Perum Building & Construction Pty Ltd v Tallenford Pty Ltd

Perum Building & Construction Pty Ltd (the contractor) brought an action against Tallenford Pty Ltd (the principal) claiming that the principal was unjustly enriched by the completion of a construction project for an amount greater than the contract price. The contractor argued that despite the completion of the project, the principal had not paid the full amount specified in the contract. The case was heard in the Supreme Court of New South Wales.

The legal issues before the court were whether the contractor's claim of unjust enrichment was valid and, if not, what the proper basis for the contractor's entitlement to remuneration was. The court had to determine whether the contractor could recover the difference between the contract price and the value of the completed construction work, or if the contractor's entitlement was strictly governed by the terms of the contract.

The court found that there was no basis for a claim of unjust enrichment. It held that the entitlement of the contractor to remuneration was determined by the contract terms, which explicitly stated the payment obligations of the principal. The court rejected the contractor's argument that the value of the completed construction work should be considered outside the contract terms. The court emphasised that the agreement between the parties was the sole determinant of the contractor's rights and obligations.

The court allowed the appeal and ruled in favour of the principal. The contractor's claim for unjust enrichment was dismissed, and the principal was not required to pay any additional amount beyond what was specified in the contract. The court's decision underscored the importance of adhering to the terms of a contract and the limited circumstances in which a claim of unjust enrichment may be valid.