Fitzrovia has no river or sea flood risk at all. None of its postcodes are in the Environment Agency's flood zones. None stay at high risk once climate change is allowed for. There is no recorded history of flooding. The risk that does exist is heavy rain on the pavements and roofs, and it affects a minority of postcodes.
The Environment Agency's river-and-sea flood zones cover 0% of Fitzrovia's postcodes in zone 3, the highest-probability band, and 0% in zone 2, the medium-probability fringe around it. The two bands don't overlap, and here both are empty. The nearest open water of any size is about a kilometre away, so a river would have to travel a long way to reach these streets.
The realistic threat is surface water. In a district this built-up, almost every surface is roof, road or pavement, so heavy rain has to run into the drains, and when the drains are full it collects in the lowest places it can find. In streets of old terraces turned into flats, that often means a lower-ground flat. If the home you are looking at has steps down to its front door, look up that exact postcode on the Environment Agency's surface-water map before booking a survey.
The Environment Agency's climate-adjusted flood zones also cover 0% of the area. Even after allowing for heavier rain and higher river flows, the river-and-sea picture stays empty.
Insurance should be routine for most homes here. Insurers price river and sea risk heavily, and Fitzrovia has none, so a typical upstairs flat should get standard cover. A basement or lower-ground flat on one of the postcodes flagged for surface water may face more questions, and the insurer will look up the postcode, not the district.
There is a second, broader measure. It counts any postcode flagged on at least one of several flood indicators, surface water included. On that measure, about 8% of Fitzrovia's postcodes are rated high risk, 4% medium and 10% low. Almost all of that comes from rain with nowhere to drain, since the river and sea zones are empty.
The Environment Agency's modelled flood extents put 0% of postcodes at high risk without defences and 0% at high risk with defences. There is no flood plain here for a defence to protect against, so the question of whether a wall is holding the water back doesn't come up.
The nearest tide gauge with a long record is at Portsmouth, which recorded sea levels rising by about 2 millimetres a year between 1962 and 2023. That is the rate measured on the coast of Hampshire, and it has little bearing on a district whose nearest water is a kilometre away.
There is no recorded flooding in the area. That is reassuring, although the records can only include floods that someone reported, and a flooded basement in a back street can go unrecorded.
Fitzrovia is about average on flood risk. Rivers and sea are no concern at all. A minority of postcodes are flagged for surface water, and anyone buying a basement flat on one of them should take that seriously.