Does RH3 flood?

Yes — parts of the RH3 district carry real flood risk: 11 of its 16 at-risk postcodes reach the Environment Agency's High likelihood band. The RH3 postcode district covers Brockham, Betchworth, Buckland, Box Hill & Headley, close to Dorking, Sidlow, Redhill, and surrounding villages in parts of Surrey and West Sussex.

16 postcodes in the RH3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 11 high, 2 medium, 3 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 RH3 postcodes are at risk?

RH3 7AD up to High RH3 7AE up to High RH3 7DP up to High RH3 7JL up to High RH3 7JN up to High RH3 7JT up to High RH3 7JU up to High RH3 7JX up to High RH3 7JY up to High RH3 7LD up to High RH3 7LS up to High RH3 7JP up to Medium RH3 7LR up to Medium RH3 7HL up to Low RH3 7JW up to Low RH3 7NB up to Low

Rivers and flooding history near RH3

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

Kinnersley Manor on the River Mole — 6.9 km away, highest on record 3.50m
Redhill on the Redhill Brook — 8 km away, highest on record 2.46m
Leatherhead on the River Mole — 8.1 km away, highest on record 3.74m
Chipstead on the Groundwater Level — 8.1 km away, highest on record 106.78m

224 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (54 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):

Betchworth_Dec2013 (2013) — about 1.2 km from the centre
BoxHill_Dec2013 (2013) — about 3.7 km from the centre
Brockham_Dec2013 (2013) — about 0.6 km from the centre
Pixham1_Dec2013 (2013) — about 1.8 km from the centre

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

🏠 Buying or renting in RH3? 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

RH2 RH4 RH1 RH5 RH6 RH7 RH8 RH9

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.