In Prosker Pty Ltd v Mosman Municipal Council [2026] NSWLEC 1648, the Land and Environment Court dismissed an appeal concerning an eight-storey residential flat building at 48-50 Almora Street, Mosman. The proposal comprised 14 apartments, including three affordable housing units, above three basement levels.

Although the proposal complied with the height and floor space ratio available under the State Environmental Planning Policy (Housing) 2021 (Housing SEPP), the Court found that it was incompatible with the desired future character of the precinct and represented an overdevelopment of the site.

The proposal attracted substantial community opposition, including 444 submissions following its amendment and re-notification.

Key findings

1. Housing uplift remains subject to site-specific assessment

The site was within a low and mid-rise housing inner area. The Housing SEPP therefore provided non-discretionary standards of 22 metres in height and a floor space ratio of 2.2:1. Because the proposal included affordable housing, it also relied on the maximum 30% bonus available under the infill affordable housing provisions, resulting in a maximum height of 28.6 metres and FSR of 2.86:1. The parties agreed that the proposal complied with those numerical controls.

However, the Court found that numerical compliance did not resolve the assessment required by the Housing SEPP. Section 20(3) required consideration of whether the design was compatible with the desired future character of a precinct undergoing transition. The residential apartment design provisions also required consideration of context, neighbourhood character, building form and scale.

2. The broader precinct and the need for transition

The Court accepted that the relevant ‘precinct’ included both the land to which LMR provisions applied and surrounding land to which they did not. This included the adjoining C4 Environmental Living zone and nearby heritage items.

The Court therefore considered the full suite of planning controls that would shape the area’s future character. While the upper Balmoral slopes were expected to accommodate higher-density development, the lower slopes within the C4 zone would remain low density. Nearby heritage items would also remain part of the precinct. The desired future character was therefore mixed, rather than uniformly mid-rise.

This broader context was particularly important because the site was near the edge of the LMR inner area. One lot to the east, within the C4 zone, had an 8.5 metre height limit and maximum FSR of 0.5:1. There was no intervening LMR outer area to provide a gradual step down in scale.

Against that context, the Court found that the proposed eight-storey, 28.6 metre building did not provide an adequate transition to the neighbouring low-scale development. The two additional storeys enabled by the affordable housing bonus further exacerbated the abrupt change in scale. The proposal was therefore incompatible with the desired future character of the precinct.

As the site was located at the edge of the LMR inner area, its development needed to respond to its future context, including neighbouring low-scale development that would remain and nearby heritage items. This was an inherent site constraint.

The Court observed that an appropriately designed six-storey building within the 22-metre standard could conceivably provide an adequate transition, although it made no concluded finding on that issue.

The building’s siting and scale also contributed to the finding of overdevelopment. Particular concerns included inadequate separation along the eastern and southern boundaries, insufficient landscaping at the eastern interface and impacts on the Almora Street public view corridor.

3. Views and heritage provided additional grounds for refusal

The Court found that the proposal would unacceptably enclose the significant public view along Almora Street towards Middle Harbour. Although some private view loss was inevitable under the changed planning controls, a development better suited to the site’s capacity and desired future character could reduce those impacts and provide better view sharing.

The Court also found that the proposal would overwhelm the adjoining heritage item at 52 Almora Street, diminish its streetscape presence and adversely affect its heritage significance. The proposed podium and tower treatment did not meaningfully mitigate the scale disparity. These view and heritage impacts were secondary findings supporting refusal.

Implications

The decision highlights that the development potential created by the Housing SEPP must still be tested against the opportunities and constraints of a particular site. The maximum height and FSR available under the low and mid-rise and affordable housing provisions do not, by themselves, establish an acceptable built form.

A proposal must respond to its broader context, including neighbouring zones and development, heritage items and significant view corridors. The assessment of desired future character may extend beyond the mapped LMR area to land that will remain lower in scale. This is particularly important for edge sites where the planning controls do not provide an intermediate step down between uplift land and adjoining low-density areas.

For developers and consultants, early design testing should consider whether the maximum uplift can be accommodated while providing an appropriate transition through the building’s height, massing, setbacks and landscaping.

The decision may be contrasted with the Court’s recent decision in Prosper Land St Georges Crescent Drummoyne Pty Limited v City of Canada Bay Council [2026] NSWLEC 1628, where consent was granted for a nine-storey affordable housing development. In Prosper, the Court accepted that the proposal’s height, scale and building envelope were consistent with the desired future character of a precinct undergoing transition. Prosker, however, demonstrates that character remains a site-specific consideration under the Housing SEPP uplift, with different site contexts and localities producing different outcomes.

The decision does not preclude affordable housing bonuses at transition sites. It indicates, however, that achieving the maximum uplift will depend on whether the resulting design responds appropriately to the site’s constraints and future context.

This article was written by John Paul Merlino, Partner, and Emma Goktas, Graduate.