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Finalist World Award - Category Earth

Submitted by: ingenhoven architects + Architectus
Country: Australia

1Bligh, Sydney – Skyscraper of the future

The motivation and challenge of this project was to reach the next step in sustainable design and green building design. As the population grows, so must the height of the buildings, so it should be a main area of focus at this time to improve the construction and design of skyscrapers on an environmental and aesthetic level. This project set out to do just that.
The 139-metre tall '1Bligh' office building in Sydney was inaugurated in autumn 2011. Due to its compact geometry and a slight rotation of the building in relation to its site, all offices enjoy unobstructed views of the city's harbor. The structure of 1Bligh was erected with recycled material from the demolished buildings which were substituted by the new project. Recycled material was used for 60% of the concrete and 90% of the steel structure. 1Bligh is executed with a double skin façade. The façade provides operable sun shading blinds within the wind and weather protected façade cavity - effectively functioning like an external sun shade since the thermal insulation of the façade is the inner glass layer. The drastically reduced heat gain results in a 15% reduced energy demand for cooling. The area where you would usually find the ground floor was not built-up to provide space to the public. The building itself begins on the 1st floor, which was made possible by a special column design. The high-rise will be a significant addition to Sydney's skyline. In addition to its spatial efficiency the building boasts an ecological concept that is not only unique for Sydney but also for the entire Australian continent. Furthermore, the building has received the highest six star certificate of the Australian Green Star environmental rating system. Achieving the 6-Star Green Star rating in design and construction required a great deal of collaboration, and an integrated design approach that allowed all of the buildings services to work together, connected by a sophisticated BMS system and dedicated commissioning, tuning and monitoring practices. The major challenges involved in this project were to design a building that fits into the urban grid to ensure equal use and orientation for all users of the building as well as to achieve a high level of amenity and excellent energy efficiency in a fully glazed tower.
Christoph Ingenhoven studied architecture at RWTH Aachen and Kunstakademie Duesseldorf. He is the founder of Ingenhoven architects. Currently his main projects are the Main Station Stuttgart, Marina One Singapore, Google California and Tokyo Toranomon Hills. Christoph Ingenhoven is a member of numerous architectural organizations and juries. He is an appointed member of the NRW Academy of Science and Art and also cofounder of DGNB, Green Building Council. Christoph believes that skyscrapers globally ensure the survival of human beings on the earth. In the year 2050, five billion people will be living in the megacities of the world. A life without high urban density i.e. high-rise buildings is unthinkable and would be ecological negligence.


  • Project: 1Bligh, Sydney – Skyscraper of the future
    Applicant: ingenhoven architects + Architectus
    Country: Australia

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    Country: Denmark

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