Certificate of non completion
The date for completion of construction works (or dates for completion of sections of the works) is generally set out in the contract particulars. However, it is not uncommon for delays to cause the completion date to be missed, that is, the works are not complete, and so a certificate of practical completion cannot be issued by the date for completion.
Some contracts (such as the JCT Standard Form of Building Contract) require that the contract administrator issues the contractor with a certificate of non-completion (sometimes referred to as a ‘non-completion certificate’ or ‘non-completion notice') as a pre-requisite to claiming liquidated and ascertained damages. The certificate of non-completion gives formal written notice to the contractor that they have failed to complete the works described in the contract by the completion date that was last agreed (the original completion date may have been adjusted during the course of the works).
The contract administrator must give due consideration to any applications for extension of time before issuing a certificate of non-completion, and if there are subsequent extensions of time that result in the completion date being adjusted, and the contractor then fails to meet this adjusted date, a new certificate of non-completion must be issued.
Where the contract provides for sectional completion of the works, separate certificates of non-completion must be issued for each section that is not completed by the required date.
The client may then deduct liquidated and ascertained damages from payments otherwise due to the contractor, providing that an appropriate notice has been issued (a pay less notice) setting out the basis of the calculation. Contractors may challenge claims for liquidated and ascertained damages if the procedures and the notice periods set out in the contract have not been followed.
 Related articles on Designing Buildings Wiki
- Certificate of practical completion.
- Construction contract.
- Contract administrator.
- Extension of time.
- Liquidated and ascertained damages.
- Loss and expense.
- Pay less notice.
- Practical completion.
- Topping out.
 External references
- Standard forms for certificates of non completion are available – eg RICS Certificate of Non-Completion.
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