Does UB1 flood?

Yes — parts of the UB1 district carry real flood risk: 1 of its 5 at-risk postcodes reach the Environment Agency's High likelihood band. The UB1 postcode district covers Norwood Green, Lady Margaret, Dormers Wells, close to Greenford, Southall, Brentford, and surrounding villages in parts of Greater London and Surrey.

5 postcodes in the UB1 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 1 high, 4 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which UB1 postcodes are at risk?

UB1 3EE up to High UB1 3ER up to Low UB1 3ES up to Low UB1 3ET up to Low UB1 3HW up to Low

Rivers and flooding history near UB1

The rivers that matter here, each monitored live on FloodRadar:

Hanwell on the River Brent — 0.7 km away, highest on record 2.73m
Greenford, Costons Lane on the River Brent — 1.7 km away, highest on record 1.75m
Yeading, Brookside Road on the Yeading Brook — 2.9 km away, highest on record 1.36m
Cranford Park on the River Crane — 5 km away, highest on record 2.64m

1,230 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (21 at warning level or above), most recently 29 September 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

Winter 2013/2014 (2013) — about 13.8 km from the centre
May 2010 flooding — about 1.9 km from the centre
November 2009 flooding — about 1.8 km from the centre
May 1988 flooding — about 8 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in UB1? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

UB2 UB3 UB4 UB5 UB6 UB7 UB8 UB9

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.