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Does CM77 flood?

Yes — parts of the CM77 district carry real flood risk: 12 of its 22 at-risk postcodes reach the Environment Agency's High likelihood band. The CM77 postcode district covers Coggeshall, Rayne, Silver End & Cressing, Braintree West, close to Stisted, Witham, Rivenhall End, and surrounding villages in Essex.

22 postcodes in the CM77 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 12 high, 4 medium, 6 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 CM77 postcodes are at risk?

CM77 6BA up to High CM77 6DN up to High CM77 6SG up to High CM77 8AG up to High CM77 8AP up to High CM77 8ED up to High CM77 8EE up to High CM77 8EU up to High CM77 8FR up to High CM77 8PH up to High CM77 8PN up to High CM77 8PQ up to High CM77 6BU up to Medium CM77 6BZ up to Medium CM77 6DE up to Medium CM77 8DQ up to Medium CM77 6GE up to Low CM77 6SF up to Low CM77 8EG up to Low CM77 8NS up to Low CM77 8NW up to Low CM77 8RS up to Low

Rivers and flooding history near CM77

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

71 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (24 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 CM77? 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

CM24 CM23 CM22 CM21 CM20 CM19 CM18 CM17

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.