Mosman’s new local planning reforms have faced their first real test in the NSW Land and Environment Court, with two appeals knocked back. The outcomes cast doubt on the usefulness of the reforms introduced by Mosman Council as an alternative to state government housing rules.
Transitional areas test the new rules
The first case involved Prosker, a Sydney boutique developer, and an eight-storey residential building on 48-50 Almora Street. The developer appealed the deemed refusal after the council did not determine the application within the allotted timeframe. The council argued the project was incompatible with local character due to excessive height, bulk, and scale, as well as view and heritage impacts.
The site sits in a medium density zone under the Mosman Local Environment Plan but borders a low density zone and is one lot away from an environmental living zone. The development relied on SEPP 2021 for Housing, which allows floor space ratio and height bonuses for the inclusion of affordable housing, of which there were three units in the planned building. Despite the site being on the fringe of a transitional area where the LMR provisions apply, the LEC acting commissioner, Helena Miller, dismissed the appeal. She ruled the development was not consistent with the desired character of the precinct and failed to account for neighbouring low-scale development and nearby heritage items.
These first court outcomes for Mosman projects come after the council endorsed its own LMR plan in August 2026, reshaping density in the affluent Lower North Shore suburb, 8km north-east of the Sydney CBD. The news that the LMR proposals had been finalised was welcomed after more than a year of uncertainty, but the latest court outcomes throw doubt on the usefulness of the reforms. The LEC said that while it acknowledged the area surrounding the site as being “in a state of transition” as a result of the SEPP reforms and that the LMR provisions applied to the site, the proposal was still not acceptable.
Disputes over distance and definitions
Just 1.4km north, Metis Developments faced a similar challenge for a part-six, part-seven-storey building on 93-101A Awaba Street. The project proposed 29 units, but the council issued a deemed refusal for failing to meet the 400m walking distance rule to a designated Town Centre. The council measured the distance at 423m, while Metis calculated it at 383m.
The dispute hinged on the definition of “that may be safely walked by a pedestrian,” specifically regarding the use of public footpaths and pedestrian crossings. Metis argued the council’s approach—using only formal crossings—could stretch the distance to about 800 meters. LEC Commissioner Nicola Targett ruled the distance was too great, falling outside the allotted Inner Area, and dismissed the appeal. The developer was ordered to pay the council’s costs of $15,000.
Under the new framework, the precise interpretation of these definitions determines whether development can proceed. The narrow difference between 383m and 423m illustrates how specific wording in planning rules can significantly alter outcomes, even within a short distance. The provisions therefore did not apply, and the development also did not comply with the Outer Area LMR standards.
Industry reaction to the outcomes
The Urban Development Institute of Australia (UDIA) has responded to the cases involving the 400m walk rule. UDIA NSW chief executive Stuart Ayres called for the NSW Government to clarify rules that allow such ambiguity to become a roadblock to development.
“While no measurement approach is perfect, it seems unfathomable in the middle of a housing crisis, that we could let a 23-metre walk kill off the construction of 29 new homes,” Ayres said. This response highlights the broader tension between local character preservation and the need for increased housing supply in established areas.