Yes. Edgware's flood risk comes from rain more than from rivers, and that is the risk most buyers forget to check. The river zones cover only a thin strip. Nearly a third of postcodes rate high on at least one flood measure. A few hundred properties carry a high river risk on their own. On most Edgware streets the problem is water coming down the hill, not up from a riverbank.
On the Environment Agency's river-and-sea mapping, about 4% of Edgware's postcodes are in flood zone 3, the highest-probability band, and about another 4% are in zone 2, the medium-probability fringe beyond it. The water that does the damage runs in small brooks. The Deans Brook and the Edgware Brook meet near Edgware Hospital to form the Silk Stream, which runs on to the River Brent at Brent Reservoir. The Environment Agency has 27 recorded flood events here, the latest in December 1992, when a main river overflowed its channel with no raised defences to hold it back. The Silk Stream is a modest name for something with that much paperwork behind it.
Surface water is the part the river zones leave out: rain that arrives faster than drains and brooks can take it away. Much of Edgware is steep, especially around Edgwarebury Park and the Broadfields Estate, and steep streets carry rain quickly to the streets below them.
The Environment Agency's climate-adjusted mapping widens the river zone to about 8% of postcodes. That shows where the zone would reach under the Agency's climate allowance, and it is a model, not a date anyone has set.
Insurers price individual addresses, not the town, and a high flag on any measure will show up in the quote. Get an insurance quote for the exact property early, while it can still change your offer.
The postcode-level picture is wider because it counts several measures, surface water among them, and flags a postcode if any one of them rates it. On that basis about 30% of Edgware's postcodes are high on at least one measure, about 26% medium and about 42% low. "Low" here means a small chance each year, which is not the same as no chance.
Counting buildings instead of postcodes, the Environment Agency's rivers-and-sea mapping lists 3,592 properties across Edgware's postcodes that carry some risk. Of those, 382 are at high risk, 263 at medium, 1,161 at low and 99 at very low, and 293 of the high-risk properties are homes. Postcodes with no river risk at all are left off that list entirely.
On the question of defences, about 4% of Edgware's postcodes sit inside the high-risk river extent with no defence in the model, against about 2% where a defence is present. A defence appearing in the model means a wall or channel is recorded there. It says nothing about how the house behind it will fare.
The nearest tide gauge is at Portsmouth, where sea level rose by about 2 millimetres a year between 1962 and 2023. Edgware is a long way from any coastline, so the sea is the one flood source nobody here needs to lose sleep over.
Edgware's flood record is poor. The risk mostly comes down the hill as rainwater, and it falls on enough streets to be a factor in almost any purchase here.