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Does WD3 flood?

Yes — parts of the WD3 district carry real flood risk: 70 of its 123 at-risk postcodes reach the Environment Agency's High likelihood band. The WD3 postcode district covers Chorleywood South & Maple Cross, Harefield Village, Dickinsons, close to Rickmansworth, Croxley Green, Howletts Lane, and surrounding villages in parts of Greater London and Hertfordshire.

123 postcodes in the WD3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 70 high, 14 medium, 32 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).

Free preview first · full report £19

Which WD3 postcodes are at risk?

WD3 1BS up to High WD3 1DD up to High WD3 1DE up to High WD3 1DF up to High WD3 1DH up to High WD3 1DJ up to High WD3 1DN up to High WD3 1DP up to High WD3 1DQ up to High WD3 1DT up to High WD3 1DW up to High WD3 1FR up to High WD3 1GF up to High WD3 1GG up to High WD3 1HA up to High WD3 1HD up to High WD3 1HE up to High WD3 1JA up to High WD3 1JE up to High WD3 1JJ up to High WD3 1JW up to High WD3 1JY up to High WD3 1LA up to High WD3 1LB up to High WD3 1LE up to High WD3 1LF up to High WD3 1LP up to High WD3 1LR up to High WD3 1LU up to High WD3 1LX up to High WD3 1LY up to High WD3 1LZ up to High WD3 1NA up to High WD3 1NB up to High WD3 1ND up to High WD3 1NE up to High WD3 1NF up to High WD3 1NG up to High WD3 1NQ up to High WD3 1NS up to High WD3 1NU up to High WD3 1NX up to High WD3 1NZ up to High WD3 1QE up to High WD3 1SZ up to High WD3 1TA up to High WD3 2UX up to High WD3 3AD up to High WD3 3BG up to High WD3 3BQ up to High WD3 3EW up to High WD3 3GG up to High WD3 5SS up to High WD3 6HA up to High WD3 8DS up to High WD3 8FE up to High WD3 8UE up to High WD3 8UF up to High WD3 8UR up to High WD3 8UT up to High WD3 8UW up to High WD3 8UX up to High WD3 8UZ up to High WD3 8XD up to High WD3 9SQ up to High WD3 9XJ up to High WD3 9XS up to High WD3 9XY up to High WD3 9YB up to High WD3 9YD up to High WD3 1BP up to Medium WD3 1ED up to Medium WD3 1EY up to Medium WD3 1FS up to Medium WD3 1HB up to Medium WD3 1HG up to Medium WD3 1JB up to Medium WD3 1JQ up to Medium WD3 1NH up to Medium WD3 1NP up to Medium WD3 9WZ up to Medium WD3 9XT up to Medium WD3 9XU up to Medium WD3 9XX up to Medium WD3 1AN up to Low WD3 1AZ up to Low WD3 1BJ up to Low WD3 1BL up to Low WD3 1BN up to Low WD3 1BQ up to Low WD3 1BX up to Low WD3 1DB up to Low WD3 1DR up to Low WD3 1DS up to Low WD3 1EQ up to Low WD3 1FU up to Low WD3 1GH up to Low WD3 1GR up to Low WD3 1HH up to Low WD3 1HJ up to Low WD3 1HP up to Low WD3 1HT up to Low WD3 1HU up to Low WD3 1HW up to Low WD3 1JF up to Low WD3 3AB up to Low WD3 3RT up to Low WD3 3RU up to Low WD3 6EU up to Low WD3 6HB up to Low WD3 7DH up to Low WD3 8YY up to Low WD3 9AD up to Low WD3 9XR up to Low WD3 9XZ up to Low WD3 9YA up to Low WD3 1AT up to Very low WD3 1BE up to Very low WD3 1BH up to Very low WD3 1DX up to Very low WD3 1EF up to Very low WD3 9SN up to Very low WD3 9YS up to Very low

Rivers and flooding history near WD3

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

208 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (14 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):

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

🏠 Buying or renting in WD3? 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

WD4 WD6 WD7 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.