Site establishment included building removal, vegetation removal, earthwork, construction of hoardings, building a new road access  via Pennant Hills Road with traffic lights, constructing offices and amenities, establishing on-site parking, installing environmental controls including sediment fences and  installing an acoustic shed to minimise noise impact of work on nearby residents.

In September 2015 the project team started piling for the footings of the acoustic shed and shaft located on the south side of the compound (closest to the Hills M2 Motorway). Piling for the northern shaft began in October 2015 and was completed in February 2016. 
Piling work at the Southern Interchange in January 2016