Does SL7 flood?

Yes — parts of the SL7 district carry real flood risk: 39 of its 174 at-risk postcodes reach the Environment Agency's High likelihood band. The SL7 postcode district covers Marlow, Chiltern Villages, Bisham & Cookham, close to Hurley, Bourne End, Cookham, and surrounding villages in parts of Buckinghamshire and Windsor and Maidenhead.

174 postcodes in the SL7 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 39 high, 57 medium, 78 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 SL7 postcodes are at risk?

SL7 1NQ up to High SL7 1QB up to High SL7 1QD up to High SL7 1QE up to High SL7 1QU up to High SL7 1QX up to High SL7 1QY up to High SL7 1RE up to High SL7 1RF up to High SL7 1RG up to High SL7 1RH up to High SL7 1RJ up to High SL7 1RL up to High SL7 1RN up to High SL7 1RQ up to High SL7 1RR up to High SL7 1RS up to High SL7 1RY up to High SL7 1RZ up to High SL7 1SA up to High SL7 1SG up to High SL7 1SJ up to High SL7 1SQ up to High SL7 1UA up to High SL7 2AB up to High SL7 2AE up to High SL7 2AG up to High SL7 2BL up to High SL7 2DX up to High SL7 2DY up to High SL7 2EB up to High SL7 2EY up to High SL7 2EZ up to High SL7 2FG up to High SL7 2HB up to High SL7 2SN up to High SL7 2SR up to High SL7 2TA up to High SL7 3RX up to High SL7 1BU up to Medium SL7 1LL up to Medium SL7 1LN up to Medium SL7 1LQ up to Medium SL7 1LS up to Medium SL7 1LW up to Medium SL7 1NA up to Medium SL7 1NH up to Medium SL7 1PE up to Medium SL7 1PF up to Medium SL7 1PG up to Medium SL7 1PX up to Medium SL7 1QA up to Medium SL7 1QF up to Medium SL7 1QG up to Medium SL7 1QH up to Medium SL7 1QJ up to Medium SL7 1QL up to Medium SL7 1QN up to Medium SL7 1QQ up to Medium SL7 1QT up to Medium SL7 1QW up to Medium SL7 1QZ up to Medium SL7 1RP up to Medium SL7 1RU up to Medium SL7 1RW up to Medium SL7 1SD up to Medium SL7 1SZ up to Medium SL7 1TB up to Medium SL7 2AD up to Medium SL7 2AH up to Medium SL7 2AJ up to Medium SL7 2AL up to Medium SL7 2AN up to Medium SL7 2AP up to Medium SL7 2AQ up to Medium SL7 2AR up to Medium SL7 2AU up to Medium SL7 2AW up to Medium SL7 2AX up to Medium SL7 2AY up to Medium SL7 2AZ up to Medium SL7 2BB up to Medium SL7 2BD up to Medium SL7 2BE up to Medium SL7 2BG up to Medium SL7 2BH up to Medium SL7 2BQ up to Medium SL7 2DU up to Medium SL7 2ER up to Medium SL7 2FD up to Medium SL7 2FL up to Medium SL7 2HE up to Medium SL7 3RQ up to Medium SL7 3RT up to Medium SL7 3RY up to Medium SL7 3SB up to Medium SL7 1AL up to Low SL7 1AN up to Low SL7 1AQ up to Low SL7 1DU up to Low SL7 1DW up to Low SL7 1EY up to Low SL7 1FJ up to Low SL7 1FX up to Low SL7 1GP up to Low SL7 1HZ up to Low SL7 1JN up to Low SL7 1LD up to Low SL7 1LG up to Low SL7 1LH up to Low SL7 1LJ up to Low SL7 1LP up to Low SL7 1LU up to Low SL7 1ND up to Low SL7 1NE up to Low SL7 1NF up to Low SL7 1NG up to Low SL7 1NJ up to Low SL7 1NL up to Low SL7 1NN up to Low SL7 1NR up to Low SL7 1NS up to Low SL7 1NT up to Low SL7 1NU up to Low SL7 1NW up to Low SL7 1NX up to Low SL7 1PA up to Low SL7 1PB up to Low SL7 1PH up to Low SL7 1PJ up to Low SL7 1PL up to Low SL7 1PQ up to Low SL7 1PR up to Low SL7 1PY up to Low SL7 1PZ up to Low SL7 1QP up to Low SL7 1QR up to Low SL7 1QS up to Low SL7 1RB up to Low SL7 1RD up to Low SL7 1RX up to Low SL7 1SB up to Low SL7 1SS up to Low SL7 1SY up to Low SL7 1TF up to Low SL7 1TG up to Low SL7 1TH up to Low SL7 1TQ up to Low SL7 1UB up to Low SL7 1UD up to Low SL7 1UH up to Low SL7 1UJ up to Low SL7 1UL up to Low SL7 1UN up to Low SL7 1UP up to Low SL7 1UR up to Low SL7 1US up to Low SL7 1UW up to Low SL7 1XT up to Low SL7 1YA up to Low SL7 1YG up to Low SL7 1YL up to Low SL7 2AA up to Low SL7 2AS up to Low SL7 2BA up to Low SL7 2BJ up to Low SL7 2FW up to Low SL7 2HA up to Low SL7 2HG up to Low SL7 2HQ up to Low SL7 2SL up to Low SL7 2SZ up to Low SL7 3FJ up to Low SL7 3RH up to Low

Rivers and flooding history near SL7

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

137 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (37 at warning level or above), most recently 27 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 SL7? 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

SL6 SL8 SL5 SL9 SL4 SL3 SL2 SL1

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.