Mount Lawley Pty Ltd v Western Australian Planning Commission

Mount Lawley Pty Ltd brought proceedings in the Supreme Court of Western Australia, challenging the valuation of land that had been reserved and subsequently acquired by the Western Australian Planning Commission. The central dispute was the appropriate basis for valuing the land for compensation purposes, considering factors such as the time elapsed between reservation and acquisition, the utility of expert knowledge gained post-acquisition, the environmental significance of the land, and the potential for development. The Court was tasked with determining whether the environmental significance of the land precluded its development potential, the extent of this potential, and whether the landscape should be viewed as an integrated whole that precludes development. Additionally, the Court needed to establish whether the price payable by a hypothetical purchaser should include a premium for development potential and if interest should be payable on the compensation.

The Court of Appeal meticulously examined the legal principles established in Sydney Harbour Foreshore Authority v Walker Corporation Pty Ltd, which emphasised the importance of asking the right questions when determining the value of land for compensation purposes. The Court held that the trial judge's failure to consider the existing zoning and its impact on the land's value was a critical error. The Court of Appeal found that the value of the land, with all its inherent characteristics, must be considered in its physical location and the surrounding developments. The inherent characteristics of the land, such as environmental significance, can diminish its value or constrain an increase in value, independent of any resumption proposal. The Court concluded that the diminution in value was due to the inherent characteristics of the land, not the proposed resumption.

Based on the Court's reasoning, it ordered a retrial to correctly assess the land's value. The Court highlighted that the maintenance of the industrial/waterfront zoning was a relevant matter that was not considered. The Court stressed that the value of the land should be assessed based on its physical location, surrounding developments, and inherent characteristics, including social preferences and environmental factors. The trial judge was directed to disregard the zoning only if the refusal to rezone was part of the proposal to acquire the land for the public purpose or a step in the carrying out of that public purpose. The Court of Appeal's decision underscored the necessity of a thorough and principled approach to land valuation in compensation cases.