Does UB8 flood?

Yes — parts of the UB8 district carry real flood risk: 27 of its 104 at-risk postcodes reach the Environment Agency's High likelihood band. The UB8 postcode district covers Uxbridge, Colham & Cowley, Yiewsley, close to Cowley, Iver, Denham, and surrounding villages in parts of Greater London and Surrey.

104 postcodes in the UB8 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 27 high, 5 medium, 54 low, 18 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).

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Which UB8 postcodes are at risk?

UB8 1HS up to High UB8 1LZ up to High UB8 1PW up to High UB8 1PX up to High UB8 1UH up to High UB8 1UJ up to High UB8 2AE up to High UB8 2AF up to High UB8 2GT up to High UB8 2GU up to High UB8 2HU up to High UB8 2HW up to High UB8 2HX up to High UB8 2JR up to High UB8 2JU up to High UB8 2TE up to High UB8 2TW up to High UB8 2UB up to High UB8 2XB up to High UB8 2YF up to High UB8 2YJ up to High UB8 3NB up to High UB8 3ND up to High UB8 3NE up to High UB8 3PH up to High UB8 3PW up to High UB8 3SL up to High UB8 1JR up to Medium UB8 1WN up to Medium UB8 2JP up to Medium UB8 2TX up to Medium UB8 2UZ up to Medium UB8 1NA up to Low UB8 2BZ up to Low UB8 2DB up to Low UB8 2FA up to Low UB8 2FB up to Low UB8 2FG up to Low UB8 2GA up to Low UB8 2GN up to Low UB8 2HN up to Low UB8 2JD up to Low UB8 2JF up to Low UB8 2JG up to Low UB8 2JH up to Low UB8 2JJ up to Low UB8 2JT up to Low UB8 2LE up to Low UB8 2LF up to Low UB8 2LG up to Low UB8 2LH up to Low UB8 2LQ up to Low UB8 2QB up to Low UB8 2QD up to Low UB8 2QE up to Low UB8 2QL up to Low UB8 2QN up to Low UB8 2QS up to Low UB8 2QW up to Low UB8 2QY up to Low UB8 2RB up to Low UB8 2RD up to Low UB8 2RG up to Low UB8 2RP up to Low UB8 2RR up to Low UB8 2RW up to Low UB8 2UF up to Low UB8 2UG up to Low UB8 2UL up to Low UB8 2UR up to Low UB8 2UT up to Low UB8 2UX up to Low UB8 2WA up to Low UB8 2XD up to Low UB8 2XE up to Low UB8 2XF up to Low UB8 2XG up to Low UB8 2XH up to Low UB8 2XP up to Low UB8 2XQ up to Low UB8 2XS up to Low UB8 3PN up to Low UB8 3SG up to Low UB8 3SS up to Low UB8 3TB up to Low UB8 3TT up to Low UB8 2FT up to Very low UB8 2FX up to Very low UB8 2QA up to Very low UB8 2QT up to Very low UB8 2QU up to Very low UB8 2QX up to Very low UB8 2QZ up to Very low UB8 2RE up to Very low UB8 2RF up to Very low UB8 2RH up to Very low UB8 2RJ up to Very low UB8 2RQ up to Very low UB8 2RS up to Very low UB8 2RU up to Very low UB8 2RZ up to Very low UB8 2SA up to Very low UB8 2SP up to Very low UB8 2XX up to Very low

Rivers and flooding history near UB8

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

311 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (57 at warning level or above), most recently 28 August 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 UB8? 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

UB7 UB9 UB10 UB6 UB5 UB4 UB3 UB2

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.