Millions of homes in London, Essex and Kent at risk of sinking as climate crisis worsens

Signs of subsidence include diagonal cracks around window and door frames. It can substantially reduce a property’s value and lends will often refuse to offer mortgages until it has been resolved. Photograph: Avalon/Construction Photography/Alamy View image in fullscreen Signs of subsidence include diagonal cracks around window and door frames. It can substantially reduce a property’s value and lends will often refuse to offer mortgages until it has been resolved. Photograph: Avalon/Construction Photography/Alamy Millions of homes in London, Essex and Kent at risk of sinking as climate crisis worsens Analysis pinpoints areas most vulnerable to hotter, drier weather causing ground to shrink and drag foundations down Millions of homes are at risk from climate-related subsidence, according toan analysis (BGS). As hotter, drier summers driven , the ground under houses can shrink and drag down a property’s foundations. The most vulnerable areas include London, Essex, Kent and a tranche of land from Oxford up to the Wash on England’s east coast, according to scientists, who say mitigation measures will be needed. Anna Harrison, a scientist at the BGS, said: “, we have been able to identify the areas of Great Britain most likely to become susceptible to shrink-swell subsidence. Most are in the London area and that’s also where you’re going to see bigger changes in rainfall and temperature. It’s a double whammy.” UK ‘built for climate that no longer exists’ and needs urgent changes to survive global heating, report warns London also has a higher density of buildings. Harrison added: “These properties might have foundations that currently can withstand the changes in moisture, but you might find in future there’s going to be more movement. It’s probably going to get worse.” Subsidence can substantially reduce a property’s value and lenders will often refuse to offer mortgages until it has been resolved. Signs include diagonal cracks around window and door frames, as well as sloping floors. It can require engineering work to stabilise land or underpin a property. In some cases, utility pipes need to be replaced and trees and vegetation removed. In 2025, the UK experienced the warmest spring on record and the driest in more than 50 years. There were £153m of subsidence-related insurance claims in the first six months of the same year. With climate crisis projections indicating that hotter, drier conditions are likely to become increasingly frequent over the coming century, the number of properties susceptible to subsidence-related shrink-swell is on the rise.