Does MK11 flood?

Yes — parts of the MK11 district carry real flood risk: 7 of its 13 at-risk postcodes reach the Environment Agency's High likelihood band. The MK11 postcode district covers Stony Stratford, close to Haversham, Thornborough, Willen, and surrounding villages in parts of City of Milton Keynes and Buckinghamshire.

13 postcodes in the MK11 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 7 high, 3 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).

Free preview first · full report £19

Which MK11 postcodes are at risk?

MK11 1AR up to High MK11 1AS up to High MK11 1AT up to High MK11 1AW up to High MK11 1BQ up to High MK11 1FH up to High MK11 1LS up to High MK11 1AP up to Medium MK11 1BL up to Medium MK11 1FG up to Medium MK11 1AH up to Low MK11 1LJ up to Low MK11 1PW up to Low

Rivers and flooding history near MK11

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

Stony Stratford on the River Great Ouse — 0.5 km away, highest on record 1.16m
Haversham on the River Great Ouse — 3.9 km away, highest on record 2.98m
Thornborough on the River Great Ouse — 7.3 km away, highest on record 1.24m
WILLEN GS — 9.6 km away

136 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (38 at warning level or above), most recently 12 March 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

July 2007 (2007) — about 0.2 km from the centre
Easter 1998 (1998) — about 0.3 km from the centre

🏠 Buying or renting in MK11? 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

MK10 MK12 MK13 MK14 MK15 MK7 MK16 MK6

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.