Does CB1 flood?

Yes — parts of the CB1 district carry real flood risk: 7 of its 13 at-risk postcodes reach the Environment Agency's High likelihood band. The CB1 postcode district covers Romsey, Fen Ditton & Fulbourn, Market, Coleridge, close to Cambridge, Milton, Grantchester, and surrounding villages in Cambridgeshire.

13 postcodes in the CB1 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 7 high, 6 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 CB1 postcodes are at risk?

CB1 1HA up to High CB1 3HP up to High CB1 3NY up to High CB1 3NZ up to High CB1 3PA up to High CB1 9AJ up to High CB1 9AL up to High CB1 3EW up to Low CB1 3HR up to Low CB1 3HY up to Low CB1 3NS up to Low CB1 3NW up to Low CB1 3NX up to Low

Rivers and flooding history near CB1

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

Cambridge Baits Bite on the River Cam — 4.4 km away, highest on record 0.75m
Bin Brook on the Bin Brook — 4.9 km away, highest on record 2.12m
Cambridge Byron's Pool on the River Rhee — 5.1 km away, highest on record 1.63m
Stapleford on the River Granta — 6.3 km away, highest on record 1.49m

140 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (16 at warning level or above), most recently 16 February 2026. Warnings cover flood areas, not individual addresses.

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

October 2001 (2001) — about 2.4 km from the centre
May 1978 (1978) — about 3.2 km from the centre
March 1947 (1947) — about 2.3 km from the centre
March 1947 (1947) — about 6.8 km from the centre

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

🏠 Buying or renting in CB1? 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

CB2 CB3 CB4 CB5 CB6 CB7 CB8 CB9

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.