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Does EX20 4LT flood?

Up to Low likelihood

Properties in EX20 4LT sit in the Environment Agency's Low 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 bandAnnual chancePropertiesOf which homes
Highgreater than 3.3%00
Medium1% – 3.3%00
Low0.1% – 1%10
Very lowbelow 0.1%00

Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.

The ground around EX20 4LT

The ground here sits at about 275 m above sea level and falls 115 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the east-south-east, 37.6 m higher.

Shaded relief map of the ground around EX204LT, computed from Environment Agency LiDAR. The ground here sits at about 275 m above sea level and falls 115 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the east-south-east, 37.6 m higher.
Shaded relief of the bare ground within about 400 m of EX20 4LT, computed from the Environment Agency's published LiDAR terrain survey. The ring marks the postcode centre, not a property. This shows the shape of the land, not a flood map — it does not include drains, culverts, walls or kerbs, and the official likelihood band above is the authoritative figure. © Environment Agency copyright and/or database right 2022. All rights reserved.
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Get the full flood report for EX20 4LT — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for EX20 4LT

FloodRadarProperty Flood-Risk Report
EX20 4LT
Lower flood risk — standard checks apply

Because properties in the low likelihood band; 1 official warnings since 2006.

C Today — indicative grade (A best → E)
··· By the 2050s — EA climate scenario (in the full report)
⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: No ⚑ Flood defences within 500 m: No ⚑ In flood zone 2 or 3: ···
Rivers & sea
Up to Low
Surface water
···
Groundwater
Not assessed
Historic flooding
None within ~1 km
Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells
High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

The map above shows the real EA rivers & sea likelihood cells around EX20 4LT. 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.

Official flood warnings near EX20 4LT

1
flood alerts & warnings within 10 km since 2017
1
of them full flood warnings or severe warnings
2017
most recent warning nearby (2017-07-30)

Warnings cover flood areas, not individual addresses.

The rivers that matter for EX20 4LT

GaugeRiverDistanceTypical highHighest on record
Meldon West Okement River 0.9 km 1.50 m 1.64 m
Vellake West Okement River 2.4 km 1.20 m 1.71 m
Okehampton Mill Road East Okement River 3.5 km 0.90 m 1.48 m
Sticklepath River Taw 8.4 km 1.80 m 2.30 m

Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.

Storm overflows within 5 km

OverflowDischarges intoDistanceSpillsHours
Castle Hospital Cso West Okement (s) 2.9 km 1 (2024) 6
Taxi Rank 1 Combined Sewer Overflow East Okement River 3.5 km 6 (2024) 1
Old Gateway 2 Combined Sewer Of East Okement River 3.5 km 24 (2024) 11
Old Gateway 1 Combined Sewer Of East Okement River 3.5 km 39 (2024) 32

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.

What the full property report adds

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.

Flood risk at nearby postcodes

EX20 4AA up to Low EX20 4AJ up to High EX20 4AL up to Medium EX20 4DE up to Medium EX20 4ED up to Medium EX20 4EE up to High EX20 4EG up to High EX20 4EL up to High EX20 4EN up to High EX20 4EW up to Medium EX20 4HN up to Low EX20 4HQ up to High

At-risk postcodes near EX20 4LT — all in the EX20 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 EX20 district.