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Does M21 flood?

Yes — parts of the M21 district carry real flood risk: 16 of its 163 at-risk postcodes reach the Environment Agency's High likelihood band. The M21 postcode district covers Chorlton, Chorlton Park, Whalley Range, close to Fallowfield, Northenden, Northern Moor, and surrounding villages in parts of Greater Manchester and Cheshire East.

163 postcodes in the M21 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 16 high, 32 medium, 108 low, 7 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 M21 postcodes are at risk?

M21 0SA up to High M21 2AN up to High M21 7BD up to High M21 7SX up to High M21 7TL up to High M21 7UD up to High M21 7UN up to High M21 8AU up to High M21 8AY up to High M21 8EF up to High M21 8EH up to High M21 8ER up to High M21 8FE up to High M21 8FF up to High M21 8PZ up to High M21 8UB up to High M21 0AZ up to Medium M21 0BN up to Medium M21 0GU up to Medium M21 0GY up to Medium M21 0QU up to Medium M21 0QY up to Medium M21 0QZ up to Medium M21 0RB up to Medium M21 0RD up to Medium M21 0RE up to Medium M21 0RF up to Medium M21 0RG up to Medium M21 0RH up to Medium M21 0RJ up to Medium M21 0RR up to Medium M21 0RY up to Medium M21 0SD up to Medium M21 0TG up to Medium M21 0TN up to Medium M21 0TQ up to Medium M21 0TR up to Medium M21 0TS up to Medium M21 0TU up to Medium M21 0TW up to Medium M21 0TX up to Medium M21 2RF up to Medium M21 7RJ up to Medium M21 7ST up to Medium M21 7SZ up to Medium M21 7TE up to Medium M21 8BZ up to Medium M21 8UA up to Medium M21 0AW up to Low M21 0BP up to Low M21 0BW up to Low M21 0DZ up to Low M21 0GT up to Low M21 0GW up to Low M21 0GX up to Low M21 0GZ up to Low M21 0RA up to Low M21 0RL up to Low M21 0RU up to Low M21 0SN up to Low M21 0TD up to Low M21 0TE up to Low M21 0TF up to Low M21 0TH up to Low M21 0TJ up to Low M21 0TL up to Low M21 0TP up to Low M21 0TT up to Low M21 0TZ up to Low M21 0UG up to Low M21 0UH up to Low M21 0UP up to Low M21 0UQ up to Low M21 0UR up to Low M21 0UT up to Low M21 0UU up to Low M21 0UX up to Low M21 0UZ up to Low M21 0XA up to Low M21 0XD up to Low M21 0XJ up to Low M21 0XU up to Low M21 0XX up to Low M21 0XY up to Low M21 0XZ up to Low M21 0YA up to Low M21 0YB up to Low M21 0YG up to Low M21 0YR up to Low M21 0YT up to Low M21 0ZA up to Low M21 1AZ up to Low M21 1BN up to Low M21 7GF up to Low M21 7PT up to Low M21 7PU up to Low M21 7PX up to Low M21 7RF up to Low M21 7RG up to Low M21 7SG up to Low M21 7SJ up to Low M21 7SP up to Low M21 7SQ up to Low M21 7SR up to Low M21 7SS up to Low M21 7TB up to Low M21 7UB up to Low M21 7UL up to Low M21 8DN up to Low M21 8DP up to Low M21 8TZ up to Low M21 8UE up to Low M21 9BG up to Low M21 9ES up to Low M21 9FF up to Low M21 9FR up to Low M21 9FS up to Low M21 9FX up to Low M21 9GA up to Low M21 9GE up to Low M21 9GF up to Low M21 9GG up to Low M21 9GH up to Low M21 9GJ up to Low M21 9GZ up to Low M21 9HE up to Low M21 9JN up to Low M21 9JU up to Low M21 9NF up to Low M21 9NQ up to Low M21 9NR up to Low M21 9NS up to Low M21 9NT up to Low M21 9NU up to Low M21 9NX up to Low M21 9NY up to Low M21 9NZ up to Low M21 9PG up to Low M21 9PJ up to Low M21 9PQ up to Low M21 9PT up to Low M21 9PW up to Low M21 9QD up to Low M21 9QE up to Low M21 9QF up to Low M21 9QH up to Low M21 9QJ up to Low M21 9SS up to Low M21 9WG up to Low M21 9WJ up to Low M21 9WQ up to Low M21 9WR up to Low M21 9WS up to Low M21 9WT up to Low M21 9WU up to Low M21 9WX up to Low M21 0AG up to Very low M21 0RN up to Very low M21 0RP up to Very low M21 8UX up to Very low M21 9AX up to Very low M21 9GW up to Very low M21 9QL up to Very low

Rivers and flooding history near M21

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

300 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (104 at warning level or above), most recently 4 September 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 M21? 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

M20 M22 M19 M23 M18 M24 M17 M25

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.