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🏗️ '''Latent defects insurance''' is a type of [[Definition:Construction insurance | construction-related]] coverage that protects building owners, purchasers, and sometimes tenants against the cost of repairing structural defects that are hidden at the time of completion and only manifest after the building is occupied. Unlike [[Definition:Professional indemnity insurance | professional indemnity]] policies that require proving fault by a specific design professional or contractor, latent defects insurance — often referred to as inherent defects insurance (IDI) or décennale (its French-law equivalent) — is a first-party, non-fault policy that responds when a qualifying structural defect is discovered, without requiring the policyholder to litigate against the responsible party. This makes it particularly valuable in real estate transactions, where clean title to defect protection facilitates sales and lending.

🔩 The policy is typically arranged during the construction phase by the developer or building owner and is underwritten on the basis of independent technical audits conducted throughout the build. A specialist [[Definition:Technical auditor | technical control]] body inspects the design and construction at key stages — foundations, structural frame, weatherproofing — and issues a certification upon which the [[Definition:Underwriter | underwriter]] relies when binding coverage. The policy then attaches at practical completion and runs for a long tail, commonly ten to twelve years, covering the structural elements of the building including foundations, load-bearing walls, roofs, and sometimes the building envelope. In France, the guarantee décennale is a statutory requirement under the Civil Code, making it a compulsory feature of the construction insurance landscape. In the United Kingdom and other common-law markets, latent defects insurance is voluntary but has become a standard expectation in major commercial and residential developments, particularly where institutional investors or mortgage lenders require it as a condition of financing.

💡 For the insurance industry, latent defects policies represent a long-tail [[Definition:Underwriting | underwriting]] commitment that demands strong technical expertise and close collaboration with engineering and construction professionals. [[Definition:Reserving | Reserving]] for these policies can be challenging, since claims may not emerge for years after the policy is written and the cost of structural remediation can be substantial. The product also intersects with [[Definition:Warranty and indemnity insurance (W&I) | warranty and indemnity]] considerations in real estate mergers and acquisitions, where buyers seek assurance that building defects will not become unfunded liabilities post-closing. As green building standards and novel construction methods — such as modular and mass-timber construction — introduce new structural risk profiles, underwriters in this class are adapting their technical audit requirements and coverage terms to keep pace with evolving building practices.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Construction insurance]]
* [[Definition:Professional indemnity insurance]]
* [[Definition:Builders risk insurance]]
* [[Definition:Warranty and indemnity insurance (W&I)]]
* [[Definition:Decennial liability insurance]]
* [[Definition:Structural warranty]]
{{Div col end}}

Definition:Latent defects insurance - Revision history

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