Does M4 flood?

Yes — parts of the M4 district carry real flood risk: 4 of its 34 at-risk postcodes reach the Environment Agency's High likelihood band. The M4 postcode district covers Cheetham, Piccadilly, Ancoats & Beswick, close to Manchester, Ancouts, Salford, and surrounding villages in Greater Manchester.

34 postcodes in the M4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 4 high, 4 medium, 26 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 M4 postcodes are at risk?

M4 4DW up to High M4 4HF up to High M4 4JS up to High M4 4JW up to High M4 7DA up to Medium M4 7DG up to Medium M4 7DJ up to Medium M4 7DL up to Medium M4 4AJ up to Low M4 4AQ up to Low M4 4DG up to Low M4 4DL up to Low M4 4DN up to Low M4 4DP up to Low M4 4DQ up to Low M4 4DR up to Low M4 4EE up to Low M4 4EF up to Low M4 4EH up to Low M4 4EJ up to Low M4 4EN up to Low M4 4EW up to Low M4 4FE up to Low M4 4FH up to Low M4 4FJ up to Low M4 4GR up to Low M4 4HB up to Low M4 4HY up to Low M4 4JJ up to Low M4 4JL up to Low M4 4JT up to Low M4 4NL up to Low M4 5GD up to Low M4 7DD up to Low

Rivers and flooding history near M4

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

London Road on the River Medlock — 1.6 km away, highest on record 1.80m
Manchester Racecourse on the River Irwell — 2.8 km away, highest on record 5.67m
Littleton Road River on the River Irwell — 4.4 km away, highest on record 4.98m
Northenden on the River Mersey — 8.9 km away, highest on record 3.76m

310 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (116 at warning level or above), most recently 21 February 2026. Warnings cover flood areas, not individual addresses.

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

Manchester Manchester - NYE/NYD 25 (2025) — about 1.6 km from the centre
Manchester Harpurhey - NYE/NYD 25 (2025) — about 1.6 km from the centre
Manchester Castlefields - NYE/NYD 25 (2025) — about 2 km from the centre
Collyhurst Road, (2019) — about 0.6 km from the centre

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

🏠 Buying or renting in M4? 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

M3 M5 M6 M1 M7 M8 M9 M11

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.