Rose Bay apartment project faces council objection over groundwater and excavation risks

Woollahra Council has opposed the Department of Planning, Housing and Infrastructure’s approval of an eight-storey, 49-apartment development at 23-31 Dover Road, Rose Bay, saying its two basement parking levels raise unresolved groundwater and excavation risks.

The project includes nine affordable housing apartments. Council also objected to the absence of cumulative groundwater modelling to assess the Dover Road proposal alongside other development activity in Rose Bay.

Councillors raised concerns about groundwater drawdown, excavation impacts and construction vibration limits, as well as the potential for construction-related damage and flooding. Council’s response challenges the State planning approval rather than approving or refusing the development itself.

The objection is part of wider concern about development pressure in Rose Bay. Council said more than 20 development applications or State Significant Development applications had already been lodged or approved under the Low and Mid-Rise Housing Policy, potentially delivering more than 500 dwellings across the suburb.

Those projects have prompted concerns about traffic capacity, groundwater, flooding, excavation and infrastructure. Council also cited the risk of building damage and called for broader traffic and hydrogeological assessment.

The Dover Road project is separate from a State Significant Development proposal at 11-31 Hamilton Street and 36-56 Dover Road. That proposal includes three buildings ranging from eight to 12 storeys, with 433 dwellings and 5% affordable housing, alongside rezoning.

Council also objected to the Hamilton Street and Dover Road proposal, citing cumulative traffic, flooding, groundwater, excavation and infrastructure concerns. The two planning matters place the combined effects of development in Rose Bay at the centre of Council’s objections.

For residents around Dover Road and elsewhere in Rose Bay, the objections keep attention on groundwater conditions, flooding, construction impacts and the capacity of local infrastructure as more housing proposals are considered.