The basement and ground floor of a Macquarie Park development at 23 Halifax Street were found to have “serious damage” and spalling in the concrete, due to “defective workmanship”, the NSW Building Commission said in a work rectification order made public this week.
The Lachlan’s Line precinct was completed in 2019, consisting of four buildings containing a total of 900 apartments, with a retail village on the ground floor.
Spalling refers to deterioration of concrete and threatens the building’s supportive structure.
The high-rise buildings above ground as well as the retail village on the ground floor, share the basement area.
It is not yet clear how many apartments or businesses or which parts of the development are at risk.
The order was released on Monday, calling on Greenland to “remediate the serious and/or potential serious defects” identified.
“This is a defect … that causes or is likely to cause the basement slab to fail, namely, to fracture and collapse, leading to the destruction of the building … or threat of collapse,” the order says.
The work was “carried out in a manner that could result in a serious defect” in the buildings, the document says.
Greenland has been given eight months to rectify the concerns. The company has been contacted for comment.