Does WD17 flood?

Yes — parts of the WD17 district carry real flood risk: 9 of its 26 at-risk postcodes reach the Environment Agency's High likelihood band. The WD17 postcode district covers Park, Oxhey, close to Watford, Croxley Green, Rickmansworth, and surrounding villages in parts of Greater London and Hertfordshire.

26 postcodes in the WD17 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 9 high, 15 medium, 2 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 WD17 postcodes are at risk?

Rivers and flooding history near WD17

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

Croxley Green on the River Gade — 3.1 km away, highest on record 0.42m
Moor Lane on the River Colne — 4 km away, highest on record 8.23m
Woodhall Avenue on the River Pinn — 5.8 km away, highest on record 0.82m
Waxwell Lane on the River Pinn — 5.8 km away, highest on record 1.41m

211 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (17 at warning level or above), most recently 28 August 2026. Warnings cover flood areas, not individual addresses.

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

January 2021 flooding — about 1.7 km from the centre
February 2014 flooding — about 0.8 km from the centre
Winter 2013/2014 (2013) — about 35.3 km from the centre
February 2009 flooding — about 3.6 km from the centre

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

🏠 Buying or renting in WD17? 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

WD18 WD19 WD23 WD24 WD25 WD7 WD6 WD4

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.