State of Western Australia’s objective

To open up a world of new convention and exhibition opportunities, as well as provide significant benefits for SME businesses offering associated tourism, exhibition and catering services.


The government-owned land is on a 35-year lease to the Multiplex Consortium, comprising Multiplex Construction and Accor Asia Pacific.

The project delivered 16,000sqm of exhibition space, including a 2,500 seat auditorium, six exhibition halls, an 11,000sqm, six-level office building, 138 serviced apartments and a 1,500 bay underground carpark.

Johnstaff’s role

Johnstaff, through its subsidiary PDC, was appointed as the Independent Certifier for the project by the State Government and the Multiplex Consortium. 

In this role we reviewed design documentation, monitored construction progress, certified the completion criteria were achieved, and issued determinations on disputed matters.

Addressing the issues

The agreement between the contracted parties was a highly complex Build, Own, Operate and Transfer (BOOT) arrangement. The project was also undertaken using an accelerated approach that saw documentation and construction being progressed concurrently.

The complexity of the arrangements and the fast-tracked approach meant that Johnstaff played a significant role, particularly during the construction period. One of our key roles was to adjudicate the wide range of disputed commercial issues that arose between the parties, in line with the development agreement.  

map of the project location


  • Disputed commercial issues successfully adjudicated.

  • The PCEC delivered 16,000sqm of exhibition

  • Open to the public in August 2004