Duty to warn in construction
There is no general duty to warn in English law, however, there are circumstances in which such a duty can exist.
There may be a duty of care in tort to warn a third party of a known potential danger, and where there is a contract, a duty to warn may extend to dangers of which a party ought to have been aware.
In Cleightonhills v Bembridge Marine (2012) , Mr Justice Akenhead stated that “In my view, there can be little doubt that a failure to warn in the case of potential danger to human beings may give rise to a breach of any duty of care owed to a third party by a party who knows of the danger. I use the word "may" because it is necessary always to review all the circumstances and there might be circumstances which justify not warning. Where the parties are in contract, the duty to warn may extend to dangers of which the party in question should have been aware by reason of its involvement.”
Where there is a danger to health and safety, it may not be enough to simply warn of the danger, it may be necessary to do so vigorously, or to refuse to proceed with the works. In Plant Construction plc v Clive Adams Associates and JHM Construction Services Ltd, JHM did warn of problems but were found to be in breach anyway because they had not protested enough.
In addition, there may be a limited express duty to point out discrepancies in the contract documents.
These duties are fairly restricted; it must be reasonable to impose a duty to warn in the circumstances. However, it is an evolving area of law, and it is possible in the future that the courts could extend the duty to warn to broader commercial issues, rather than just where there is a potential danger.
NB: On NEC contracts, both parties must give early warning of anything that may delay the works, or increase costs. They should then hold an early warning meeting to discuss how to avoid or mitigate impacts on the project. In the case of a compensation event, if the contractor fails to give early warning of a possible delay to the works, or increase in costs, they will only be compensated for effects that would have remained anyway even if they had given early warning.
[edit] Related articles on Designing Buildings Wiki
- Brown v KMR Services Ltd.
- Causation.
- Compensation event.
- Duty of care.
- Early warning notice.
- Good faith.
- Independent Broadcasting Authority v EMI Electronics Limited and BICC Construction Ltd.
- Plant Construction plc v Clive Adams Associates and JHM Construction Services Ltd.
- Reasonable skill and care
- Sidaway v Governors of Bethlem Royal Hospital.
- Tort.
[edit] External references.
Featured articles and news
Plumbing and heating for sustainability in new properties
Technical Engineer runs through changes in regulations, innovations in materials, and product systems.
Awareness of the Carbon Border Adjustment Mechanism
What CBAM is and what to do about it.
The new towns and strategic environmental assessments
12 locations of the New Towns Taskforce reduced to 7 within the new towns draft programme and open consultation.
Buildings that changed the future of architecture. Book review.
The Sustainability Pathfinder© Handbook
Built environment agency launches free Pathfinder© tool to help businesses progress sustainability strategies.
Government outcome to the late payment consultation, ECA reacts.
IHBC 2025 Gus Astley Student Award winners
Work on the role of hewing in UK historic conservation a win for Jack Parker of Oxford Brookes University.
Future Homes Building Standards and plug-in solar
Parts F and L amendments, the availability of solar panels and industry responses.
How later living housing can help solve the housing crisis
Unlocking homes, unlocking lives.
Preparing safety case reports for HRBs under the BSA
A new practical guide to preparing structural inputs for safety cases and safety case reports published by IStructE.
Male construction workers and prostate cancer
CIOB and Prostate Cancer UK encourage awareness of prostate cancer risks, and what to do about it.
The changed R&D tax landscape for Architects
Specialist gives a recap on tax changes for Research and Development, via the ACA newsletter.
Structured product data as a competitive advantage
NBS explain why accessible product data that works across digital systems is key.
Welsh retrofit workforce assessment
Welsh Government report confirms Wales faces major electrical skills shortage, warns ECA.
A now architectural practice looks back at its concept project for a sustainable oceanic settlement 25 years on.
Copyright and Artificial Intelligence
Government report and back track on copyright opt out for AI training but no clear preferred alternative as yet.
Embedding AI tools into architectural education
Beyond the render: LMU share how student led research is shaping the future of visualisation workflows.
Why document control still fails UK construction projects
A Chartered Quantity Surveyor explains what needs to change and how.
Inspiration for a new 2026 wave of Irish construction professionals.
New planning reforms and Warm Homes Bill
Take centre stage at UK Construction Week London.

























