Yes, and the geography was never going to allow anything else. The town sits in a bowl where several streams meet and then leave as one river. A tenth of the town's postcodes sit inside the highest river-and-sea flood zone. Around a fifth of postcodes carry a high rating on at least one flood measure once surface water is counted. This is not a town with a flood problem in one unlucky corner; it is a town built on the drainage.
Taking rivers and the sea first, the Environment Agency's mapping puts about 7% of the area's postcodes in flood zone three, the higher-probability band, and about 7% in flood zone two, the medium-probability fringe that sits beyond zone three rather than including it. Those are two separate bands covering two separate rings of ground, so read them as roughly one in fourteen postcodes in each rather than as a single combined figure.
Surface water is the part that catches people out, because it has nothing to do with how far you are from the River Brit and everything to do with which way the hill behind you drains. Beaminster grew along the courses of streams running off slopes that rise well above the town, and water that arrives faster than the ground can take it goes where the contours send it. On the combined postcode indicators, which fold surface water in alongside rivers, around 43% of postcodes carry a low rating on at least one measure, which is the quiet way of saying most of the town appears somewhere on a flood map.
Looking forward, the Environment Agency's climate-adjusted zone covers about 7% of postcodes, which is the same footprint as the current higher-probability zone rather than an expansion of it. That is better news than most river towns get.
For insurance, expect the address to matter more than the town. Cover for a property inside a mapped zone is generally available through the industry's flood reinsurance arrangements, but the quote is written against the specific building, its floor level and its claims history rather than the postcode average. Getting an indicative quote before instructing a solicitor costs nothing and tells you more than any map.
On the combined postcode picture, around 22% carry a high rating on at least one measure, around 21% a medium one, and around 43% a low one. Those bands overlap with the zone figures above rather than adding to them, because a postcode can appear in both.
Counted as homes rather than postcodes, the Environment Agency's rivers-and-sea mapping puts 19 properties at high risk, 59 at medium and 187 at low, out of 668 properties across the postcodes that carry any risk at all. Sixteen of the high-risk properties are residential. Only postcodes carrying some risk appear in that count, so it is not a picture of the whole town, but it is the number that matters when the question is how many front doors are actually exposed.
On whether anything stands between the water and the house, about 11% of postcodes sit inside a modelled high-risk extent with a defence present in the model, and about 11% sit inside one without. Defended in this context means a structure exists in the modelling, not that the property is protected. Defences have design standards, and water does not read them.
At the nearest tide gauge, Devonport, the record from 1962 to 2015 shows sea level rising at about 2.35 millimetres a year. That is a measured historic rate at a coastal gauge rather than a forecast, and Beaminster is inland, so it belongs to the wider Dorset context rather than to the town's own doorstep.
The town's own recorded history is the encouraging part. No historic flood extent covers the area, and the record shows eight flood events, the most recent in November 2002. No recorded flooding across the mapped area is genuinely reassuring, though absence of a record is not the same as proof nothing ever happened.
Flood risk is the weakest thing about Beaminster, and the honest advice is to treat every individual address as an open question until the mapping and the survey say otherwise. Put the exact address into the Environment Agency's long-term flood-risk service, ask the seller for any claims history, and get an insurance quote before you commit.