Mandurah Enterprises Pty Ltd & Ors v Western Australian Planning Commission

Mandurah Enterprises Pty Ltd and others (the applicants) sought judicial review of a decision by the Western Australian Planning Commission (the respondent) to refuse their application for development approval for a proposed residential subdivision. The applicants contended that the Commission had failed to consider relevant matters and had taken into account irrelevant considerations when making its decision.

The primary legal issue before the Full Federal Court was whether the Commission had acted unlawfully in refusing the development approval. Specifically, the Court was required to determine whether the Commission had properly considered the matters it was obliged to take into account under the relevant planning legislation, and whether it had improperly taken into account considerations that were outside the scope of its statutory powers.

The Court found that the Commission had erred in its decision-making process. It held that the Commission had failed to give adequate weight to the planning merits of the proposal and had instead focused on matters that were not within its statutory remit, such as the potential for future commercial development on adjacent land. The Court reiterated the principle that planning authorities must act within the scope of their statutory powers and consider all relevant matters while disregarding irrelevant ones.

The Court allowed the appeal, quashed the Commission's decision, and remitted the matter back to the Commission for reconsideration according to law.