Developer giant Mirvac has unveiled its plans for a set of luxury apartments atop the Harbourside redevelopment at Sydney’s Darling Harbour, including three double-storey penthouses and three single-level sub-penthouses.

The six ultra-luxe apartments will be the jewels in the crown of the 48-storey, 263-apartment tower – and are set to be the next prestige properties caught up in Sydney’s high-altitude price wars.