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Does TR4 flood?

Yes — parts of the TR4 district carry real flood risk: 32 of its 48 at-risk postcodes reach the Environment Agency's High likelihood band. The TR4 postcode district covers Threemilestone & Chacewater, St Agnes, Lanner, Stithians & Gwennap, St Newlyn East, Cubert & Goonhavern, close to Mithian, Bissoe, Truro, and surrounding villages in Cornwall.

48 postcodes in the TR4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 32 high, 6 medium, 10 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 TR4 postcodes are at risk?

TR4 8AA up to High TR4 8AB up to High TR4 8AD up to High TR4 8AF up to High TR4 8BH up to High TR4 8DH up to High TR4 8DL up to High TR4 8GY up to High TR4 8HD up to High TR4 8HG up to High TR4 8JN up to High TR4 8NH up to High TR4 8NL up to High TR4 8PT up to High TR4 8QU up to High TR4 8QZ up to High TR4 8RA up to High TR4 8RB up to High TR4 8SH up to High TR4 8SJ up to High TR4 8SN up to High TR4 8ST up to High TR4 8UB up to High TR4 9EA up to High TR4 9HR up to High TR4 9LH up to High TR4 9LN up to High TR4 9NB up to High TR4 9PE up to High TR4 9PR up to High TR4 9QQ up to High TR4 9QR up to High TR4 8AR up to Medium TR4 8PD up to Medium TR4 8RG up to Medium TR4 8RW up to Medium TR4 8TZ up to Medium TR4 9ED up to Medium TR4 8FH up to Low TR4 8HX up to Low TR4 8PX up to Low TR4 8PY up to Low TR4 8RL up to Low TR4 8RN up to Low TR4 8SX up to Low TR4 9EH up to Low TR4 9EL up to Low TR4 9QU up to Low

Rivers and flooding history near TR4

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

48 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (30 at warning level or above), most recently 29 August 2026. Warnings cover flood areas, not individual addresses.

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

🏠 Buying or renting in TR4? 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

TR3 TR5 TR2 TR6 TR1 TR7 TR8 TR9

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.