A latent defect is a construction fault that is not reasonably apparent when a project is completed. It can involve design, materials or workmanship, and may emerge months or years later. Examples include water ingress caused by inadequate waterproofing, structural movement, defective foundations and failures in cladding or roofing systems.
Harper James is a UK full-service commercial law firm advising businesses, including those involved in construction, on the laws of England and Wales. The legal position depends on the construction contract, warranties, insurance policies, statutory duties and the evidence available when the defect is discovered.
Latent defects insurance, also known as structural warranty insurance, is generally designed to cover specified physical defects in a completed building. Policies commonly respond to the cost of repairing or rectifying insured defects, subject to their terms, exclusions, excesses and policy limits. Some policies also cover defined defects in foundation or structural elements, while others provide wider protection.
This cover is different from construction all-risks insurance, which usually addresses accidental physical loss or damage during construction. It is also different from professional indemnity insurance, which responds to certain claims against design professionals for negligent professional services. Contractor liability insurance addresses particular liabilities arising from the contractor’s work, but does not automatically provide cover for every defect.
Insurance does not replace contractual rights. A building owner should review the building contract, consultant appointments, collateral warranties, manufacturer warranties and any defects liability provisions. These documents determine who is responsible, what standard applies, how claims must be notified and whether liability is limited.
The first step is to record the defect and preserve evidence. Photographs, drawings, specifications, inspection records, correspondence, invoices and completion documents can establish when the problem appeared and what work was undertaken. The owner should take reasonable steps to prevent further damage, while avoiding repairs that destroy evidence before inspection.
The policyholder should then check notification requirements and inform the insurer within the stated period. An insurer may appoint a loss adjuster or technical expert. The owner should also notify potentially responsible contractors, consultants or manufacturers under the relevant contracts and warranties. Independent expert evidence is often needed to identify the cause, the appropriate remedy and the cost of repair.
Time limits require early attention. Contractual claims are subject to limitation provisions, and statutory claims have their own rules. The Defective Premises Act 1972 applies to qualifying claims concerning the provision of dwellings, with limitation periods amended by the Building Safety Act 2022. The availability of a claim depends on the facts, the type of building and the work involved.
Before construction starts, parties should confirm who will procure latent defects insurance, the insured parties, the period of cover, the scope of insured elements, exclusions, excesses and the process for making a claim. The contract should also address inspections, design responsibility, testing, handover documents, retention, defects correction and access for investigation.
At completion, the owner should retain the policy, schedule, certificate, as-built drawings, operation and maintenance manuals, warranties and sign-off records. A clear document trail makes it easier to distinguish an insured defect from ordinary maintenance, wear and tear or damage caused by later works. The appropriate remedy will depend on the policy wording and the contractual and statutory rights available on the facts.