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Does HP20 flood?

Yes — parts of the HP20 district carry real flood risk: 7 of its 46 at-risk postcodes reach the Environment Agency's High likelihood band. The HP20 postcode district covers Bierton, Kingsbrook & Wing, close to Aylesbury, Rowsham, Stone, and surrounding villages in parts of Buckinghamshire and Central Bedfordshire.

46 postcodes in the HP20 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 7 high, 3 medium, 26 low, 10 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 HP20 postcodes are at risk?

HP20 1AL up to High HP20 1AQ up to High HP20 1AR up to High HP20 1AY up to High HP20 1DQ up to High HP20 1UG up to High HP20 2BJ up to High HP20 1DX up to Medium HP20 1JT up to Medium HP20 1PX up to Medium HP20 1AF up to Low HP20 1DA up to Low HP20 1DB up to Low HP20 1DH up to Low HP20 1DN up to Low HP20 1DS up to Low HP20 1DU up to Low HP20 1DW up to Low HP20 1EB up to Low HP20 1FE up to Low HP20 1FF up to Low HP20 1FW up to Low HP20 1FY up to Low HP20 1FZ up to Low HP20 1GF up to Low HP20 1PJ up to Low HP20 1PQ up to Low HP20 1PS up to Low HP20 1PU up to Low HP20 1PW up to Low HP20 1PY up to Low HP20 1QN up to Low HP20 1RB up to Low HP20 1RD up to Low HP20 1RU up to Low HP20 2SR up to Low HP20 1AS up to Very low HP20 1AW up to Very low HP20 1BD up to Very low HP20 1BH up to Very low HP20 1PA up to Very low HP20 1PB up to Very low HP20 1PD up to Very low HP20 1QH up to Very low HP20 1RY up to Very low HP20 2TE up to Very low

Rivers and flooding history near HP20

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

56 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (2 at warning level or above), most recently 15 February 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 HP20? 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

HP19 HP21 HP18 HP22 HP17 HP23 HP16 HP14

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.