Fairford is mostly dry, but it has a wet edge along the River Coln that buyers should take seriously. Most of the town is outside the river flood zones. The streets nearest the water carry real risk. Heavy rain has flooded homes here before. Which side of that line a house falls on matters far more than any figure for the whole town.
On the Environment Agency's river-and-sea mapping, about 7% of Fairford's postcodes are in flood zone 3, the highest-probability band. Another 2% are in zone 2, the medium-probability fringe outside it. Everything else is in the lowest band. The Coln gave Fairford its mills and its wool trade, and it still floods a narrow strip of the town now and then.
Surface water is part of the town's record too. The Environment Agency has recorded seven flood events for the area, and about 5% of postcodes have a recorded flood history. The most recent event, in July 2007, was logged against the main river, but the cause was local drainage and surface water, and homes on Milton Street and London Street flooded. Anyone buying on either street should ask the seller directly whether the house flooded that summer and what was done to it afterwards.
The Environment Agency also models how the flood zones change once climate change is allowed for, and on that basis about 16% of Fairford's postcodes fall inside them.
For insurance, the mapping does a lot of the deciding. Insurers price from the flood maps, so a house in the riverside zones can cost noticeably more to cover. A house a few streets back may cost no more than anywhere else in the Cotswolds.
A wider measure counts a postcode if it rates on any one of several measures, surface water included as well as rivers. On that basis about 12% of Fairford's postcodes rate high on at least one measure, 18% medium and 39% low. That is a broader net than the river zones, which is why the shares are bigger.
Counting houses gives a clearer picture than counting postcodes. The Environment Agency's rivers-and-sea register lists 437 properties across the 19 Fairford postcodes that carry any risk at all, and postcodes with no risk are not listed. Of those 437 properties, 57 are at high risk, 62 medium, 72 low and 15 very low. Of the high-risk properties, 54 are homes.
Flood defences cover about half of that risk. About 9% of postcodes are inside the high-risk flood area with no defence in the model, and just under 9% are inside it with a defence modelled. "Defended" only means the model includes a defence. It is a fact about the defence, and it tells you nothing about whether your kitchen stays dry.
The nearest tide gauge is at Portsmouth, where sea level rose by about 2 millimetres a year over its record from 1962 to 2023. Fairford is a long way from Portsmouth. The sea is the one flood risk this town can mostly leave to coastal towns.
Fairford's flood risk is middling overall. Most of the town is well clear of the water, but the risk is concentrated in a strip beside the Coln, and the house you choose decides which side of it you are on.