North Somerset, Sidcot (BS25)
BS25 5NW in Sidcot (BS25) has a High flood risk - EA NaFRA2 data records 5 properties at high flood risk. Heat risk is Lower, with a median (50th percentile) of 22 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 5.5 μg/m³, above the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Colluvium geology; shrink-swell risk is classed as improbable (BGS GeoSure).
Flood risk at BS25 5NW is rated High, based on Environment Agency NaFRA2 modelling.
Environment Agency flood zone data places BS25 5NW in the high flood risk band. EA NaFRA2 data shows 5 at high risk, 2 at medium risk, 11 at low risk in this postcode. The band reflects the highest flood risk within the postcode; some properties within this postcode may face little or no direct flood risk. A formal flood risk search and review of buildings insurance availability is recommended before any property transaction in this area.
Air quality at BS25 5NW 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.
BGS GeoSure data classes the underlying soil at BS25 5NW as Colluvium, 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 BS25 5NW 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 North Somerset and is updated as new official datasets are published.
North Somerset has a coastal and low-lying setting with estuarine land, coastal towns and rising ground inland and experiences cool, wet winters and mild summers, shaped by Bristol Channel influence and varied terrain.
Practical check: With 5 properties at high flood risk here, ask about past flooding events, check the entrance threshold height relative to road level, and review buildings insurance terms. With 22 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 BS25 1AA is at localrisk.co.uk/postcode/BS251AA, and you can compare BS25 5NW side by side with any UK postcode at localrisk.co.uk/compare.