Dutch Homes Face Increasing Threat from Sinking Foundations

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Dutch Homes Face Increasing Threat from Sinking Foundations

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Many homes in the Netherlands, particularly those built before 1970, rely on wooden pile foundations or shallow foundations. These foundations are increasingly vulnerable due to several factors, primarily fluctuating groundwater levels caused by climate change, including prolonged droughts and heavy rainfall. When groundwater levels drop, wooden piles can be exposed to oxygen, leading to bacterial and fungal decay, known as “pile rot.” Shallow foundations, often resting on soft soil layers like peat and clay, also suffer as these soils shrink when they dry out, causing the ground and the houses on it to subside unevenly.

A government watchdog reported in July 2026 that over 400,000 buildings in the Netherlands are facing foundation problems or are likely to in the next 10 years. Approximately 120,000 of these buildings are in urgent need of repair. The estimated cost to address this widespread damage could reach €54 billion if no action is taken. Mandy Korff, a foundations expert at TU Delft, has stated that climate change is worsening these problems.

The consequences for homeowners include visible cracks in walls, sticking doors and windows, and uneven or sloping floors. Reports of foundation problems to the Knowledge Center for Addressing Foundation Problems (KCAF) doubled in 2026, with many coming from areas with significant clay and peat in the subsoil. Homeowners are typically responsible for these expensive repairs, which can range from €500 to €120,000, and often, insurance does not cover the damage as it’s not considered a sudden, unforeseen event. The issue has also been shown to affect property values, with studies indicating an average price discount for houses exposed to land subsidence.

The Dutch Association of Insurers advocates for permanently raising groundwater levels where possible to limit further damage and calls for thorough research into preventive measures. The government has also been urged to consider these issues in new housing developments to ensure construction on stable land.

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