Does UB4 flood?

Yes — parts of the UB4 district carry real flood risk: 18 of its 63 at-risk postcodes reach the Environment Agency's High likelihood band. The UB4 postcode district covers Belmore, Yeading, Charville, Wood End, close to Southall, Hillingdon, Northolt, and surrounding villages in parts of Greater London and Surrey.

63 postcodes in the UB4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 18 high, 3 medium, 35 low, 7 very low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which UB4 postcodes are at risk?

UB4 0BH up to High UB4 0BP up to High UB4 0EG up to High UB4 0EQ up to High UB4 0JZ up to High UB4 0NG up to High UB4 8DD up to High UB4 8PA up to High UB4 9AA up to High UB4 9AG up to High UB4 9AH up to High UB4 9AQ up to High UB4 9EL up to High UB4 9EN up to High UB4 9EP up to High UB4 9ER up to High UB4 9HP up to High UB4 9UZ up to High UB4 0EF up to Medium UB4 9AE up to Medium UB4 9AJ up to Medium UB4 0DG up to Low UB4 0ER up to Low UB4 0ES up to Low UB4 0HA up to Low UB4 0LY up to Low UB4 0LZ up to Low UB4 0NA up to Low UB4 0NB up to Low UB4 0ND up to Low UB4 0NH up to Low UB4 0NJ up to Low UB4 0NL up to Low UB4 0NN up to Low UB4 0NP up to Low UB4 0NQ up to Low UB4 0NR up to Low UB4 0NS up to Low UB4 0PA up to Low UB4 0PB up to Low UB4 0PL up to Low UB4 0PW up to Low UB4 0XP up to Low UB4 0XR up to Low UB4 0XS up to Low UB4 0XT up to Low UB4 0XU up to Low UB4 8NJ up to Low UB4 9AD up to Low UB4 9AT up to Low UB4 9AU up to Low UB4 9AX up to Low UB4 9AY up to Low UB4 9BB up to Low UB4 9DG up to Low UB4 9JE up to Low UB4 0JJ up to Very low UB4 0JW up to Very low UB4 0NU up to Very low UB4 0NY up to Very low UB4 8BZ up to Very low UB4 9AL up to Very low UB4 9TA up to Very low

Rivers and flooding history near UB4

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

1,270 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (26 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):

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

🏠 Buying or renting in UB4? 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

UB3 UB5 UB2 UB6 UB1 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.