Check coastal erosion risk by postcode across England, Wales and Scotland. The National Coastal Erosion Risk Mapping (NCERM) programme, run by the Environment Agency for England and Natural Resources Wales, identifies over 24,000 UK postcodes within 200 metres of projected shoreline retreat zones. NatureScot publishes equivalent coastal-change data for Scotland. LocalRisk maps the underlying agency data to a single Higher / Medium / Lower / Very Low band per postcode, alongside flood, heat, air quality and subsidence risk. Coastal erosion is the slow-onset twin of coastal flooding - they affect different stretches of coast and require different defensive responses, but both can materially affect property value, insurance and long-term plans.
Coastal erosion is the gradual wearing away of land by wave action, tides and storms. It is distinct from coastal flooding, which is short-term inundation during storm surges or high tides. Erosion is measured in metres-per-decade of shoreline retreat. The Environment Agency's NCERM programme projects retreat by 2025, 2055 and 2105 under three management scenarios.
The most exposed UK coastlines are the soft-rock cliffs of Holderness in East Yorkshire, the East Anglian and Suffolk coasts, parts of the Sussex coast, and eroding cliffs and dunes on Welsh and west-of-Scotland coasts. Hard-rock coastlines (Cornwall, north Devon, much of Pembrokeshire, the Scottish Highlands) retreat far more slowly because granite, limestone and metamorphic rocks resist wave action.
Retreat rates vary widely with geology. The Holderness coast in East Yorkshire is the fastest-eroding coastline in north-west Europe, losing roughly 1-2 metres per year on average and up to 10 metres in a single storm. Parts of the Norfolk and Suffolk coasts lose tens of centimetres per year. Hard-rock cliffs in Cornwall and west Scotland may retreat only millimetres per year.
Yes. Properties close to actively eroding coastlines can lose significant value as the risk becomes better understood. The Law Society's 2025 practice note on coastal erosion identifies it as a key disclosure risk for conveyancers handling coastal property transactions. Mortgage lenders increasingly request Shoreline Management Plan classification as part of valuations, particularly in East Yorkshire, Suffolk and Norfolk.
Standard buildings insurance does not cover gradual coastal erosion - it is excluded as a slow-onset peril rather than a sudden event. Storm damage and coastal flooding are typically covered (flooding via the Flood Re scheme for eligible homes built before 2009), but the long-term loss of land to retreating cliffs is not. Government-backed sea defences protect many at-risk areas but their long-term future is not guaranteed.
Shoreline Management Plans (SMPs) are documents published by Coastal Groups - partnerships of local authorities, the Environment Agency and other stakeholders - that set policy for each stretch of the English and Welsh coast over short (to 2025), medium (to 2055) and long-term (to 2105) horizons. Each stretch is assigned one of four policies: hold the line, advance the line, managed realignment, or no active intervention.
Managed realignment is a Shoreline Management Plan policy where the existing defence line is deliberately moved landward, allowing the coast to retreat in a controlled way. It is used where holding the line is no longer cost-effective or environmentally sustainable. Managed realignment areas typically see significantly higher long-term erosion in NCERM projections than 'hold the line' areas. Property owners may face compulsory purchase or relocation grants.
The Department for Infrastructure in Northern Ireland publishes coastal information but does not currently provide a property-level erosion-risk dataset compatible with the postcode-level methodology used for England (NCERM), Wales (NCERM/NRW) and Scotland (NatureScot). LocalRisk will add Northern Ireland coverage when a compatible dataset becomes available. For NI properties, the DfI Rivers coastal mapping service is the authoritative reference.