Probuild Constructions (Aust) Pty Ltd v DDI Group Pty Ltd

Probuild Constructions (Aust) Pty Ltd sought to challenge an adjudication determination made by an adjudicator under the Building and Construction Industry Security of Payment Act 1999 (NSW). The determination had resolved a dispute between Probuild, the head contractor, and DDI Group Pty Ltd, the sub-contractor, regarding the latter's entitlement to an extension of time and associated liquidated damages. The Supreme Court of New South Wales was tasked with determining whether the adjudicator had acted unfairly by rejecting Probuild's set-off claim based on grounds that were neither argued nor notified to the parties. Specifically, the adjudicator had ruled that Probuild, acting reasonably, should have granted DDI an extension of time, thereby rejecting Probuild's claim for liquidated damages.

The primary legal issues before the court were whether the adjudicator had denied procedural fairness by deciding the set-off claim on grounds that were not presented during the adjudication and whether these grounds were sufficiently communicated to the parties. Probuild argued that it was entitled to rely on the sub-contractor's unreasonable claim for liquidated damages as a basis for its set-off, a point that was not contested or raised by DDI. The court needed to consider if the adjudicator's decision was based on a misinterpretation of the submissions made and whether such an error constituted a breach of procedural fairness.

The court concluded that the adjudicator had not denied procedural fairness by deciding the set-off claim on the basis that Probuild should have reasonably granted an extension of time. It found that the adjudicator's reasoning was consistent with the submissions and the overall context of the dispute. The court held that the adjudicator had acted within his authority and did not err in his interpretation of the relevant submissions. Consequently, the application to quash the adjudication determination was dismissed.

The Supreme Court did not make any further orders beyond dismissing Probuild's application. The adjudication determination remained in effect, and DDI was not required to pay the liquidated damages to Probuild as per the adjudicator's ruling.