Barclay Mowlem Construction Ltd v Donaldson

Barclay Mowlem Construction Ltd appealed to the New South Wales Court of Appeal against a decision of the Supreme Court of New South Wales. The dispute concerned the interpretation of a clause within a building contract, specifically regarding the calculation of a liquidated damages amount payable by the respondent, Donaldson, to the appellant, Barclay Mowlem.

The primary legal issue before the Court of Appeal was whether the liquidated damages clause in the contract was void for uncertainty or as a penalty. This required the court to consider the principles governing the enforceability of liquidated damages provisions in contracts, particularly where the stipulated sum might be disproportionate to the likely loss.

The Court of Appeal, applying established common law principles, found that the clause was not void for uncertainty. It reasoned that the parties had clearly agreed to a specific mechanism for calculating liquidated damages, and the fact that the calculation might lead to a sum that was difficult to ascertain precisely did not render it uncertain. Furthermore, the court determined that the clause did not operate as a penalty because the stipulated sum was a genuine pre-estimate of the loss likely to be suffered by Barclay Mowlem in the event of Donaldson's delay. The court distinguished this situation from cases where a stipulated sum is extravagant and unconscionable, or where it is designed to deter performance rather than compensate for loss.

The appeal was dismissed, with the Court of Appeal upholding the Supreme Court's interpretation of the liquidated damages clause.