Subsidence claims in August hit their highest monthly level on record at Hastings Direct, the Guardian reported. Volumes were almost 140% higher than in the same month last year. The surge follows five heatwaves layered on the warmest spring ever recorded in England and Wales. It has not finished.
That last point changes the client conversation. Subsidence damage typically becomes visible through late summer and autumn. Hastings has predicted volumes will remain elevated through October unless sustained rainfall restores soil moisture. The Association of British Insurers (ABI) Q2 2026 data, cited by the Guardian, shows the average settled claim has reached a record £20,000. Insurers paid out £72 million on domestic subsidence claims in the second quarter alone.
The peril has been accelerating for years. Total UK subsidence payouts reached £307 million in 2025, up 10% on the previous year and a record high, according to the ABI. The pattern since 2018 has been one of recurring surge years.
Claims Consortium Group noted earlier this summer that ground conditions at the start of 2026 had not recovered from 2025. The current dry spell began before soil moisture levels were restored. Autumn rain arrives on already depleted ground.
Aviva now dominates UK home insurance following its £3.7 billion acquisition of Direct Line in July. The insurer told the Guardian it had seen subsidence claims rise in recent months and that the trend was likely to continue without rainfall. Amanda Blanc, Aviva's chief executive, said the company was reviewing its reserves for subsidence and would also revisit its pricing models.
When the UK's two largest home insurers are publicly reviewing reserves and pricing models mid-year, it signals repricing. Clients with property on clay-rich ground carry a specific risk. The British Geological Survey identifies the most exposed areas as London, Essex, Kent, and the corridor running from Oxford to the Wash. The average subsidence claim has risen more than £2,000 in a single year. A sum insured set two or three years ago may not cover reinstatement costs today.
Hastings predicted volumes would remain higher than normal through to around October. That window is commercially important. Clay soils that shrink during drought absorb returning moisture unevenly.
The result is structural movement in both directions: subsidence on the way down, heave on the way back up. That cycle compounds the underinsurance risk. The Buildings Cost Information Service warned in August that rebuilding costs had risen 3.9% in the year to July. Clients whose sums insured have not been reviewed recently may find the gap has already widened.
The wider market is already feeling the pressure. Deloitte projected in late 2025 that UK home insurers would record a combined ratio of 102.1% in 2026. That kind of squeeze typically tightens underwriting terms at renewal for exposed risks. Brokers with clients in high-risk postcode areas have a narrow window before the autumn claims season makes that conversation harder.
