Yes, in parts, and the parts matter far more than the village average. About one in four postcodes rates high on at least one flood measure. Roughly one in seven of the area sits in the highest river-and-sea flood zone. Most homes sit outside both. Norton Fitzwarren is not a flooding village so much as a village containing flooding streets, and those are two entirely different purchases.
On the Environment Agency's river-and-sea mapping, about 14% of the area's postcodes fall inside flood zone 3, the highest-probability band, and about 8% inside flood zone 2. Those two bands are exclusive rather than nested: zone 2 is the additional medium-probability fringe lying beyond zone 3, not a bigger ring containing it. So the eight is a separate slice of the village, not a restatement of the fourteen.
Surface water is the part nobody maps neatly. There is no separate surface-water-only figure published for the village here; it sits folded inside the combined postcode indicator further down. What is worth knowing is that surface water ignores flood zones entirely, and that the village occupies the southern slope below Norton Camp. Water arriving off a slope has firm views about where it goes, and those views are rarely recorded on a title deed.
Looking forward, about 32% of postcodes fall inside the modelled flood extent once the climate allowance is applied. That is the Environment Agency's own adjusted scenario rather than a forecast of any particular winter, and it roughly doubles the footprint of the current zone three. Anyone buying for the long term should read that number as the one their eventual buyer will be reading.
For insurance, the practical effect is that insurers price the address, not the village. A quiet postcode a few hundred metres away is no help at all when the quote comes back. Get an indicative buildings quote before instructing a solicitor rather than after, because the moment cover becomes expensive or conditional is the moment the sale arithmetic changes, and finding that out at exchange is an expensive way to learn it.
Across all 66 postcodes, about 24% rate high on at least one flood measure, about 23% medium and about 44% low. That combined indicator folds surface water in alongside rivers and sea, so it overlaps with the zone shares rather than adding to them. Two different measures of the same wet ground, counted differently, and neither is a description of your particular front door.
Counted as homes rather than percentages, the picture calms down. Nineteen postcodes carry any river or sea risk at all, and those contain 664 properties, of which 15 are rated high risk, 10 medium and 70 low, with 227 very low. Eight of the high-risk properties are residential. That is a small, identifiable set of addresses rather than a village-wide condition, which is precisely why an address-level check beats a postcode-level reassurance.
On whether anything stands between the water and the house, about 15% of postcodes sit inside a modelled high-risk extent with no defence present, against about 11% where the model includes one. Defence present is not the same as house safe: it means the model knows a structure exists, not that it will hold or that it was built for the flow arriving. Six flood events are on record locally, the most recent in January 1999, when a main river exceeded its channel capacity in a stretch with no raised defences. The water did not consult the modelling first.
The nearest long-running tide gauge, at Devonport, recorded sea level rising about 2.35 millimetres a year across its 1962 to 2015 record. That is a measured historic rate at a coastal gauge some distance away rather than a forecast for this village, and it belongs in the background of the picture rather than the foreground.
Flooding is the weakest thing about Norton Fitzwarren, and the only part of buying here that genuinely deserves a professional opinion. The village is fine. A handful of its addresses are not, and no amount of village-level statistics will tell you which one you are standing in.