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Does RH12 flood?

Yes — parts of the RH12 district carry real flood risk: 10 of its 31 at-risk postcodes reach the Environment Agency's High likelihood band. The RH12 postcode district covers Denne, Holbrook West, Trafalgar, Itchingfield, Slinfold & Warnham, close to Tanbridge, Horsham, Drungewick, and surrounding villages in parts of West Sussex and Surrey.

31 postcodes in the RH12 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 10 high, 1 medium, 20 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 RH12 postcodes are at risk?

RH12 1NJ up to High RH12 2QU up to High RH12 2RA up to High RH12 3BP up to High RH12 3JG up to High RH12 3JJ up to High RH12 3LN up to High RH12 3NA up to High RH12 3PT up to High RH12 4RG up to High RH12 1TG up to Medium RH12 1DU up to Low RH12 1EP up to Low RH12 1FY up to Low RH12 1JR up to Low RH12 1PG up to Low RH12 1QT up to Low RH12 1RH up to Low RH12 1SS up to Low RH12 1TX up to Low RH12 2AU up to Low RH12 2HJ up to Low RH12 2LT up to Low RH12 2QT up to Low RH12 3LR up to Low RH12 3PG up to Low RH12 3QQ up to Low RH12 5HH up to Low RH12 5HP up to Low RH12 5PU up to Low RH12 5QA up to Low

Rivers and flooding history near RH12

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

64 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (11 at warning level or above), most recently 14 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 RH12? 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

RH11 RH13 RH10 RH14 RH15 RH9 RH16 RH8

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.