With a metropolitan population which is expected to expand from just over 4.6 million in 2012 to around 8.5 million by 2061 and the best employment opportunities increasingly being concentrated toward the city centre, it is not surprising that growing ‘up’ through greater density rather than expanding outward is increasingly being viewed as a critical part of the solution to Sydney’s long-term planning challenges.

Nor is it surprising that planners are looking at ways to accommodate more of the population within a smaller space through greater density. A 45-year plan for the city’s centre released in July talks about having a skyline full of towers of greater than 300 metres in height. Whilst this…