Lumbers v W Cook Builders Pty Ltd (in liq)

The High Court of Australia considered an appeal by the Lumbers against W Cook Builders Pty Ltd (in liq) concerning a claim for payment arising from the construction of a domestic dwelling. The Lumbers had entered into an oral agreement with W Cook Builders Pty Ltd for the construction, but the respondent company, a related entity, performed some of the work and paid subcontractors. The dispute centred on whether the respondent could claim compensation from the Lumbers for the difference between the amounts paid by the Lumbers and the respondent's outlays, plus a margin for supervision and profit, particularly as the Lumbers had not requested the respondent to perform services or pay subcontractors directly.

The legal issues before the High Court included whether the respondent was entitled to recover compensation on the basis of a claim in *quantum meruit* or for money paid, and whether a claim for restitution based on unjust enrichment was available. Specifically, the court had to determine if the Lumbers had accepted a benefit from the respondent's work and expenses in circumstances where it would be unconscionable for them to retain that benefit, notwithstanding that they had not made a direct request to the respondent. The court also considered the effect of an informal reorganisation within the building company's corporate group, where the benefit and burden of the oral agreement were informally assigned to the respondent company without notice to the Lumbers.

The High Court allowed the appeal, setting aside the orders of the Full Court of the Supreme Court of South Australia. The court reasoned that the respondent's claims failed because the Lumbers had not requested the respondent to perform the work or incur expenses, nor had they freely accepted the benefit of the respondent's services in circumstances that would give rise to an obligation to pay. The court found that the Lumbers had met all progress claims and paid all monies due under the oral agreement to the original building company. The informal reorganisation and assignment of the contract within the corporate group, without notice to the Lumbers, did not create a direct contractual or restitutionary liability on their part to the respondent. The court emphasised that the principles of unjust enrichment require more than simply receiving a benefit; there must be an absence of a request or a free acceptance of the benefit, which was not established in this case.

The High Court ordered that the appeal to the Full Court of the Supreme Court of South Australia be dismissed with costs.