Does GL9 flood?

Yes — parts of the GL9 district carry real flood risk: 1 of its 2 at-risk postcodes reach the Environment Agency's High likelihood band. The GL9 postcode district covers Boyd Valley, close to West Kington, Chipping Sodbury, Wick, and surrounding villages in parts of Wiltshire and South Gloucestershire.

2 postcodes in the GL9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 1 high, 1 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 GL9 postcodes are at risk?

GL9 1HE up to High GL9 1JE up to Low

Rivers and flooding history near GL9

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

West Kington on the By Brook — 3 km away, highest on record 0.80m
Chipping Sodbury on the Bristol Frome — 6.3 km away, highest on record 2.38m
Wick on the River Boyd — 11 km away, highest on record 2.26m
Middlehill on the By Brook — 11.1 km away, highest on record 2.41m

7 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (7 at warning level or above), most recently 14 November 2025. Warnings cover flood areas, not individual addresses.

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

West Kington_Nov 2012 (2012) — about 3 km from the centre
EA112_Avon_April_Flood Event (2012) — about 16.4 km from the centre
Tidal Severn (1981) — about 25.7 km from the centre
This represents flooding in the area in 1974 (1974) — about 2.9 km from the centre

🏠 Buying or renting in GL9? 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

GL10 GL8 GL11 GL7 GL12 GL6 GL13 GL5

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.