Courtney Hill Pty Ltd v South Australian Planning Commission

This matter came before the High Court of Australia on an application for special leave to appeal. The applicant, Courtney Hill Pty Ltd, sought leave to appeal against a decision of the Full Court of South Australia. The respondents were the South Australian Planning Commission, Consulere Pty Ltd, and The Corporation of the City of Munno Para. The dispute concerned the interpretation of a provision within the South Australian Planning Act relating to development plans and the assessment of proposed developments.

The central legal issue before the High Court was whether the determination of whether a proposed development is "seriously at variance" with a Development Plan is a question of law or a question of fact and degree. The applicant argued that the Full Court of South Australia, in a previous case, had determined this to be a matter of law, which supported their application for special leave to appeal to the High Court.

The applicant contended that the Development Plan is a pivotal document in the Planning Act, relied upon daily by local authorities, and that the interpretation of the phrase "seriously at variance" is of significant importance to the control of development in South Australia. The Chief Justice questioned whether this phrase lent itself to interpretation, suggesting it raised issues of fact and degree. However, the applicant highlighted the Full Court of South Australia's decision in *Reg v The City of Munno Para; ex parte John Weeks Pty Ltd*, which stated that the issue of "seriously at variance" was a matter of law, requiring courts to confine themselves to supervising the legality of the planning process rather than engaging with planning merits.