Suspected subsidence brings two worries at once — is my house actually damaged, and what is this going to do to my insurance — and the second question tends to generate more anxiety than it needs to. The claims process exists specifically to work out what’s moving, why, and what proportionate repair actually looks like. It isn’t a foregone conclusion that leads automatically to enormous cost or unmanageable disruption, though it’s also not a quick or entirely stress-free process either.
Does buildings insurance actually cover subsidence?
Subsidence is commonly included as a standard peril under UK buildings insurance policies, but “commonly included” isn’t the same as “always included on the same terms,” and cover ultimately depends on your specific policy wording, any exclusions it contains, and its excess structure. Properties with a previous subsidence history, unusual construction or other higher-risk features can carry different terms, sometimes with subsidence excluded, more restricted, or available only with a higher excess.
The only way to know your own position with certainty is to read your policy document or ask your insurer directly — this genuinely isn’t a subject where a general assumption is a safe substitute for checking. The Association of British Insurers’ guidance on home insurance provides a useful general overview, but your own policy wording takes precedence.
When should you actually contact your insurer?
Not every hairline plaster crack justifies opening a subsidence claim, and treating every minor mark as a potential insurance event isn’t a sensible default. What generally does justify notification is a pattern that genuinely fits the profile discussed in our companion article on recognising significant cracks: new or clearly widening cracks, cracking that’s appeared alongside doors or windows sticking or floors feeling uneven, or a professional opinion that’s specifically flagged a concern.
Once you do believe there’s a genuine issue, timing matters. Your policy may contain its own notification requirements, and the Association of British Insurers’ guidance on suspected subsidence is straightforward: contact your insurer as soon as possible if you suspect subsidence damage. Waiting unnecessarily can also make it harder later to establish exactly when the damage first appeared or began progressing.
A simple record made before or around the time you contact the insurer can be surprisingly useful. Photograph the affected areas, keep the original image dates where possible, and note when you first noticed each change and whether it appears to be progressing. Insurers and, if a dispute later arises, the Financial Ombudsman Service may rely on photographs, reports and a clear timeline when assessing what happened.
What tends to happen after you notify your insurer
The exact process varies by insurer and by the apparent severity of the issue, so treat the following as a general shape rather than a fixed sequence every claim will follow. It typically begins with an initial assessment, often including questions about when symptoms first appeared and what you’ve noticed.
Where the insurer considers further investigation is warranted, they’ll usually arrange a specialist inspection — commonly a chartered surveyor or engineer working on the insurer’s behalf. In many cases, particularly where the picture isn’t immediately clear, monitoring follows: crack gauges or level surveys tracking movement over a period of months, precisely because — as covered in our article on subsidence versus settlement — distinguishing historic, stabilised movement from something actively ongoing generally can’t be done from a single visit.
Depending on what the investigation and monitoring show, drainage or tree investigation may follow where either looks like a plausible contributing cause, and an engineer will typically be involved in determining both the cause and, if needed, an appropriate remedial approach.
The Financial Ombudsman Service’s guidance on subsidence and other ground movement explains that a thorough investigation can include crack monitoring, trial holes, boreholes and CCTV inspection of nearby drains, depending on the circumstances. Monitoring over a full year can sometimes be reasonable where seasonal movement needs to be understood.
This is genuinely not always a quick process. Solving a suspected subsidence case properly — investigating fully and completing any necessary repair — can take a good deal longer than most other types of home insurance claim, sometimes stretching over many months and in some cases well beyond a year, particularly where a period of monitoring is required to confirm the ground has stabilised before remedial work begins.
RICS consumer guidance on subsidence notes that investigating and rectifying a subsidence problem can in some cases take up to two years.
Monitoring first, work later — and that’s usually deliberate
It can feel frustrating to be told your insurer wants to watch and wait rather than fix something straight away, but there’s a sound reason behind it: undertaking expensive structural work before properly understanding whether movement is ongoing, and why, risks treating the wrong problem, or treating a problem that’s already stopped on its own.
Monitoring establishes the actual pattern of movement before committing to a repair strategy, which is a more reliable — if slower — way of getting the right outcome.
What repair can actually involve — and why underpinning isn’t the default
The word “subsidence” tends to conjure images of underpinning, but that’s a significant overstatement of how most confirmed cases are actually resolved. Depending on what the investigation identifies as the cause, outcomes can include repairing a leaking drain or pipe, addressing or managing a contributing tree, more limited structural repair or stabilisation work, or, in a genuinely smaller proportion of cases, underpinning — a more substantial engineering intervention that reinforces or extends a building’s foundations.
It’s worth being direct about this, because it’s one of the most persistent misconceptions in the whole subject: a subsidence claim does not automatically mean underpinning.
RICS guidance on subsidence estimates that fewer than 5% of properties suffering from subsidence require underpinning, and its consumer guidance cites the Institution of Structural Engineers’ position that underpinning should be used only as a last resort — not as the default first response to a confirmed case.
What it might cost, and who pays
Underpinning, in the smaller number of cases where it is genuinely needed, is a significant undertaking. RICS gives a broad guide of around £10,000 to £75,000 for a typical house, potentially more for a larger property depending on the extent of the work. Those are broad guidance figures rather than a quotation for any individual property.
Where a subsidence claim is accepted, covered investigation and repair costs will normally be dealt with under the terms of the buildings policy, less any applicable excess. Exactly which investigations and remedial works are covered still depends on the policy and the circumstances of the claim.
Subsidence excesses are also worth understanding on their own terms, because they commonly work differently from an ordinary buildings claim. The ABI says most policies have an excess of around £1,000 for a subsidence claim, although the actual figure varies by insurer and policy and can be higher in some circumstances.
Checking your specific policy documents, rather than assuming a standard figure applies, is the only reliable way to know your own position.
What happens to your premiums afterwards
It’s worth being honest, and appropriately cautious, here: a subsidence claim can affect your insurance going forward, but the specific effects vary enormously by insurer, by the nature and outcome of the claim, and by whether the underlying cause has been properly fixed.
It isn’t accurate to say premiums will definitely rise sharply, or that cover becomes permanently unobtainable, or that every insurer will refuse a previously affected property — none of those absolute claims holds up against how varied the actual market response is.
What’s realistic to say is that renewal terms, premium, excess level and insurer choice can all be affected to some degree, and that some homeowners with a subsidence history do find themselves needing specialist insurers rather than the mainstream market, particularly soon after a claim or where the underlying cause wasn’t fully resolved.
The ABI’s guidance on protecting a home from subsidence says its member companies are committed to working with policyholders to manage ongoing subsidence risk and maintain cover where possible, while recognising that there will be circumstances where continued cover isn’t possible.
Switching insurer with a subsidence history
Changing insurer after a subsidence claim, or while one is ongoing, is possible but needs care, and the timing of any new symptoms relative to the switch genuinely matters.
The ABI’s Domestic Subsidence Claims Agreement, which participating insurers adopt voluntarily, sets out a specific system for claims that emerge after a change of insurer.
| When the claim is notified after the new policy starts | Who handles it under the ABI agreement? |
|---|---|
| Eight weeks or less | The previous insurer handles the claim. |
| More than eight weeks but less than one year | The insurer first notified handles it, with the settlement cost shared between the two insurers. |
| One year or more | The current insurer handles the claim. |
The agreement only applies where the relevant circumstances and participating insurers fall within its terms. Importantly, it deals with a change of insurer rather than a change of property ownership; it does not apply in the same way where the home has changed hands and the policyholder has changed.
Where previous and current insurers disagree about responsibility outside, or in the application of, those arrangements, the issue can ultimately become a complaint to the Financial Ombudsman Service. The Ombudsman describes ground-movement disputes as technically complex and says expert evidence and technical data may be needed to establish what actually caused the damage and which policy should respond.
Relevance when you come to sell
Previous subsidence, whatever the outcome, tends to become a relevant fact when a property is later sold — buyers, their surveyors and their own insurers will typically want to understand what happened, what was done about it, and whether there’s monitoring evidence or documentation confirming that the problem was stabilised and repaired.
Presenting a clear, well-documented history rather than an incomplete or defensive one generally serves a seller better. Keep claim correspondence, surveyor or engineer reports, monitoring results, repair records and any certificate or other completion documentation that was issued.
The detail of managing this as part of a sale is covered properly in Property Front Page’s Buying & Selling section, rather than here.
If a claim is rejected
Not every suspected case turns out to be an insured subsidence event. An insurer may conclude that what’s actually happened is ordinary settlement, thermal movement, general wear and tear, defective construction or another cause that falls outside the specific cover the policy provides — any of which can look similar to subsidence at first glance without necessarily meeting the policy’s definition of an insured event.
Where you genuinely disagree with an insurer’s conclusion, there’s a formal complaints process to follow with the insurer first. If you’re unhappy with its final response, or it hasn’t sent you a final response within eight weeks of your formal complaint, you can then ask the Financial Ombudsman Service to consider the dispute.
The reassurance worth holding onto
Suspected subsidence is simultaneously a structural question and a financial one, but the process that follows a genuine notification exists precisely to work through both properly — establishing what’s actually moving, why, and what a proportionate response looks like, rather than assuming the worst outcome from the outset.
It can be slow, and it can be genuinely stressful while it’s ongoing, but underpinning, catastrophic cost and permanently unobtainable insurance are all far less inevitable outcomes than the word “subsidence” tends to suggest.
This article provides general property information, not advice on your specific insurance policy or property. Cover, excesses and claims processes vary between insurers and policies — always check your own policy documents or speak to your insurer directly. This is not financial advice, and Property Front Page is not a broker or insurer.
