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Does RG9 flood?

Yes — parts of the RG9 district carry real flood risk: 76 of its 128 at-risk postcodes reach the Environment Agency's High likelihood band. The RG9 postcode district covers Sonning Common, Thames, Chiltern Villages, close to Harpsden, Henley-On-Thames, Lower Shiplake, and surrounding villages in parts of Buckinghamshire and Reading.

128 postcodes in the RG9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 76 high, 16 medium, 36 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 RG9 postcodes are at risk?

RG9 1AZ up to High RG9 1BE up to High RG9 1BF up to High RG9 1BH up to High RG9 1JD up to High RG9 1TJ up to High RG9 2BT up to High RG9 2HR up to High RG9 2HS up to High RG9 2HU up to High RG9 2JA up to High RG9 2JB up to High RG9 2JD up to High RG9 2JE up to High RG9 2JL up to High RG9 2JN up to High RG9 2JZ up to High RG9 2LA up to High RG9 2LJ up to High RG9 2LL up to High RG9 2LN up to High RG9 2LP up to High RG9 2LQ up to High RG9 2LR up to High RG9 2LS up to High RG9 2LT up to High RG9 2LU up to High RG9 2LW up to High RG9 2LX up to High RG9 2LY up to High RG9 2NH up to High RG9 3AA up to High RG9 3AF up to High RG9 3AU up to High RG9 3AY up to High RG9 3AZ up to High RG9 3BB up to High RG9 3BH up to High RG9 3BL up to High RG9 3DA up to High RG9 3DB up to High RG9 3DH up to High RG9 3HB up to High RG9 3HE up to High RG9 3HT up to High RG9 3HX up to High RG9 3HY up to High RG9 3JD up to High RG9 3LP up to High RG9 3LS up to High RG9 3LW up to High RG9 3LY up to High RG9 3LZ up to High RG9 3NA up to High RG9 3NN up to High RG9 3NR up to High RG9 3NS up to High RG9 3NT up to High RG9 3NU up to High RG9 3NX up to High RG9 4AX up to High RG9 4BS up to High RG9 4HB up to High RG9 4HF up to High RG9 6AD up to High RG9 6AN up to High RG9 6AT up to High RG9 6AU up to High RG9 6LT up to High RG9 6RL up to High RG9 6RP up to High RG9 6RT up to High RG9 6RU up to High RG9 6RX up to High RG9 6RY up to High RG9 6SX up to High RG9 1AH up to Medium RG9 1AN up to Medium RG9 1AT up to Medium RG9 1BB up to Medium RG9 1BQ up to Medium RG9 1HG up to Medium RG9 2BP up to Medium RG9 2BY up to Medium RG9 2LB up to Medium RG9 3AX up to Medium RG9 3BG up to Medium RG9 3LT up to Medium RG9 3NG up to Medium RG9 6AG up to Medium RG9 6AH up to Medium RG9 6AP up to Medium RG9 1AY up to Low RG9 1BD up to Low RG9 1BG up to Low RG9 1BS up to Low RG9 1BT up to Low RG9 1BU up to Low RG9 1BY up to Low RG9 1DB up to Low RG9 1DD up to Low RG9 1DS up to Low RG9 1FH up to Low RG9 1HH up to Low RG9 2AR up to Low RG9 2HX up to Low RG9 2JJ up to Low RG9 3BD up to Low RG9 3BE up to Low RG9 3BX up to Low RG9 3BY up to Low RG9 3BZ up to Low RG9 3DL up to Low RG9 3DN up to Low RG9 3LD up to Low RG9 3LF up to Low RG9 3LJ up to Low RG9 3LL up to Low RG9 3LX up to Low RG9 3NB up to Low RG9 3NE up to Low RG9 3NY up to Low RG9 3PA up to Low RG9 3PB up to Low RG9 4GE up to Low RG9 4HA up to Low RG9 4HD up to Low RG9 6TD up to Low

Rivers and flooding history near RG9

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

341 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (62 at warning level or above), most recently 28 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 RG9? 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

RG10 RG8 RG7 RG12 RG6 RG5 RG14 RG4

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.