PL20 6AB - Flood, Heat, Air & Subsidence Risk - Horrabridge (PL20)

West Devon, Horrabridge (PL20)

Climate risk summary for PL20 6AB

Heat risk is Lower, with a median (50th percentile) of 12 days above 25°C per year, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario (Met Office UKCP18). Air quality is Low at PM2.5 4.9 μg/m³, within the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Argillite-Slate geology; shrink-swell risk is classed as improbable (BGS GeoClimate).

• Flood: No flood-risk band is published for this postcode in the current dataset releases - a data-coverage gap rather than a rating. The national agencies' address-level flood services cover every property.
• Heat: Projected 12 days above 25°C per year, 2021-2040 average (Met Office UKCP18, 50th percentile under RCP8.5, 12 km grid - postcodes within the same grid cell share this value).
• Air quality: PM2.5 4.9 µg/m³ - within the WHO annual guideline of 5 µg/m³ (Defra UK-AIR PCM model, council-level average - every postcode in this council shows this value).
• Ground: BGS data: Argillite-Slate geology. Shrink-swell risk classed as improbable (British Geological Survey).
• Green space: 99% of households here have accessible green space within a 15-minute walk (the government's Environmental Improvement Plan standard), and 37% have a park or green space within a 200m walk of their door - above the England median (Defra, 2025).

What is the flood risk in PL20 6AB?

An official flood-risk band is not available for PL20 6AB in the current dataset releases used by LocalRisk. This is a data-coverage gap rather than a low-risk rating. For a property-level reading, the Environment Agency's Check Your Long-Term Flood Risk service covers every address in England.

How is the air quality in PL20 6AB?

Air quality at PL20 6AB is rated Low, based on Defra UK-AIR annual mean PM2.5 data. Fine particulate matter (PM2.5) comes primarily from road traffic, industry, and domestic burning. Long-term exposure above the WHO guideline of 5 µg/m³ is linked to respiratory and cardiovascular health risks. Buyers and renters in higher air quality risk areas may wish to consider whether the property is near busy roads or industrial sources.

Is subsidence a risk at PL20 6AB?

British Geological Survey data classes the underlying soil at PL20 6AB as Argillite-Slate, with shrink-swell hazard rated improbable (subsidence risk band: Low). A structural survey is the reliable way to assess ground conditions for a specific property.

Where does this data come from?

This LocalRisk report for PL20 6AB draws on four official UK open data sources: Environment Agency NaFRA2 flood modelling, Met Office UKCP18 climate projections, Defra UK-AIR PM2.5 monitoring, and British Geological Survey GeoClimate subsidence mapping. Risk ratings are a screening tool, complementing - not replacing - the searches and surveys ordered as part of a property transaction. Data covers West Devon and is updated as new official datasets are published.

About the West Devon area

West Devon has a largely rural and upland setting on the western flank of Dartmoor, with moorland, river valleys and the market towns of Okehampton and Tavistock, and experiences cool, wet winters and mild summers, shaped by elevation and Atlantic weather systems.

Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for PL20 6AA is at localrisk.co.uk/postcode/PL206AA, and you can compare PL20 6AB side by side with any UK postcode at localrisk.co.uk/compare.