FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Up to Medium likelihood
Properties in TR18 3DN sit in the Environment Agency's Medium flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 1 | 1 |
| Low | 0.1% – 1% | 8 | 7 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a medium-likelihood area has a 22–57% chance of flooding at least once.
The ground here sits at about 8 m above sea level and falls 51 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north, 10.0 m higher.
Because properties in the medium likelihood band; 6 recorded floods nearby; 617 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around TR18 3DN. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Recorded flood | Approx. distance |
|---|---|---|
| Apr 2016 | CW9490 - Penzance | ~1.2 km |
| Feb 2014 | CW9389 - Penzance | ~0.7 km |
| Feb 2014 | CW9383 - Penzance - Eastern Green | ~0.4 km |
| Feb 2014 | CW9346 - Penzance | ~0.4 km |
| Nov 2012 | CW9198 - Penzance - Chyandour | ~0.4 km |
| Oct 2006 | CW8618 - Chyandour Square, Penzance | ~0.4 km |
EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 49 warnings nearby) · Imogen (2016, 10 warnings nearby) · Eleanor (2018, 8 warnings nearby) · Emma (2018, 8 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Penzance Alverton | Lariggan River | 2.3 km | 0.30 m | 0.68 m |
| Newlyn Coombe | Newlyn Coombe River | 3.0 km | 1.05 m | 0.66 m |
| ST ERTH | — | 7.3 km | — | — |
| ST ERTH | — | 7.3 km | — | — |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Outside 5 Trevarrack Lane Cso | Local Stream (s) | 0.1 km | 53 (2024) | 25 |
| Finns Cso | Local Stream (s) | 0.3 km | 66 (2024) | 127 |
| Albert Pier Pumping Station | Mounts Bay | 1.1 km | 0 (2024) | 0 |
| Bolitho Road Cso | Surface Water Drain To Chyandr | 1.7 km | 96 (2024) | 285 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
82 mapped flood-defence assets within 500 m — nearest ~37 m (wall, embankment, engineered high ground, bridge abutment). Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near TR18 3DN — all in the TR18 district.
© 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. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the TR18 district.