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Does EN11 flood?

Yes — parts of the EN11 district carry real flood risk: 24 of its 48 at-risk postcodes reach the Environment Agency's High likelihood band. The EN11 postcode district covers Broxbourne and Hoddesdon South, Great Amwell & Stansteads, close to Roydon, Hoddesdon, Lower Nazeing, and surrounding villages in parts of Essex and Hertfordshire.

48 postcodes in the EN11 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 24 high, 8 medium, 11 low, 5 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 EN11 postcodes are at risk?

EN11 0AA up to High EN11 0AB up to High EN11 0AD up to High EN11 0AS up to High EN11 0AT up to High EN11 0AZ up to High EN11 0BA up to High EN11 0BB up to High EN11 0BD up to High EN11 0BE up to High EN11 0BG up to High EN11 0BH up to High EN11 0BQ up to High EN11 0BT up to High EN11 0BW up to High EN11 0DJ up to High EN11 0EH up to High EN11 0EQ up to High EN11 0FA up to High EN11 0FB up to High EN11 0HB up to High EN11 0QH up to High EN11 0QR up to High EN11 0RF up to High EN11 0AE up to Medium EN11 0AY up to Medium EN11 0DY up to Medium EN11 0EW up to Medium EN11 0EZ up to Medium EN11 0HH up to Medium EN11 0QU up to Medium EN11 0QX up to Medium EN11 0BJ up to Low EN11 0DN up to Low EN11 0DU up to Low EN11 0GL up to Low EN11 0NT up to Low EN11 0NX up to Low EN11 8AF up to Low EN11 8AQ up to Low EN11 8AZ up to Low EN11 8BA up to Low EN11 8HX up to Low EN11 0BU up to Very low EN11 0DE up to Very low EN11 0DR up to Very low EN11 0QS up to Very low EN11 0WZ up to Very low

Rivers and flooding history near EN11

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

49 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (10 at warning level or above), most recently 15 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 EN11? 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

EN10 EN9 EN8 EN7 EN6 EN5 EN4 EN3

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.