Does HP5 flood?

Yes — parts of the HP5 district carry real flood risk: 51 of its 78 at-risk postcodes reach the Environment Agency's High likelihood band. The HP5 postcode district covers Chalfont St Giles & Little Chalfont, Bovingdon, Flaunden and Chipperfield, close to Chesham, Little Missenden, Hemel Hempstead, and surrounding villages in parts of Hertfordshire and Buckinghamshire.

78 postcodes in the HP5 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 51 high, 11 medium, 16 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 HP5 postcodes are at risk?

HP5 1BG up to High HP5 1BJ up to High HP5 1BP up to High HP5 1BW up to High HP5 1BX up to High HP5 1DY up to High HP5 1EA up to High HP5 1EB up to High HP5 1EF up to High HP5 1EG up to High HP5 1EP up to High HP5 1ER up to High HP5 1ES up to High HP5 1FE up to High HP5 1FX up to High HP5 1GW up to High HP5 1HG up to High HP5 1HR up to High HP5 1JD up to High HP5 1JH up to High HP5 1JL up to High HP5 1LH up to High HP5 1NG up to High HP5 1NL up to High HP5 1NQ up to High HP5 1NZ up to High HP5 1PG up to High HP5 1PQ up to High HP5 1PX up to High HP5 1QE up to High HP5 1QJ up to High HP5 1QQ up to High HP5 1SA up to High HP5 1SE up to High HP5 1SH up to High HP5 1SJ up to High HP5 1TA up to High HP5 1TH up to High HP5 1TL up to High HP5 1TN up to High HP5 1TU up to High HP5 1UE up to High HP5 2AA up to High HP5 2AF up to High HP5 2AH up to High HP5 2HA up to High HP5 2JB up to High HP5 2JS up to High HP5 3DX up to High HP5 3DZ up to High HP5 3ED up to High HP5 1HT up to Medium HP5 1LN up to Medium HP5 1PE up to Medium HP5 1SF up to Medium HP5 1SG up to Medium HP5 1SS up to Medium HP5 1TJ up to Medium HP5 1TP up to Medium HP5 1TW up to Medium HP5 1WA up to Medium HP5 2JD up to Medium HP5 1BT up to Low HP5 1EJ up to Low HP5 1ET up to Low HP5 1EZ up to Low HP5 1HF up to Low HP5 1HS up to Low HP5 1HU up to Low HP5 1LD up to Low HP5 1LF up to Low HP5 1LW up to Low HP5 1LZ up to Low HP5 1ND up to Low HP5 1SD up to Low HP5 1TR up to Low HP5 1TT up to Low HP5 2JU up to Low

Rivers and flooding history near HP5

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

15 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006, most recently 23 September 2024. 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 HP5? 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

HP4 HP3 HP7 HP8 HP1 HP10 HP11 HP12

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.