Does KT11 flood?

Yes — parts of the KT11 district carry real flood risk: 23 of its 34 at-risk postcodes reach the Environment Agency's High likelihood band. The KT11 postcode district covers Oxshott and Stoke D'Abernon, Cobham and Downside, Fetcham, close to Stoke D'abernon, Leatherhead, Byfleet, and surrounding villages in parts of Surrey and Greater London.

34 postcodes in the KT11 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 23 high, 6 medium, 5 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 KT11 postcodes are at risk?

Rivers and flooding history near KT11

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

Downside Bridge on the River Mole — 1.4 km away, highest on record 3.46m
Leatherhead on the River Mole — 5.1 km away, highest on record 3.74m
Brooklands on the River Wey — 5.6 km away, highest on record 4.04m
Esher on the River Mole — 6.4 km away, highest on record 3.24m

467 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (111 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):

Cobham_Dec2013 (2013) — about 1.2 km from the centre
Cobham2_Dec2013 (2013) — about 1.5 km from the centre
Cobham3_Dec2013 (2013) — about 0.9 km from the centre
LeatherheadSTW_Dec2013 (2013) — about 2.9 km from the centre

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

🏠 Buying or renting in KT11? 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

KT10 KT12 KT13 KT9 KT14 KT8 KT15 KT7

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.