Does WD7 flood?

Yes — parts of the WD7 district carry real flood risk: 11 of its 28 at-risk postcodes reach the Environment Agency's High likelihood band. The WD7 postcode district covers Aldenham East, Aldenham West, close to Radlett, Colney Street, Green Street, and surrounding villages in parts of England and Hertfordshire.

28 postcodes in the WD7 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 11 high, 7 medium, 3 low, 7 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 WD7 postcodes are at risk?

WD7 7AL up to High WD7 7DF up to High WD7 7DH up to High WD7 7DL up to High WD7 7FD up to High WD7 7HL up to High WD7 7HN up to High WD7 7HS up to High WD7 7JG up to High WD7 8ER up to High WD7 8ES up to High WD7 7AP up to Medium WD7 7BG up to Medium WD7 7EA up to Medium WD7 7LA up to Medium WD7 7LB up to Medium WD7 7LD up to Medium WD7 8EW up to Medium WD7 7AQ up to Low WD7 7GW up to Low WD7 7LT up to Low WD7 7AJ up to Very low WD7 7AR up to Very low WD7 7GX up to Very low WD7 7GZ up to Very low WD7 7NQ up to Very low WD7 7NR up to Very low WD7 8BE up to Very low

Rivers and flooding history near WD7

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

Radlett on the Radlett Brook — 0.8 km away, highest on record 1.60m
Colney Street on the River Ver — 2.1 km away, highest on record 0.56m
Borehamwood on the Borehamwood Brook — 3.1 km away, highest on record 2.22m
London Colney on the River Colne — 4 km away, highest on record 2.72m

162 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (12 at warning level or above), most recently 27 August 2026. Warnings cover flood areas, not individual addresses.

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

February 2014 flooding — about 3.2 km from the centre
Winter 2013/2014 (2013) — about 41.4 km from the centre
June 2012 flooding — about 3.2 km from the centre
January 2011 flooding — about 3.2 km from the centre

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

🏠 Buying or renting in WD7? 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

WD6 WD4 WD3 WD17 WD18 WD19 WD23 WD24

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.