A Mona Vale housing audit request has brought renewed attention to wastewater capacity, transport services and emergency evacuation routes, with residents seeking an independent assessment before further higher-density development proceeds.
More than 100 people attended a rally outside NSW Parliament House in Sydney on Wednesday, 21 October 2026, organised by Save Our Suburb (SOS) Mona Vale. The group presented a technical dossier examining infrastructure constraints across the Pittwater Peninsula.
Parliamentary Secretary for Planning and Public Spaces Stephen Bali received the document and met with a delegation from the group. The request was subsequently raised in Parliament on 22 October, seeking a temporary pause on specified higher-density planning pathways until an independent infrastructure and emergency evacuation audit is undertaken. The parliamentary statement referred to more than 110 rally participants and over 2,500 local signatories. Both figures were reported by Ms Jacqui Scruby.
Mona Vale Housing Audit Focuses On Infrastructure
The dossier identifies wastewater treatment, road capacity and public transport as areas requiring further assessment before additional housing is accommodated. SOS Mona Vale has raised concerns about the Warriewood Wastewater Treatment Plant, particularly its ability to manage increased demand during heavy rainfall. The group also questions whether existing transport connections could accommodate higher population density.
Emergency access is another concern, given the Pittwater Peninsula’s limited road connections and its exposure to bushfire hazards. Sydney Water has disputed claims that the Warriewood treatment facility lacks sufficient capacity. Its reported position is that a 2023 assessment found no existing treatment-capacity constraints and sufficient capacity for future growth. An updated assessment was expected during the current financial year, although its completion has not been confirmed.
Planning Assessments And Housing Controls
The NSW Department of Planning has maintained that infrastructure capacity was considered when Mona Vale was selected as a designated centre under the Low and Mid-Rise Housing Policy. The assessment process considered public transport accessibility, environmental constraints and infrastructure, including roads, water and sewerage.
However, detailed forecasts of potential development uptake were not prepared for individual centres, including Mona Vale. The distinction between broader infrastructure assessments and location-specific development forecasts remains central to the residents’ concerns.
NBC has separately examined traffic, parking and projected housing growth through its Mona Vale Place Plan investigations. Its May 2026 update outlined work examining possible effects on the local road network and town centre.
Under the existing housing policy, eligible residential land within designated walking distances of Mona Vale town centre may accommodate additional housing types and building heights. The controls remain subject to zoning and exclusions for certain environmental and bushfire-related constraints. The request for an independent audit has been formally raised, but no decision granting a temporary planning suspension or commissioning the proposed audit was established during the research check.
Published 23-October-2026
