Yes, from rain rather than rivers. None of the town sits in the river-and-sea flood zones. More than a quarter of postcodes still rate high on at least one flood measure. No past flooding is recorded. The water to plan for here falls from the sky, then collects on the wrong patch of road.
Start with rivers and the sea, the risk most buyers picture. On the Environment Agency's mapping, 0% of the town's postcodes fall in flood zone 3, the high-probability band, and 0% fall in flood zone 2, the medium-probability fringe beyond it. For a town with the Hambrook, a tributary of the River Adur, running through it, that's a clean result, and more than most places can say.
Surface water is a different measure. It is rainfall that arrives faster than the ground and drains can take it, pools in dips, and ignores flood-zone lines. Because the river-and-sea zones are empty here, anything that shows up on the wider indicators comes from sources such as surface water. It can affect one side of a street and leave the other side alone.
Looking ahead, the Environment Agency's climate-adjusted zone covers about 2% of the town's postcodes. That's a small area, but it's the planners' estimate of where the river-and-sea picture shifts once future rainfall is allowed for. Treat it as a forward look, not a forecast for any particular house.
For insurance, what matters is the address, not the town. A house on a postcode with no flood flags should insure like any other. A house on a surface-water hotspot may face higher premiums or questions about claims history. Get a real quote early. Discovering the premium after exchange is the kind of lesson people only need to learn once.
At postcode level, taking every measure together including surface water, about 27% of postcodes rate high on at least one measure, 23% medium and 41% low. These bands overlap with the zone figures above and should not be added to them. The high share is what pulls the town's flood rating down, and it's the number the sales particulars tend to leave out.
Counting homes rather than postcodes makes the river-and-sea risk look very small. The Environment Agency lists only three postcodes here as carrying any river or sea risk, covering 133 properties. Of those, three are rated high risk, one medium and three low, and all three high-risk properties are homes. Postcodes with no risk don't appear in this count at all.
On defences, the Environment Agency's high-risk flood extent covers 0% of postcodes, whether modelled with defences or without them. There is nothing here for a defence to hold back, which is a different thing from being protected by one. Where "defended" does appear elsewhere, it means a defence exists in the model, not that the house behind it stays dry.
Burgess Hill is inland, but the nearest tide gauge, at Portsmouth, recorded sea levels rising by about 2 millimetres a year over its record from 1962 to 2023. That's a measured historic rate and a distant one, useful as context for the south coast, not a threat to anyone's kitchen here.
There is no recorded historic flooding in the area. That's reassuring, but a missing record doesn't prove a flood never happened. A burst of summer rain that flooded a few gardens and never made the official record would leave no trace in this dataset.
Before making an offer on any Burgess Hill property:
- Enter the exact address in the Environment Agency's long-term flood risk checker, with the surface water results included.
- Ask the seller in writing whether the property has ever flooded or had a flood-related insurance claim.
- Get an indicative buildings insurance quote before instructing a solicitor.
- Ask the surveyor to comment on drainage and ground levels around the house.
Flooding is the town's weak spot. The rivers leave Burgess Hill alone, but the rain doesn't, so check each address rather than relying on the town's overall picture.