Yes, in patches, and the patches are the whole story. Two streams off the moor run through the town to meet the Dart at its eastern edge. About a quarter of postcodes carry a high rating on at least one flood measure. One in ten sits in the highest river flood zone. The town does not flood; particular streets do, and knowing which ones is the difference between a fine house and an annual argument with an insurer.
The Environment Agency's river-and-sea mapping puts about 10% of the area's postcodes in flood zone 3, the highest-probability band, and a further 6% in flood zone 2, the medium-probability fringe that sits outside zone 3 rather than around it. Those two bands are separate, not nested, so the honest reading is that roughly one postcode in six carries a mapped river flood designation of some kind.
Surface water is the harder risk to see and the one that actually shows up in the record here. Four flood events are logged for the area, the most recent in November 2012, when an ordinary watercourse with no raised defences simply exceeded its channel capacity. About 2.5% of postcodes carry a recorded historic flood. A town built where two moor streams converge collects water quickly after rain on high ground, which is a matter of topography rather than misfortune.
Looking forward, the climate-adjusted extent widens the picture to about 18% of postcodes. That is the mapped allowance for a wetter future rather than a prediction of any particular winter, and it means a number of properties currently outside the designated zones sit inside the version of the map that planning decisions will increasingly be made against.
For insurance, this is the kind of risk profile that gets priced rather than refused. A mapped zone 3 address, or one with a flood on its record, will attract questions, a higher excess, and in some cases a requirement for evidence of resilience work before cover is written. The practical move is to get an indicative quote for the specific address before instructing a solicitor, because the difference between two houses on the same street can be substantial and nobody selling the house is obliged to volunteer it.
Combining every indicator, including surface water alongside rivers, about 24% of the area's postcodes rate high on at least one measure, 15% medium and 38% low. Those bands overlap with the river zone figures rather than adding to them, because a single postcode can appear in both.
Counted as homes rather than postcodes, the Environment Agency's rivers-and-sea mapping lists 1,242 properties across the postcodes that carry any risk at all, of which 148 are at high risk, 71 at medium and 297 at low, with 72 of the high-risk ones residential. Postcodes with no risk do not appear in that list, so this is the affected slice of the town rather than the whole of it.
On defences, about 9% of postcodes fall inside a high-risk extent with no defence present in the model, against about 7% where a defence is present. That second figure is not reassurance. It means the model knows a structure is there, not that the structure will hold, and not that the house behind it is dry.
Shoreline policy is background here rather than the main event, since the area sits about four kilometres from the coast at its nearest point and closer to eight at the typical postcode. Where a shoreline management plan applies, and it covers about 87% of postcodes, the stated policy is to hold the line at the twenty, fifty and hundred-year horizons. A policy is an intention to maintain defences over that period, not a promise and not a defence that already exists.
The nearest long tide record, at Devonport, shows sea level rising by about 2.35 millimetres a year across measurements taken between 1962 and 2015. That is what the gauge recorded over that period rather than a forecast for the next one.
Of everything this town has going for it, flooding is the clear weak spot: not a technicality, not evenly spread, and the one thing worth checking street by street before anything else about a property matters.