Does NR18 flood?

Yes — parts of the NR18 district carry real flood risk: 15 of its 29 at-risk postcodes reach the Environment Agency's High likelihood band. The NR18 postcode district covers South Wymondham, Wicklewood, Central Wymondham, Hingham & Deopham, close to Shropham, Clint Green, and surrounding villages in Norfolk.

29 postcodes in the NR18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 15 high, 3 medium, 11 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which NR18 postcodes are at risk?

Rivers and flooding history near NR18

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

Wymondham on the River Tiffey — 1.2 km away, highest on record 3.10m
Southburgh on the Blackwater River — 10.6 km away, highest on record 1.58m
COLNEY FGS — 11.4 km away
Colney on the River Yare — 11.5 km away, highest on record 1.58m

67 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (17 at warning level or above), most recently 8 December 2024. Warnings cover flood areas, not individual addresses.

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

2013 Flood Outline (2013) — about 31.2 km from the centre
1993 Fluival Flood Outline (1993) — about 15.4 km from the centre
1968 September Flood Outline (1968) — about 60.1 km from the centre
1953 Coast Flood Outline Norfolk (1953) — about 37.4 km from the centre

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

🏠 Buying or renting in NR18? 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

NR17 NR19 NR16 NR20 NR15 NR21 NR14 NR22

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.