Tendring, Great Clacton
CO15 1ND in Great Clacton has a High flood risk - EA NaFRA2 data records 21 properties at high flood risk. Heat risk is Medium, with a median (50th percentile) of 26 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 6.8 μg/m³, above the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are High risk, with River Terrace Sand/Gravel geology; shrink-swell risk is classed as probable (BGS GeoSure).
National comparison
Flood risk at CO15 1ND is rated High, based on Environment Agency NaFRA2 modelling.
Heat risk at CO15 1ND is rated Medium, reflecting Met Office UKCP18 climate projections (50th percentile) for this area, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario. These are probabilistic projections - the 50th percentile is the central estimate within RCP8.5; the full range of modelled outcomes is wide and lower emissions scenarios would produce lower figures. Higher summer temperatures increase cooling energy costs, affect comfort in poorly insulated or south-facing properties, and can accelerate shrinkage in clay soils beneath foundations. Properties built before 1980 without cavity wall insulation are typically most affected.
Air quality at CO15 1ND 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 CO15 1ND as River Terrace Sand/Gravel, with shrink-swell hazard rated probable (subsidence risk band: High). 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.
The nearest projected coastal erosion zone to CO15 1ND is 64 m away (Erosion projected by 2055 (no climate change uplift) - SMP policy: Hold The Line mapping) and the postcode is in the very high coastal erosion risk band. Coastal erosion risk varies along the shoreline depending on local geology, sea defences and Shoreline Management Plan policy. For properties near the coast, a specialist coastal erosion risk assessment is recommended.
This LocalRisk report for CO15 1ND 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 Tendring and is updated as new official datasets are published.
Tendring has a low-lying coastal and rural setting with estuaries, flat farmland and seaside towns and experiences cool, wet winters and warm summers, influenced by North Sea exposure and limited elevation.
Environment Agency flood zone data places CO15 1ND in the high flood risk band. EA NaFRA2 data shows 21 at high 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.
Practical check: EA flags 21 properties at flood risk here, near the coast - compare the floor level to the highest recorded tide line and check for flood resilience measures. With 26 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. With river terrace sand/gravel geology here, look for signs of ground movement - diagonal cracks above windows, sticking doors, and gaps between walls and extensions. The nearest projected erosion zone is 64m away - check the Shoreline Management Plan policy for this stretch and whether the property is within 100 years of the erosion line. These are postcode-level indicators - conditions vary between individual properties.