South Gloucestershire, Filton (BS34)
Heat risk is Lower, with a median (50th percentile) of 25 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 Medium at PM2.5 6.6 μg/m³, above the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Siltstone And Limestone geology; shrink-swell risk is classed as improbable (BGS GeoSure).
Air quality at BS34 4AL is rated Medium, 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.
BGS GeoSure data classes the underlying soil at BS34 4AL as Siltstone And Limestone, with shrink-swell hazard rated improbable (subsidence risk band: Low). Soil type and shrink-swell behaviour drive subsidence claims following dry summers; recent ABI data shows insurer payouts rose sharply after the 2022 and 2025 hot summers. A structural survey is the reliable way to assess ground risk for a specific property.
This LocalRisk report for BS34 4AL 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 GeoSure subsidence mapping. Risk ratings are a screening tool, complementing - not replacing - the searches and surveys ordered as part of a property transaction. Data covers South Gloucestershire and is updated as new official datasets are published.
South Gloucestershire has a mixed suburban and rural setting with river valleys, former industrial land and fast-growing settlements such as Bradley Stoke and Yate, and experiences cool, wet winters and warm summers, shaped by lowland terrain and Severn Estuary influence.
Practical check: With 25 hot days projected (UKCP18 50th percentile, 2021-2040 average under RCP8.5), note which bedrooms face west (hottest in evening) and whether windows allow through-ventilation. These are postcode-level indicators - conditions vary between individual properties.
Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for BS34 4AA is at localrisk.co.uk/postcode/BS344AA, and you can compare BS34 4AL side by side with any UK postcode at localrisk.co.uk/compare.