Waltons Stores (Interstate) Ltd v Maher [1988]

Waltons Stores (Interstate) Ltd v Maher [1988] HCA 7 is a significant case in Australian contract law, establishing that estoppel, under certain circumstances, can be a cause of action. The case revolves around representations made during negotiations for a lease of Maher's property to Waltons Stores, where Maher relied on these representations to his detriment.

Maher owned property in Nowra and was negotiating a lease with Waltons Stores. Based on representations made before the completion of the contract, Maher demolished an existing building and began constructing a new one. However, the contract was never completed as Waltons Stores did not sign the lease due to Maher's hostile behaviour. Waltons Stores allowed Maher to believe the deal would proceed while slowing down the process for further investigations.

The Australian High Court held that, to avoid detriment resulting from Waltons' unconscionable behaviour, Waltons was estopped from denying the existence of the contract. The court emphasised two elements that made Waltons' conduct unconscionable: the element of urgency and Maher's assumption that execution by Walton was a formality. The court awarded Maher damages, akin to reliance interest, covering the costs incurred due to his reliance on Waltons' representations.

Brennan J highlighted the differences between a contractual obligation and an equity created by estoppel. Unlike a contract, an equity created by estoppel may be imposed irrespective of an agreement and does not require strict consideration. Promissory estoppel's remedy was initially limited to preventing the enforcement of existing legal rights, but Brennan J questioned the logical distinction between using it as a shield or a sword. The judgment emphasised that promissory estoppel extends to the enforcement of voluntary promises, considering departures from the basic assumptions of a transaction to be unconscionable.

In conclusion, this case highlights the principle that estoppel can be a cause of action in Australian contract law, particularly when a party's unconscionable conduct leads to the other party's detriment. The case contributes to the development of the doctrine of promissory estoppel, allowing for the enforcement of voluntary promises under specific circumstances.
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