Parts of it, yes. Most of it, no. A small share of postcodes sit inside the river-and-sea flood zones, and roughly one in ten carry a high rating on at least one flood measure. The number of homes actually mapped at high risk fits comfortably in a single sentence. This is a question about a specific address, not about a town, and anyone answering it at town level is answering the wrong question.
Taking rivers and sea first: about 5% of Chudleigh postcodes fall inside the Environment Agency's flood zone 2 and about 2% inside zone 3. Those bands are exclusive rather than nested. Zone 3 is the higher-probability core and zone 2 is the medium-probability fringe sitting outside it, so the smaller figure is the more serious one, and anyone reading zone 2 as the bigger worry has it backwards.
Neither of those zones says anything about water coming off ground and down a road, which in a valley town is the version residents are more likely to meet. The Environment Agency's records list eight historic flood events for the area, the most recent one logged as channel capacity exceeded on an ordinary watercourse with no raised defences, which is the technical phrasing for a small stream filling up and going where it liked. About 8% of postcodes carry a recorded historic flood of some kind.
Looking forward, about 7% of postcodes fall inside the Environment Agency's climate-adjusted zone, the allowance made for a wetter future. It is a modelled band rather than a prediction of a particular flood, and it is the figure that matters most to anyone expecting to still hold the deeds in thirty years.
For insurance, the address is what gets priced, not the town. A house inside zone 3, or one flagged on the surface-water side, can attract higher premiums and heavier excesses, and previous claims on the property follow it to the next owner. The sensible order is to get an indicative quote before instructing a solicitor, rather than discovering the number after the survey has been paid for.
Pulled together across all measures, about 11% of Chudleigh postcodes carry a high rating on at least one flood indicator, about 7% a medium rating and about a quarter a low one. That combined measure folds surface water in alongside rivers and sea, so it overlaps with the zone shares above rather than adding to them. Two different lenses on the same town, not two separate problems.
The count of homes is the more useful number. Only postcodes carrying some risk appear in the Environment Agency's rivers-and-sea property mapping at all, and eight Chudleigh postcodes do. Across the 244 properties covered in those postcodes, 8 are mapped at high risk, four of them residential, with 3 at medium risk, 5 at low and 45 at very low. Small numbers, but not zero, and being one of the eight is not improved by the other 236 being fine.
On whether anything stands between the water and the building: about 2% of postcodes sit inside a modelled high-risk extent with no defence present in the model, against about 1% inside a high-risk extent where a defence is present. A defence appearing in a model means it has been mapped, not that it will hold, and not that the property behind it is safe. It changes the modelled scenario, not the weather.
Shoreline policy applies here in the background rather than the foreground, since the nearest coast is about six kilometres away, but every postcode is covered by a shoreline management plan. The stated policy is to hold the line over the next twenty years, shifting to managed realignment over the fifty and hundred year horizons. That is an intention to maintain defences for a period, published by the people who would have to fund it, rather than a promise or a structure that already exists.
The longer measurement behind all of this comes from the tide gauge at Devonport, where the record from 1962 to 2015 shows sea level rising at about 2.35 millimetres a year. That is a measured historic rate over that period, not a forecast of what the next fifty years do.
Flood risk here sits in the middle: fine for most of the town, genuinely serious for a small number of addresses near the water, and impossible to settle from a postcode search alone. Put the exact address into the Environment Agency's long-term flood risk tool before making an offer, and treat the answer for the house next door as irrelevant.