Subsidence — the downward movement of the ground beneath a building — affects an estimated 1 in 50 properties in the UK, with claims averaging £6,000-£10,000 and severe cases costing £50,000 or more. While standard home insurance policies typically include subsidence cover, the exclusions and conditions are where problems emerge. Previous subsidence claims, proximity to trees, clay soil, and certain construction types can all trigger higher excesses, exclusions, or refusal of cover entirely. Buying a property with a history of subsidence — or discovering subsidence after purchase — creates a cascade of insurance complications that can affect your ability to sell, remortgage, or make future claims. Understanding exactly what your policy covers before you buy is essential.
What is a Home Insurance Subsidence?
Subsidence cover in a home buildings insurance policy provides financial protection against damage caused by the downward movement of the site on which the property stands. This is distinct from settlement (natural compaction of soil under a new building), heave (upward ground movement), and landslip (lateral ground movement), though many policies cover all four under the same section. Cover typically extends to the cost of stabilising the property (often through underpinning), repairing structural damage, and associated professional fees.
Red flags to watch for
The industry standard subsidence excess is £1,000, significantly higher than the typical £100-500 excess for other claims. An excess above £1,000 — sometimes £2,500-£5,000 for higher-risk properties — means you bear a substantial portion of the cost.
Tree root action (particularly from clay-soil areas where roots draw moisture from the ground) is the most common cause of subsidence in the UK. Excluding it effectively voids the most likely claim scenario.
If the property has a previous subsidence claim, insurers may exclude subsidence entirely or apply punitive terms. This is particularly problematic if you're buying a property without full disclosure of claims history.
The distinction between subsidence (covered) and settlement (usually excluded) is often unclear. Without a clear definition, the insurer may classify genuine subsidence as settlement to avoid the claim.
Some policies condition subsidence cover on maintaining the current tree/vegetation profile. If you remove a tree without approval, the resulting ground heave may not be covered.
Your legal rights
Home insurance in the UK is regulated by the Financial Conduct Authority (FCA) under the Insurance Act 2015 and the Consumer Insurance (Disclosure and Representations) Act 2012. Under the 2012 Act, consumers have a duty to take reasonable care not to make misrepresentations, but insurers cannot void a policy for innocent non-disclosure. The Insurance Act 2015 introduced the duty of fair presentation for commercial policies and strengthened remedies for breach. The FCA's Insurance Conduct of Business Sourcebook (ICOBS) requires insurers to handle claims fairly and promptly. The Financial Ombudsman Service (FOS) handles complaints and can make binding awards up to £415,000. The Association of British Insurers (ABI) Minimum Standards for the settlement of subsidence claims provide industry guidance on claims handling, monitoring periods, and repair standards. The Building Research Establishment (BRE) publishes technical guidance on subsidence diagnosis and repair that is referenced in claims disputes.
Questions to ask before you sign
- 1Does the policy cover subsidence, heave, and landslip, and what is the excess for each?
- 2Are there any specific exclusions related to tree roots, clay soil, or previous subsidence history?
- 3Has the property ever had a subsidence claim, and if so, what impact does this have on my cover?
- 4What monitoring period applies before the insurer will fund permanent repairs?
- 5Am I required to notify the insurer before removing, planting, or pruning trees near the property?
- 6What constitutes 'settlement' versus 'subsidence' under the policy, and how is the distinction determined?
Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.