Costains Australia Limited v Finlay

Costains Australia Limited 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 the final payment due to the respondent, Mr. Finlay, who had acted as a subcontractor.

The primary legal issue before the Court of Appeal was whether the clause in question, which dealt with the adjustment of the contract price for variations, operated to limit the subcontractor's entitlement to payment for work performed beyond the original scope of the contract, even if that work was authorised. The court also considered the principles of contractual interpretation in the context of construction agreements.

The Court of Appeal, in its reasoning, emphasised the importance of construing contractual clauses in a manner that gives effect to the clear intention of the parties. It held that the clause in question, when read in its entirety and in conjunction with other relevant provisions of the contract, did not preclude the subcontractor from claiming payment for authorised variations that exceeded the original contract sum. The court applied established principles of contractual interpretation, focusing on the plain meaning of the words used and the overall context of the agreement, to determine that the subcontractor was entitled to payment for the additional work performed.

The appeal was dismissed, and the decision of the Supreme Court was affirmed.