Historic facade of 39 Hunter Street; Historic facade of 39 Hunter Street;
39 Hunter Street, Sydney , Sydney, New South Wales

Spectacular redevelopment and refurbishment of historic 90-year-old 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.

Project Summary


7storey historic office building

1916original construction

1stheritage-listed building to achieve 6 Star Green Star v2 Office Design