Does MK18 flood?

Yes — parts of the MK18 district carry real flood risk: 30 of its 61 at-risk postcodes reach the Environment Agency's High likelihood band. The MK18 postcode district covers Buckingham, Horwood, Grendon Underwood & The Claydons, Quainton, close to Thornborough, Stony Stratford, Brackley, and surrounding villages in parts of Buckinghamshire and Oxfordshire.

61 postcodes in the MK18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 30 high, 12 medium, 18 low, 1 very 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 MK18 postcodes are at risk?

MK18 1AG up to High MK18 1AH up to High MK18 1AJ up to High MK18 1AL up to High MK18 1DA up to High MK18 1DB up to High MK18 1DD up to High MK18 1DQ up to High MK18 1EN up to High MK18 1EP up to High MK18 1ER up to High MK18 1GB up to High MK18 1GX up to High MK18 1JD up to High MK18 1RP up to High MK18 1UP up to High MK18 2BL up to High MK18 2BU up to High MK18 2DN up to High MK18 2ED up to High MK18 3NQ up to High MK18 4AB up to High MK18 4DY up to High MK18 4DZ up to High MK18 5AS up to High MK18 5AU up to High MK18 5LX up to High MK18 5NU up to High MK18 7BF up to High MK18 7DL up to High MK18 1AF up to Medium MK18 1EG up to Medium MK18 1GT up to Medium MK18 1GW up to Medium MK18 1NY up to Medium MK18 1TD up to Medium MK18 2DF up to Medium MK18 4DL up to Medium MK18 5BQ up to Medium MK18 5EZ up to Medium MK18 5LY up to Medium MK18 7HX up to Medium MK18 1BU up to Low MK18 1BY up to Low MK18 1DG up to Low MK18 1EE up to Low MK18 1GA up to Low MK18 1GR up to Low MK18 1GS up to Low MK18 1HA up to Low MK18 1HH up to Low MK18 1PY up to Low MK18 1SF up to Low MK18 1SN up to Low MK18 1ZU up to Low MK18 2DH up to Low MK18 2EB up to Low MK18 2HP up to Low MK18 4AE up to Low MK18 5BE up to Low MK18 7BP up to Very low

Rivers and flooding history near MK18

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

35 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (15 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):

🏠 Buying or renting in MK18? 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

MK17 MK19 MK16 MK15 MK14 MK13 MK12 MK11

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.