Does Building Insurance Cover Cracked Walls? Subsidence and Claims

Buildings insurance generally does cover cracked walls, but only when the cracks come from a sudden event the policy lists as a covered peril. Subsidence, storm damage, fire, explosion, a vehicle hitting the property, or a burst pipe shifting the ground will usually trigger a payout. Cracks from normal settling, gradual wear and tear, poor maintenance, or slow deterioration are almost always excluded. What caused the crack matters far more than how bad it looks.

Cracks Insurers Will Pay For

Standard UK buildings insurance covers damage caused by fire, explosion, lightning, earthquake, storm, flood, impact from vehicles or falling trees, escape of water from burst pipes, and subsidence, heave, or landslip.1Aviva. Home Insurance Policy Wording US homeowners policies work similarly for foundation and wall damage, covering tornadoes, windstorms, hail, lightning, fire, burst pipes, vandalism, falling trees, and vehicle impact.2Progressive. Does Home Insurance Cover Foundation

The damage has to be sudden, and it has to be directly tied to one of these events. A tree brought down in a storm that cracks a wall is covered. A burst pipe that washes out soil under a corner of the house, cracking the wall above, usually is too. Walls that drifted toward cracking over years are not.

Storms in the UK also have to clear an intensity bar. Aviva, for example, defines a storm as sustained high winds gusting over 55 mph, rainfall of at least 25 mm per hour, or snowfall of at least 30 cm in 24 hours.1Aviva. Home Insurance Policy Wording If a wall gives way during heavy rain but was already in poor condition, the insurer can argue the weather simply exposed an existing problem rather than caused new damage.3Financial Ombudsman Service. Storm Damage

Cracks Insurers Won’t Pay For

Most wall cracks develop slowly, and insurers treat those as the homeowner’s responsibility. The standard exclusions are:

Subsidence, the Most Common Covered Cause

For UK homeowners, subsidence is the peril that matters most for cracked walls. It is the downward movement of the ground beneath a building’s foundations, driven by external factors like clay soil shrinking in dry weather, tree roots drawing moisture from the soil, or leaking drains washing material away.9Allianz. What Is Subsidence UK buildings policies typically cover subsidence, heave (upward ground movement, often after a large tree is removed), and landslip as standard.10Association of British Insurers. Subsidence

The claim figures show how significant this has become. In the first half of 2025, UK subsidence claims totaled £153 million across nearly 9,000 households, with the average payout reaching £17,264. The Association of British Insurers attributed the surge to an “exceptionally warm and sunny spring.”11Association of British Insurers. Insurance Support Tops £150 Million for Homes Affected by Subsidence

Subsidence or Just Settlement?

This distinction decides whether a claim is paid. Settlement happens when a new building compresses the soil underneath it, usually in the first decade after construction. It tends to produce fine, vertical cracks that stabilize over time.12Heliconusa. Soil Subsidence vs Settlement Subsidence cracks look different: typically diagonal, wider at one end than the other, often more than 3 mm across, and visible both inside and outside the property around doors and windows.13Admiral. Subsidence Explained Subsidence also progresses, and will keep getting worse until the underlying cause is dealt with.

Cosmetic Cracks vs Structural Cracks

Not every crack is worth a claim. Hairline cracks narrower than about 1 mm are usually cosmetic, caused by minor shrinkage, temperature swings, or humidity changes. They need a coat of filler and paint, nothing more.14Lemonade. What Insurance Do I Need for Cracked Walls

Structural cracks tend to be wider than about 3 mm (roughly the thickness of a 10p coin), run diagonally or horizontally, worsen over time, and come with other symptoms: sticking doors, sloping floors, gaps between walls and window frames.15Keystonebasementsystems.com. The Real Difference Between Cosmetic Cracks and Structural Foundation Damage In the UK, structural engineers assess crack severity using BRE Digest 251, which runs from category 0 (purely aesthetic) up to 5 (stability risk).16BRE Group. Assessing Cracks in Houses

What a Covered Claim Actually Costs You

Even when a claim succeeds, the excess is steep. Most UK buildings insurance policies carry a subsidence excess of around £1,000, well above the excess for other claim types.10Association of British Insurers. Subsidence Some policies set it as high as £2,500.14Lemonade. What Insurance Do I Need for Cracked Walls US earthquake insurance deductibles are higher still, typically 5% to 20% of the coverage limit.17California Department of Insurance. Earthquake Insurance

Underlying repair costs are a reality check too. Minor crack injections run $250 to $800. Underpinning a foundation runs $10,000 to $30,000 or more. A complete foundation replacement can top $100,000.18HomeGuide. Foundation Crack Repair Cost Policies also typically exclude external structures like garden walls, fences, patios, and driveways unless they are damaged at the same time and by the same cause as the main property.10Association of British Insurers. Subsidence

How to File a Claim

If the cracks look structural, the process generally follows a familiar path.

  • Report immediately. Contact your insurer as soon as you notice suspicious cracks; delay gives them grounds to question the claim.19InsuranceClaimSolutions.ie. Subsidence Damage Complete Guide
  • Document everything. Photographs from multiple angles with something for scale, and a written log of when cracks appeared and whether they have grown.19InsuranceClaimSolutions.ie. Subsidence Damage Complete Guide
  • Expect an investigation. A loss adjuster or surveyor will inspect, and the process can involve trial holes to check the foundations, CCTV of nearby drains, soil sampling, and crack monitoring over six to twelve months to account for seasonal movement.20Financial Ombudsman Service. Subsidence Types of Ground Movement
  • Prepare for a long timeline. From first report to completed repairs, subsidence claims can take 12 to 18 months.19InsuranceClaimSolutions.ie. Subsidence Damage Complete Guide

A structural engineer’s report is often essential. It should cover the damage’s scope and severity, include photographs and diagrams, assess safety, and recommend repairs. Homeowners typically arrange and pay for the inspection, roughly $400 to $800 in the US and from around £480 in the UK.21Wolfe Construction. Beyond the Surface: What to Expect From a Structural Engineering Inspection22Simplify Structures. Wall Crack Inspection In some cases, the insurer will cover the cost of expert investigations even if they conclude the problem is not subsidence.9Allianz. What Is Subsidence

If Your Claim Is Denied

Denials for cracked walls are common, usually on the basis that the damage is settlement, poor maintenance, or outside the covered perils. Several routes remain open.

  • Read the denial letter closely. If the insurer says the cracks are not subsidence, an independent structural engineer’s report contradicting that finding can force a reconsideration.23Financial Ombudsman Service. DRN-4938339 Decision
  • Appeal directly with the insurer, submitting the new evidence formally.
  • Escalate to an ombudsman. In the UK, the Financial Ombudsman Service handles disputes with insurers. In the US, complaints go to the state insurance department.24Angi. Does Homeowners Insurance Cover Foundation Repair
  • Consider a loss assessor. Unlike loss adjusters, who work for the insurer, loss assessors are hired by the homeowner to manage the claim and negotiate on their behalf, which can help when an insurer is pushing for cosmetic repairs rather than addressing a structural problem.25Harris Balcombe. Loss Adjusters vs Loss Assessors: What’s the Difference

One Financial Ombudsman decision illustrates how independent evidence changes the picture. A policyholder’s claim was rejected after AXA declined to send a surveyor based on photographs showing cracks on upper floors, which are not where subsidence damage typically appears first. The Ombudsman ruled the initial decision reasonable but said that if the homeowner obtained an independent expert report supporting a subsidence diagnosis, AXA would be required to reconsider.23Financial Ombudsman Service. DRN-4938339 Decision

Add-Ons That Fill the Gaps

In the UK, accidental damage cover is an optional extra that broadens protection beyond the named perils, though it still does not cover wear and tear, maintenance failures, or pre-existing issues.14Lemonade. What Insurance Do I Need for Cracked Walls The Financial Ombudsman has noted that when a storm damage claim is reasonably declined, the damage might still fall under the accidental damage section if the policy includes it.3Financial Ombudsman Service. Storm Damage

In the US, the earth movement exclusion means cracks caused by ground shifting, earthquakes, or landslides need separate earthquake insurance. Premiums vary enormously by location: frame homes in low-risk eastern areas can pay under $0.50 per $1,000 of coverage, while brick homes in the Pacific Northwest may pay $3 to $15 per $1,000.26Kentucky Department of Insurance. Consumer Guide to Earthquake Insurance Deductibles are high, and policies typically exclude land damage, fire, flood, masonry veneer, and pre-existing issues.17California Department of Insurance. Earthquake Insurance

Disclosure, Maintenance, and the Coal Mining Carve-Out

Anyone who has experienced subsidence must disclose it when buying or renewing insurance, with no time limit on that obligation. Failing to declare a subsidence history can invalidate the policy or lead to future claims being rejected.9Allianz. What Is Subsidence A subsidence history also has to be declared to buyers when selling a property. The UK TA6 Property Information Form asks about structural issues including subsidence and significant cracks, and non-disclosure can expose a seller to misrepresentation claims for up to six years after the sale.27Chancellors. What Do You Legally Have to Disclose Selling a House UK

Properties with a subsidence history face higher premiums, potentially stricter terms, and a market-value reduction that can range from negligible for minor, well-documented repairs to 25% or more for active or poorly evidenced problems.28Greater London Properties. How Much Does Subsidence Devalue a Property

Insurers also expect ongoing maintenance as a condition of coverage. Keep gutters clear, repair leaking drains, manage trees near the foundations, and keep records of the work. All of it protects both the property and the validity of a future claim.14Lemonade. What Insurance Do I Need for Cracked Walls

One special case to be aware of: damage caused by coal mining is excluded from standard UK home insurance. These claims go to the Mining Remediation Authority, which accepts damage notice forms, sends an engineer to inspect, and aims to decide within 90 days. Accepted claims result in repairs or compensation. Rejections can be appealed through the Centre for Effective Dispute Resolution for a £96 fee.29GOV.UK. Claim for Subsidence Damage Caused by Coal Mining

If You’ve Recently Switched Insurers

If you changed insurers and then noticed the cracks, the UK ABI Domestic Subsidence Claims Agreement decides who handles the claim. The previous insurer handles claims notified within eight weeks of the switch. Both insurers share costs for claims notified between eight weeks and one year. The current insurer takes full responsibility after one year.30Association of British Insurers. ABI Domestic Subsidence Claims Agreement and Guidelines The agreement was last updated in May 2017 and does not apply where the property has changed hands.