Does RM3 flood?

Yes — parts of the RM3 district carry real flood risk: 2 of its 17 at-risk postcodes reach the Environment Agency's High likelihood band. The RM3 postcode district covers Harold Wood, Gooshays, close to Romford, Upminster, Elm Park, and surrounding villages in parts of England and Essex.

17 postcodes in the RM3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 2 high, 2 medium, 13 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 RM3 postcodes are at risk?

RM3 0FF up to High RM3 0RA up to High RM3 0JU up to Medium RM3 0QX up to Medium RM3 0BW up to Low RM3 0HU up to Low RM3 0HX up to Low RM3 0JA up to Low RM3 0JF up to Low RM3 0JH up to Low RM3 0LA up to Low RM3 0SH up to Low RM3 9DJ up to Low RM3 9JJ up to Low RM3 9JL up to Low RM3 9LS up to Low RM3 9YX up to Low

Rivers and flooding history near RM3

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

Harold Park on the River Ingrebourne — 0.7 km away, highest on record 3.13m
Romford on the River Rom — 5 km away, highest on record 1.15m
Collier Row on the River Rom — 5.9 km away, highest on record 1.86m
Hornchurch_Bretons Farm on the River Beam — 7.1 km away, highest on record 1.67m

163 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 27 August 2026. Warnings cover flood areas, not individual addresses.

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

EA06JuneSummer2016 (2016) — about 1.5 km from the centre
June 2016 flooding — about 0.8 km from the centre
July 2012 flooding — about 0.7 km from the centre
January 2011 flooding — about 0.6 km from the centre

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

🏠 Buying or renting in RM3? 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

RM2 RM4 RM1 RM5 RM6 RM7 RM9 RM10

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.