Jurisdiction(s):
United Kingdom

Key definition

Extension of time definition

What does Extension of time mean? An extension of time (EOT) is the contractual mechanism in a construction contract by which the completion date is moved, giving the contractor longer to finish the works without liability for delay or liquidated damages for the extended period. It is not defined by legislation; its scope and procedure are set by the building contract (for example JCT/SBCC, NEC, RIAI and Irish Public Works Contracts) and informed by case law on the prevention principle and time at large. Typically, the contractor must give prompt notice of delay and prove that a specified delay event (often called a relevant event or...

CPR 3.8(4) buffer agreements: practical guidance on agreeing extensions (28-day limit), avoiding hearing risk, and alternatives (England and Wales)

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Practice notes

This Practice Note examines when parties may agree to extend the period for complying with a rule, practice direction or court order that obliges them to take a step within a fixed timeframe and sets out the consequences of any default. For wider guidance on extensions of time, including matters falling outside CPR 3.8(4), see Practice Note: Extension of time. This Practice Note should also be read alongside material addressing the court’s response to party non-Compliance and applications for relief from sanction arising from such breaches, which can be found in: Compliance and relief from Sanctions—overview.

Agreeing an extension of time under CPR 3.8(4)

CPR 3.8(4) allows the parties, by prior written agreement, to extend the deadline for performing an act specified by the CPR or a court order where the consequences of failure are prescribed. Any such extension is limited to a maximum of 28 days and must not place any hearing date at risk (CPR 3.8(3) and CPR 3.8(4))...

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Web page updated on 21/05/2026

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