Does E20 flood?

Yes — parts of the E20 district carry real flood risk: 2 of its 22 at-risk postcodes reach the Environment Agency's High likelihood band. The E20 postcode district covers Stratford Olympic Park, close to Stoke Newington, Walthamstow, Wanstead, and surrounding villages in parts of Greater London and Essex.

22 postcodes in the E20 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 2 high, 1 medium, 13 low, 6 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 E20 postcodes are at risk?

Rivers and flooding history near E20

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

Lea Bridge on the River Lee — 3.8 km away, highest on record 6.52m
Redbridge on the River Roding — 5 km away, highest on record 2.30m
Walthamstow on the Ching Brook — 6.6 km away, highest on record 4.76m
Chingford on the Ching Brook — 8.4 km away, highest on record 2.31m

150 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (5 at warning level or above), most recently 3 March 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

EA06JanuaryWinter2024 (2024) — about 4.1 km from the centre
January 2021 flooding — about 0.9 km from the centre
May 2020 flooding — about 1.9 km from the centre
October 2000 flooding — about 3.8 km from the centre

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

🏠 Buying or renting in E20? 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

E18 E17 E16 E15 E14 E13 E12 E11

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.