Does BB1 flood?

Yes — parts of the BB1 district carry real flood risk: 14 of its 102 at-risk postcodes reach the Environment Agency's High likelihood band. The BB1 postcode district covers Little Harwood & Whitebirk, Bastwell & Daisyfield, Roe Lee, close to Blackburn, Lower Darwen, Accrington, and surrounding villages in parts of Lancashire and Blackburn with Darwen.

102 postcodes in the BB1 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 14 high, 5 medium, 80 low, 3 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 BB1 postcodes are at risk?

BB1 2FH up to High BB1 3BW up to High BB1 3ES up to High BB1 3EU up to High BB1 4AL up to High BB1 4AN up to High BB1 4ND up to High BB1 6NH up to High BB1 8QA up to High BB1 8QU up to High BB1 9ET up to High BB1 9PP up to High BB1 9PX up to High BB1 9SR up to High BB1 3HT up to Medium BB1 9AT up to Medium BB1 9EX up to Medium BB1 9EY up to Medium BB1 9SL up to Medium BB1 1AF up to Low BB1 1EP up to Low BB1 1FB up to Low BB1 2EA up to Low BB1 2EB up to Low BB1 2LU up to Low BB1 3AB up to Low BB1 3EA up to Low BB1 3EE up to Low BB1 3HP up to Low BB1 3HR up to Low BB1 3HU up to Low BB1 3HY up to Low BB1 4NR up to Low BB1 5AA up to Low BB1 5AF up to Low BB1 5AL up to Low BB1 5AS up to Low BB1 5AW up to Low BB1 5AX up to Low BB1 5AZ up to Low BB1 5BD up to Low BB1 5EY up to Low BB1 5JJ up to Low BB1 5JL up to Low BB1 5JN up to Low BB1 5LZ up to Low BB1 5NJ up to Low BB1 5NP up to Low BB1 5NQ up to Low BB1 5NR up to Low BB1 5PD up to Low BB1 5PE up to Low BB1 5PH up to Low BB1 5PJ up to Low BB1 5PL up to Low BB1 5PQ up to Low BB1 6AD up to Low BB1 6AF up to Low BB1 6AG up to Low BB1 6AP up to Low BB1 6AR up to Low BB1 6AS up to Low BB1 6AY up to Low BB1 6DG up to Low BB1 6DT up to Low BB1 6DZ up to Low BB1 6EW up to Low BB1 6HL up to Low BB1 6JE up to Low BB1 6JQ up to Low BB1 6LE up to Low BB1 6LF up to Low BB1 6LH up to Low BB1 6LP up to Low BB1 6LQ up to Low BB1 6LT up to Low BB1 6LU up to Low BB1 6LX up to Low BB1 6NB up to Low BB1 7AR up to Low BB1 7DJ up to Low BB1 7DT up to Low BB1 7EB up to Low BB1 7JG up to Low BB1 7NQ up to Low BB1 7SB up to Low BB1 8QW up to Low BB1 8RP up to Low BB1 9AU up to Low BB1 9DR up to Low BB1 9PY up to Low BB1 9SH up to Low BB1 9SN up to Low BB1 9SP up to Low BB1 9SU up to Low BB1 9SW up to Low BB1 9TJ up to Low BB1 9TL up to Low BB1 9TN up to Low BB1 5NL up to Very low BB1 5PU up to Very low BB1 9AN up to Very low

Rivers and flooding history near BB1

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

203 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (53 at warning level or above), most recently 8 December 2025. Warnings cover flood areas, not individual addresses.

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

🏠 Buying or renting in BB1? 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

BB2 BB3 BB4 BB5 BB6 BB7 BB8 BB9

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.