Common refusals of extensions of time
Construction contracts generally allow the construction period to be extended where there is a delay that is not the contractor's fault. This is described as an extension of time (EOT).
When it becomes reasonably apparent that there is, or that there is likely to be, a delay that could merit an extension of time, the contractor should give written notice to the contract administrator identifying the relevant event that has caused the delay. If the contract administrator accepts that the delay was caused by a relevant event, then they may grant an extension of time and the completion date is adjusted.
Common reasons for the refusal of an application for extensions of time include:
- Where the contractor has underperformed, for example, as a result of insufficient workforce or failure to obtain plant, goods or service.
- When there has been poor, but not exceptionally adverse weather.
- When the evidence or other information presented to demonstrate that the contractor has suffered irrecoverable delays is insufficient.
- If an extension of time has already been given for that event.
- Where more than one event occurs at the same time. See Concurrent delay for more information.
- The event cited does not constitute a relevant event.
- An event does not constitute force majeure.
- An event does not constitute a specified peril.
- The contractor has not taken steps to mitigate the delay
[edit] Related articles on Designing Buildings Wiki
- Acceleration of construction works.
- Change order.
- Compensation event.
- Contract administrator.
- Contract claims.
- Culpable delay.
- Delay damages.
- Extension of time.
- Extension of time - approval letter example.
- How to prepare a claim for an extension of time.
- Practical completion.
- Project programme.
- Time certainty.
- Time extension.
- Time Risk Allowance TRA.
- Variations.
Featured articles and news
A case study and a warning to would-be developers
Creating four dwellings... after half a century of doing this job, why, oh why, is it so difficult?
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.
IHBC planning for growth with corporate plan development
Grow with the Institute by volunteering and CP25 consultation.
Connecting ambition and action for designers and specifiers.
Electrical skills gap deepens as apprenticeship starts fall despite surging demand says ECA.
Built environment bodies deepen joint action on EDI
B.E.Inclusive initiative agree next phase of joint equity, diversity and inclusion (EDI) action plan.
Recognising culture as key to sustainable economic growth
Creative UK Provocation paper: Culture as Growth Infrastructure.






















