Does RG21 flood?

Yes — parts of the RG21 district carry real flood risk: 31 of its 61 at-risk postcodes reach the Environment Agency's High likelihood band. The RG21 postcode district covers Brookvale & Kings Furlong, Eastrop & Grove, close to Old Basing, Chineham, Sherfield On Loddon, and surrounding villages in Hampshire.

61 postcodes in the RG21 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 31 high, 1 medium, 29 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 RG21 postcodes are at risk?

RG21 1TB up to High RG21 4QA up to High RG21 4QF up to High RG21 7AA up to High RG21 7AW up to High RG21 7BB up to High RG21 7BE up to High RG21 7BF up to High RG21 7EN up to High RG21 7ES up to High RG21 7FB up to High RG21 7FH up to High RG21 7HY up to High RG21 7LD up to High RG21 7LG up to High RG21 7LW up to High RG21 7QR up to High RG21 7QT up to High RG21 7QU up to High RG21 7QW up to High RG21 7RA up to High RG21 7RE up to High RG21 7RL up to High RG21 7RP up to High RG21 7RR up to High RG21 7RU up to High RG21 7RZ up to High RG21 7SG up to High RG21 7TB up to High RG21 7TF up to High RG21 8FX up to High RG21 7TA up to Medium RG21 7AB up to Low RG21 7JY up to Low RG21 7LJ up to Low RG21 7LR up to Low RG21 7LS up to Low RG21 7QP up to Low RG21 7QQ up to Low RG21 7RB up to Low RG21 7RH up to Low RG21 7RN up to Low RG21 7RQ up to Low RG21 7RT up to Low RG21 7RW up to Low RG21 7RX up to Low RG21 7SD up to Low RG21 7SH up to Low RG21 7SN up to Low RG21 7TE up to Low RG21 8FY up to Low RG21 8SA up to Low RG21 8SB up to Low RG21 8SE up to Low RG21 8SF up to Low RG21 8SG up to Low RG21 8SJ up to Low RG21 8SP up to Low RG21 8SS up to Low RG21 8SW up to Low RG21 8XW up to Low

Rivers and flooding history near RG21

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

92 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006, most recently 25 March 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 RG21? 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

RG20 RG22 RG19 RG18 RG24 RG17 RG25 RG26

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.