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Does SG9 flood?

Yes — parts of the SG9 district carry real flood risk: 18 of its 43 at-risk postcodes reach the Environment Agency's High likelihood band. The SG9 postcode district covers Buntingford, Little Hadham & The Pelhams, The Mundens, Weston & Sandon, close to Braughing, Furneux Pelham, Walkern, and surrounding villages in parts of Hertfordshire and Essex.

43 postcodes in the SG9 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 18 high, 3 medium, 22 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 SG9 postcodes are at risk?

SG9 0AN up to High SG9 0DX up to High SG9 0EE up to High SG9 0LJ up to High SG9 0LZ up to High SG9 0NT up to High SG9 0QH up to High SG9 0RX up to High SG9 0TS up to High SG9 9ES up to High SG9 9FZ up to High SG9 9JS up to High SG9 9LH up to High SG9 9LJ up to High SG9 9NG up to High SG9 9PB up to High SG9 9PG up to High SG9 9RS up to High SG9 0LL up to Medium SG9 0PH up to Medium SG9 0PJ up to Medium SG9 0AE up to Low SG9 0AL up to Low SG9 0AP up to Low SG9 0LD up to Low SG9 0LH up to Low SG9 0LT up to Low SG9 0PG up to Low SG9 0RG up to Low SG9 9AG up to Low SG9 9AL up to Low SG9 9AP up to Low SG9 9AQ up to Low SG9 9AR up to Low SG9 9AS up to Low SG9 9BF up to Low SG9 9HQ up to Low SG9 9HT up to Low SG9 9JT up to Low SG9 9ND up to Low SG9 9NR up to Low SG9 9QQ up to Low SG9 9RB up to Low

Rivers and flooding history near SG9

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

20 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006, most recently 8 January 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 SG9? 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

SG10 SG8 SG11 SG7 SG12 SG6 SG13 SG5

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.