Yes, and the marsh has never claimed otherwise. A quarter of the area's postcodes sit in the highest river-and-sea flood zone. Allow for climate change and almost the whole area is in the zone. The number of homes rated high risk right now is small. What keeps the kitchens dry here is maintenance, not height above the sea.
On the Environment Agency's river-and-sea mapping, about 25% of the Lydd area's postcodes fall in flood zone 3, the higher-probability band. A further 11% sit in flood zone 2, the medium-probability fringe beyond it. The two are separate bands, so zone 2 is the extra ring outside zone 3, not a bigger area that contains it. Lydd started out as a shingle island in a bay that later silted up into Romney Marsh, and the maps still show it.
Surface water from heavy rain is measured differently, and there is no standalone figure for it here. It shows up only within the postcode indicators further down, where it sits alongside rivers and sea.
Looking ahead, about 98% of the area's postcodes fall inside the Environment Agency's flood zone once its climate-change allowance is applied. That is a planning scenario, not a forecast for any single house. It still tells a buyer which way the risk is expected to move.
This matters for insurance. Homes in the higher zones can find cover harder to arrange and more expensive, and terms depend on the exact address rather than the town. A quote on the specific property, before solicitors are instructed, avoids the most expensive surprise in the process.
On the site's postcode indicators, which include surface water alongside rivers and sea, about 2% of the area's postcodes rate high on at least one measure, 6% medium and 20% low. These overlap with the flood-zone shares above. They measure something different and shouldn't be added to them.
Counting homes rather than postcodes gives a smaller number. The Environment Agency's rivers-and-sea risk mapping covers 2,747 properties in the area's postcodes that carry some risk. Of those, 22 are rated high, 26 medium and 25 low, and 1,704 very low. Postcodes with no risk at all don't appear in that count. Most properties sit in the lowest band because something is holding the water back.
That something shows up when the defences are taken out of the model. About 26% of the area's postcodes fall inside the high-probability flood extent when defences are ignored. With defences included, that drops to about 2%. "Defended" means a defence exists in the model, not that a house is safe. The gap between those two figures is the job the sea walls and ditches do every winter. Every postcode here also falls under the Romney Marshes Area Internal Drainage Board, which manages the drainage channels the marsh relies on.
The sea is close for some and a drive for others. About 18% of the area's postcodes lie within 500 metres of the coast, and the nearest is about 17 metres from it. The typical postcode is about 3.7 kilometres inland. The 500-metre line is just a threshold for measuring. It says nothing about the view from any particular window.
The shoreline management plan's policy for this coast is to hold the line over the next 20, 50 and 100 years. That means the stated intention is to maintain the defences. It is a policy, not a guarantee, and it depends on future funding that nobody can sign for today.
The nearest long-running tide gauge, at Dover, recorded sea level rising by about 2.2 millimetres a year between 1961 and 2010. That is a measured past rate, not a projection, and it points in only one direction.
No historic flooding is recorded across the Lydd area. That is reassuring, but it only means nothing reached the official record, which isn't proof that water has never come in.
Before buying:
- Put the exact address into the Environment Agency's long-term flood-risk service.
- Get a buildings insurance quote on that property before instructing a solicitor.
- Ask the seller directly about any flood claims or water ingress.
- Ask the searches provider to cover drainage board responsibilities for the plot.
Flood risk is one of Lydd's weaker points. Most homes stay dry because the defences and the drainage keep working, and a buyer here is betting that they will.