Homeowners in the UK are facing an increase in subsidence claims, primarily attributed to two successive summers of record-breaking heat. Henry Biggs, a resident of Stroud, Gloucestershire, reported significant damage to his newly purchased home, with visible cracks allowing him to see into adjacent rooms. Such instances have been more frequent, affecting numerous property owners across the country.
Record Temperature Impacts
Last month, August, was among the hottest months ever recorded globally, compounding the trend of extreme weather conditions. The impact on UK homes has been notable, as hotter, drier conditions followed by warmer, wetter winters result in soil shrinkage and expansion, leading to damage to property foundations. Homes with shallow foundations or those built on clay-rich soils, particularly in areas like London and the east of England, are at heightened risk.
Insurance Industry Response
The insurance sector has seen a marked rise in subsidence claims. Hastings Insurance observed a 140% spike in August compared to the previous year, with a 30% overall increase in claims for 2026. In response, firms like Axa and Aviva are revising their strategies and financial reserves to accommodate this increase. Admiral Insurance is currently managing Biggs’s claim, with measurements taken recently—over a year since the claim filing. The resolution timeline remains uncertain for many affected homeowners.
Financial and Structural Concerns
According to the Association of British Insurers (ABI), the average subsidence claim reached £20,000 between April and June, reflecting a rise of over £2,000 compared to the previous year. Insurance payouts for domestic subsidence reached £72 million in this period, a significant increase from £60 million last year. These figures highlight the financial burden on both insurers and homeowners, with claims processing delays exacerbating the stress on property owners.
Geological Insights and Future Risks
Geospatial scientist Timothy Farewell, from MapleSky, notes that widespread soil drying has led to increased occurrences of subsidence, affecting infrastructure like roads and water mains. Subsidence risk is heightened where differential soil movement occurs, often influenced by nearby vegetation, which exacerbates ground movement asymmetry.
Homeowner Dilemmas
Many homeowners, mindful of potential premium increases, are hesitant to make subsidence claims. Some, like Rachel Hogarth Smith, are advised to undertake preventive measures such as removing trees that worsen subsidence conditions. Others, like Melissa from Walthamstow, face long waits for structural assessments and repairs. Insurers warn that even unfounded claims might complicate future insurance procurement.
Future Considerations
While newer homes are considered less at risk, the National House Building Council is evaluating whether current building standards need adjustment. Legal expert Sarah Dodd highlights that effective underpinning is a reliable solution, with very few instances of recurring subsidence post-repair. Nonetheless, the insurance and construction industries continue to assess strategies to mitigate the growing subsidence threat amid changing climatic patterns.
Reporting based on coverage first published by theguardian.com.