here, and the planning maps agree.
Surface water is a different measure and tells a different story. It is rain that cannot drain away fast enough, and on sloping ground it collects wherever the slope sends it. That risk varies from one stretch of lane to the next, so a village-wide answer can only go so far. Put the exact address into the Environment Agency's long-term flood risk service and look at the surface-water map, because that is the layer most likely to matter for a house in Danbury.
The Environment Agency's climate-adjusted flood zone, which looks ahead to wetter conditions, also covers none of Danbury's postcodes. Even on the future flood maps, rivers and the sea stay a long way below.
For most homes in Danbury, flood risk should not be a big factor in insurance. The few that flag high on a surface-water or river measure are a different case, and insurers will see the same maps the buyer does. On those streets, get a quote early in the purchase, not after exchange.
The postcode-level picture combines several measures, surface water included. A postcode counts if it flags on any one of them. On that basis, about 6% of Danbury's postcodes carry a high risk on at least one measure, about 5% medium and about 19% low. A postcode only needs to flag on one measure to count, so these shares cover more than the river-and-sea zones above and should not be added to them.
Counting homes is more useful. The Environment Agency's rivers-and-sea risk register lists just one Danbury postcode, with 14 properties on it. Seven of them are at high risk and none at medium, low or very low, and four of those high-risk properties are homes. Only postcodes with some risk appear on the register, so the other postcodes are not on it at all. Even in a village with no flood zones, a few homes are at high risk.
On the modelled flood extents, none of Danbury's postcodes fall inside the high-probability extent, with or without defences counted. That means the model has nothing to defend here. It does not mean every house is safe. It means river and sea flooding are not what the model sees for this village.
The shoreline management plan for the nearest coast sets a policy of hold the line for the next 20, 50 and 100 years. That is a statement of what the authorities intend, and it depends on funding that has not been promised. It also says nothing about what defences are there today. Danbury is at least 4 kilometres from the coast, and about 6 kilometres for a typical postcode, so the policy matters more to the estuary villages below.
No flooding is on record within Danbury's boundary. That is reassuring, but a record only holds what someone reported and wrote down.
Overall, Danbury's flood risk is middling. River and sea flooding barely applies on a hill like this, but surface water and a small group of high-risk properties are enough that each address needs checking.