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Last edited 08 Mar 2021
How to prepare a claim for an extension of time
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 gives written notice to the contract administrator identifying the relevant event that has caused the delay, requesting the extension of time, presenting the reasons, and referencing the contract clause that allows the request. This letter is then assessed by the contract administrator (perhaps with input from the consultant team) before approval or rejection. If it is approved, the letter is given a written answer, and a change order is issued.
Sometimes, contracts may require the submission of requests within a specific time, otherwise, they can be rejected.
Proving delay and/or disruption can be a complicated and time-consuming process, and the quality of the information provided and the records available are often the key to successful claims. The claim should adequately establish both causation and liability, as well as the extent of the damages/disruption experienced by the contractor as a direct result of the delay.
To be able to do this effectively, the contractor should produce an accurate baseline programme before work begins, for progress to be monitored. The programme should show the planned productivity rates for the different work activities and appropriate benchmarks. As construction projects are naturally dynamic and subject to change, the programme should be continually updated and revised to reflect the current project conditions. This can enable the contractor to determine what effect a delay is likely to have on their ability to complete activities, making it easier to prepare their claim.
- When the event occurred.
- Why it occurred.
- The tasks that it affected and the reasons why.
- The resources that it required.
- A list of the affected activities from the schedule.
- Any other activities that were carried out, either on- or off-site, as a result.
- Sketches, photographs and plans.
- Details of actions taken by the contractor to avoid or minimise delays.
- Alternative solutions and/or a proposed recovery plan.
- Communications between the construction team relating to possible delays.
All costs which are associated with delay events should also be recorded wherever possible. Demonstrating a causal link between an event and subsequently incurred costs will make it more likely the claim will be approved.
The submitted claim should be concise, accurate and as clear as possible. It should explain the delay event and the sequence of events surrounding it, all of which should be cross-referenced to records, i.e. the programme. Retrospective delay analysis should be avoided if possible and used with caution if necessary.
Claim requests should also consider the following:
- Working days are different from calendar days.
- The reissuing of insurances and other bonds to cover extended periods.
- Summer days tend to be longer and more productive than winter days.
- Whether the extension of time being requested will be sufficient to cover all delays.
- The nature of the proposed changes and their ramifications.
- Once an extension of time has been approved, no additional time will be granted for the same item.
- Only one claim is necessary for a continuing delay.
 Delay analysis methods
- Impacted as-planned.
- Collapsed as-built.
- As-planned vs as-built.
- Time slice windows analysis.
- Time impact analysis.
- Longest path analysis.
 What the contractor is entitled to claim
 Related articles on Designing Buildings Wiki
- Acceleration of construction works.
- Change order.
- Common refusals of extensions of time.
- Compensation event.
- Contract administrator.
- Contract claims.
- Delay damages.
- Extension of time.
- Extension of time - approval letter example.
- Practical completion.
- Project programme.
- Time certainty.
- Time Risk Allowance TRA.
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