Camborne is at low risk of flooding by the standards of anywhere in Cornwall, which is largely the reward for being built on a granite hill rather than an estuary. Almost none of the town sits in a river or sea flood zone. Nothing here has a recorded flood history. The coast is a couple of miles away and downhill in every direction. Where water is a problem in this town, it is water arriving from the sky and the slope, not from the sea.
On river and sea flooding, the Environment Agency's zones barely register here. None of the area's postcodes fall in flood zone 2, the medium-probability fringe, and under 1% sit in flood zone 3, the higher-probability core. Those two zones are separate bands rather than one inside the other, so a zero in zone 2 alongside a small figure in zone 3 is not a contradiction: it means the handful of at-risk postcodes sit in the tighter inner band with no wider fringe around them. Practically, the river and sea question is settled for the overwhelming majority of the town.
Surface water is the one that matters more here, and the brief's postcode indicators do not split it out from the other sources, so it sits folded inside the combined risk picture below. The geography explains why it deserves attention. Small streams run south to north off the Carn Brea and Carnmenellis granite upland through narrow valleys cut deep by centuries of tin streaming, the Red River valley at Tuckingmill among them. Steep ground, hard granite and old industrial workings are an efficient way of moving rainfall downhill fast.
Looking forward, the climate-adjusted flood zone share stays at under 1% of postcodes, the same as the present-day zone 3 figure. The Environment Agency's allowance for future conditions does not materially widen the river and sea footprint across this area.
For insurance, that combination is straightforward for most buyers and awkward for a few. The great majority of Camborne addresses carry no meaningful river or sea flood flag, so cover should be priced without drama. For the minority inside a flagged postcode, expect the insurer to ask questions, expect a higher excess on flood specifically, and get an indicative quote before you are committed rather than after.
Taking every indicator together, including surface water, about 12% of postcodes rate high on at least one flood measure, roughly 17% rate medium and around 39% rate low. Those bands overlap with the zone figures above rather than adding to them, and they describe postcodes rather than individual homes. A postcode carrying a high rating on one indicator can still contain houses that sit well clear of the problem.
Counted as properties, the Environment Agency's rivers and sea mapping lists 129 properties across the six postcodes that carry any risk at all. Of those, 63 are rated high risk, with 52 of them residential, and three each fall at medium and low. Postcodes with no risk do not appear in that list, which is why the total is small: this is not a town-wide figure, it is the affected fringe.
On defences, under 1% of postcodes sit inside a modelled high-risk extent with a defence present, and under 1% sit inside one without. A defence appearing in the model means a structure exists in the mapping, not that the house behind it is protected to any particular standard, and it should never be read as an all-clear.
The whole area is covered by a shoreline management plan, and the stated policy for the nearest coast is no active intervention across the twenty, fifty and hundred year horizons. That is an intention not to maintain or build defences on that stretch, rather than a defence being removed, and it applies to the parish's northern coastline rather than the town, where the nearest postcode sits around 2.6 kilometres inland and none falls within 500 metres of the shore.
At the nearest tide gauge, Devonport, sea level rose at about 2.4 millimetres a year across the record from 1962 to 2015. That is a measured historic rate over half a century, not a projection.
No historic flooding is recorded anywhere in the area. That is genuinely reassuring, and it is also a record of what has been reported and logged rather than proof that no water has ever come through a door here.
Flood risk in Camborne is ordinary rather than reassuring or alarming: the sea and rivers are close to a non-issue, while surface water gives a real minority of postcodes something to check. The address matters far more than the town does, so put the exact one into the Environment Agency's long-term flood risk tool before you decide anything.