Civil and Precast Construction · Question

Who is liable if a structural defect appears after handover?

Short answer

Responsibility depends on the cause and on your contract, but it may fall on the contractor for faulty workmanship or materials, the designer for design errors, or a developer or seller under local law. Contracts usually set a defect liability period for repairs, and the law may extend liability for serious structural problems. Owners should document the defect early and take professional advice.

In more detail

A structural defect is a fault affecting the strength or stability of a building, such as unusual deflection, settlement or large cracks in load-bearing elements. Finding who is answerable starts with finding why it happened.

Possible causes and likely responsible parties include:

Poor workmanship, wrong materials or skipped quality checks, which point to the contractor.
Errors in structural design or calculations, which point to the designer.
Unsuitable foundation advice or incorrect ground data, which may involve the geotechnical agency or designer.
Changes made by the owner or later occupiers, such as removing walls or adding loads, which can shift responsibility to the owner.
Unusual events or lack of maintenance, which are generally outside the builder's scope.

Contracts commonly include a defect liability period after handover, during which the contractor must fix defects at its cost, and part of the payment may be held back as retention for this. After that period, liability may still arise under general law or under the rules governing developers and sellers in your state, and limits for bringing a claim vary.

Professional indemnity cover for designers, and insurance held by the contractor, can help meet claims, but only where the policy applies.

Build your record from day one

Keep drawings, test reports, inspection records, completion certificates and written instructions. Photographs of the defect with dates help, and so does a written complaint to the contractor.

When a defect appears, do not carry out repairs yourself first. Inform the responsible parties in writing, arrange a joint inspection and have an independent structural engineer give a written opinion. Legal advice is appropriate before any claim; this page is general information, not legal advice, and outcomes depend on facts and the governing law.

Key points

Liability follows the cause: construction, design, ground advice or later alterations.
Contracts set a defect liability period; general law may extend responsibility.
Records of drawings, tests and instructions strengthen any later claim.
Report defects in writing and obtain independent engineering opinion before repair.

Who this applies to

Owners of recently completed factories, warehouses or commercial buildings.
Buyers of property from developers who see early structural distress.
Contractors and designers wanting to know their exposure after handover.

Last reviewed 3 October 2026

This answer is general information, not advice on your particular case. Terms, eligibility, and requirements change, so check the current position with the relevant institution or authority.