39 Hunter Street

  • Spectacular refurbishment of 90-year-old building.
  • First heritage-listed building in Australia to achieve 6 Star Green Star rating using the version 2 Office Design Tool.
  • Introduction of centralised atrium to enhance daylight penetration and create an internal focal point for the building.

A charming seven-level office building, constructed in 1916, is undergoing an impressive redevelopment and refurbishment, becoming the first heritage-listed building in Australia to achieve a 6 Star Green Star Office Design (version 2) rating. 

The unique building, located in the Sydney CBD, retains all the aesthetic advantages of its era, while correcting errors of the past. The existing fabric of the building was an integral part of the refurbishment design, which maximises the embodied energy of the building.

A daylight-filled atrium decreases the need for internal lighting and creates a sense of community for workers. Arup’s acoustics team devised methods of creating sound pathways through the atrium that would not disturb those working in the multi-tenant building. Flexible bi-fold glass panels allow acoustic privacy, while blinds will allow visual privacy and glare control. The atrium also serves as a return air plenum and smoke spill path for the commercial floors, minimising the need for building intervention in the form of additional risers.

The building's underfloor displacement system is a relatively new cooling technology that, together with carbon dioxide monitoring and control, improves air quality in a highly energy-efficient manner. Water tanks supply the building’s overhead sprinklers in case of fire and serve a dual function. They also act as a store of cold energy that will be used to lower peak time electricity load, so reducing demand on the grid.


  • 39 Hunter Street - external facade. Credit Matthew Jeffery.Open gallery

    An impressive redevelopment and refurbishment of a 90-year old office building.

  • 39 Hunter Street - architect's sketch of the building refurbishment. Credit Jackson Teece Architecture.

    The spectacular refurbishment of the 90-year-old building included a central atrium to enhance daylight and create an internal focal point.