If Yelverton floods, the water will have arrived from the sky. None of it sits in a river or sea flood zone. None of it appears in a recorded flood extent. About one postcode in twenty carries a high flag once rain running off the moor is counted in. That last group is the only part of this a buyer needs to think about.
Start with rivers and the sea, because that is the mapping conveyancers and insurers reach for first. In the Environment Agency's flood zones, zero percent of the area's postcodes fall in zone 3 and zero percent in zone 2. Those two are separate bands rather than one inside the other: zone 3 is the higher-probability core, and zone 2 is the medium-probability fringe sitting beyond it, so a smaller zone 2 figure elsewhere is not a contradiction. Here both read empty, and empty is empty.
What is left is rainfall. Every bit of flood risk registering in this area comes through the surface-water and drainage indicators rather than through any watercourse mapped as a zone, and on those indicators about 4% of postcodes come out high. Surface water is the risk that does not care about the shape of a river, only about where a road, a yard and a blocked gully send water in twenty minutes of heavy rain.
The forward look agrees with the current one. The climate-adjusted version of the zone mapping, which builds in allowances for future rainfall and sea level, also puts zero percent of postcodes here in a flood zone. Nothing crosses into the zones under that allowance.
For insurance, that combination is about as easy as a Devon postcode gets. A clean zone record is the first thing an underwriter reads, so ordinary cover at ordinary terms is the reasonable expectation. The exceptions live in the surface-water flags: an address inside one can still attract a loaded premium or a flood-specific excess, and no area-level answer settles that for a particular house. The quote is the test, not the map.
Taking the broader postcode indicators, which fold surface water in alongside rivers and sea and flag a postcode on any single measure, about 4% of the 68 postcodes covered rate high, about 3% medium and about 29% low. Those bands overlap the zone figures rather than adding to them. A postcode can sit outside every river-and-sea zone and still carry a high flag from rainwater, which is precisely what is happening here.
On the modelled flood extents, across 70 postcodes, zero percent sit in a high-risk extent with a defence present in the model, and zero percent sit in one without. There is nothing here for a defence to stand in front of. The distinction still matters when reading flood mapping elsewhere: a property described as defended simply has a defence somewhere in the model, which is not the same as being safe behind it.
Every postcode here falls inside a shoreline management plan area, and the plan's stated policy over the next twenty, fifty and hundred years is no active intervention, meaning no commitment to build or maintain coastal defences on that stretch. A policy is an intention rather than a guarantee, and it does not describe a defence that already exists. In this case it is paperwork more than geography: the nearest coast is about 3,500 metres away at the closest point, typically about 5,500 metres, and no postcode comes within 500 metres of it.
The nearest tide gauge, at Devonport, measured sea level rising about 2.35 millimetres a year across its record from 1962 to 2015. That is a historic rate over that period rather than a projection, and at this distance inland it is background reading.
Nothing in the area falls inside a recorded historic flood extent, zero percent of it. Records only hold what was mapped and reported, so that is real reassurance rather than proof that no lane has ever run like a stream during a bad November.
Flooding belongs on the short list of things Yelverton genuinely gets right: no zones, no recorded history, no defences to depend on, and about one postcode in twenty where the only live question is where the rain goes next.