Mainbush Pty Ltd and Shire Of Mundaring

In the matter of Mainbush Pty Ltd versus the Shire of Mundaring, the dispute revolved around the interpretation and application of local planning schemes and development standards in Western Australia. The case was heard in the Court of Appeal, with Mainbush Pty Ltd appealing against a decision by the Shire of Mundaring to refuse development approval for a proposed project involving 37 grouped dwellings. The central legal issues before the court were whether the residential density code that applies to land and the minimum and average site areas stipulated by the Residential Design Codes of Western Australia (2002) could be varied under the local planning scheme, and whether these codes were standards or requirements prescribed by the local planning scheme.

The court was required to determine whether the residential density code and the minimum and average site areas could be subject to variation by the local planning scheme. This involved interpreting the relevant statutory provisions and assessing whether the codes in question could be considered as standards or requirements under the local planning scheme. The court considered the statutory framework, including the provisions of the Planning and Development Act 2005 (WA), and the relevant planning instruments, including the Residential Design Codes of Western Australia (2002). It also examined the role of the local planning scheme in varying standards and requirements, and the extent to which these could be altered to accommodate specific development proposals.

The court concluded that neither the residential density code that applies to land nor the minimum and average site areas stipulated by the Residential Design Codes of Western Australia (2002) could be varied under the local planning scheme. Furthermore, the court found that these codes were not standards or requirements prescribed by the local planning scheme. The court held that the local planning scheme could not override the statutory provisions and standards set out in the Residential Design Codes, and that any proposed variation would require legislative change rather than a variation under the local planning scheme. As a result, the appeal was dismissed, and the decision of the Shire of Mundaring to refuse development approval for the proposed project was affirmed.