15 Castlereagh Street is an 18 storey office building has three basement levels, ground floor and mezzanine level with a 12 metre void, topped by 16 office floors. The Lobby has recently undergone an extensive lobby refurbishment, presenting a modern and contemporary standard. Brand new male and female shower facilities have been installed in the building. Bike racks and parking for 44 cars in the basement is also available.
The building is within minutes of Wynyard and Martin Place railway station.