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Does CB11 flood?

Yes — parts of the CB11 district carry real flood risk: 21 of its 55 at-risk postcodes reach the Environment Agency's High likelihood band. The CB11 postcode district covers Clavering, Newport, Littlebury, Chesterford & Wenden Lofts, Saffron Walden Shire, close to Great Chesterford, Furneux Pelham, Stansted Mountfitchet, and surrounding villages in parts of Essex and Hertfordshire.

55 postcodes in the CB11 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 21 high, 7 medium, 26 low, 1 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 CB11 postcodes are at risk?

CB11 3HS up to High CB11 3HZ up to High CB11 3LP up to High CB11 3LX up to High CB11 3PE up to High CB11 3PG up to High CB11 3PL up to High CB11 3PN up to High CB11 3RD up to High CB11 3TH up to High CB11 3TR up to High CB11 3UG up to High CB11 3XP up to High CB11 3XR up to High CB11 4HB up to High CB11 4JB up to High CB11 4JG up to High CB11 4JS up to High CB11 4TR up to High CB11 4UL up to High CB11 4UY up to High CB11 3RZ up to Medium CB11 4EZ up to Medium CB11 4JT up to Medium CB11 4JU up to Medium CB11 4LU up to Medium CB11 4QP up to Medium CB11 4XB up to Medium CB11 3AA up to Low CB11 3AE up to Low CB11 3AG up to Low CB11 3BJ up to Low CB11 3BQ up to Low CB11 3DD up to Low CB11 3ED up to Low CB11 3EG up to Low CB11 3JS up to Low CB11 3LR up to Low CB11 3LY up to Low CB11 3LZ up to Low CB11 3RG up to Low CB11 3RN up to Low CB11 3RW up to Low CB11 3UF up to Low CB11 4EY up to Low CB11 4HJ up to Low CB11 4JX up to Low CB11 4PU up to Low CB11 4QL up to Low CB11 4QR up to Low CB11 4QW up to Low CB11 4QX up to Low CB11 4SB up to Low CB11 4UJ up to Low CB11 4PE up to Very low

Rivers and flooding history near CB11

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

48 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (9 at warning level or above), most recently 16 February 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 CB11? 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

CB10 CB9 CB8 CB7 CB6 CB5 CB4 CB3

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.