Competition Success 505 George Street, Sydney, Australia...stainless-steel cladding, recycled timber...

Press Release 505 George Street 20.07.2018 1 / 13

The architectural firms ingenhoven architects and architectus have won the international competition for a mixed-use tower at 505-523 George Street in Sydney with a height of 270 meters. The announcement was made by the clients, Mirvac and Coombes Property Group.

The winning entry is a 79-storey signature tower, which, as the highest residential building in Syd-ney, will be a profoundly visible landmark standing for an economical, environmental and socially sus-tainable, future-oriented development. The project is characterized by the connection of a slender, elegant design with the plausible interplay of mixed uses such as high-quality living, retail, a hotel, as well as leisure and childcare facilities. The building will thus greatly invigorate public life in the sur-rounding area.

ingenhoven architects’ and architectus’ design was chosen ahead of five internationally acclaimed architectural firms including Skidmore, Owings and Merrill partnered with Crone, Wilkinson Eyre, Foster + Partners, fjmt and Bates Smart.

For further information don’t hesitate to contact:Michael KuhnHead of CommunicationsSenior DirectorPhone +49 (211) 30101 120 Fax +49 (211) 30101 42 120 Mobile +49 (173) 588 88 23 michael.kuhn@ingenhovenarchitects.comwww.ingenhovenarchitects.com

Sydney’s tallest residential tower to be designed by ingenhoven architects in cooperation with architectus

Sydney‘s soon-to-be tallest residential tower with a height of 270 meters © ingenhoven architects / Doug and Wolf

Competition Success505 George Street, Sydney, Australia


The winners have collaborated successfully once before, creating 1 Bligh, a 28-storey tower with a height of 139 meters and Australia’s first truly “green” high-rise. It was awarded with the Interna-tional Highrise Award in 2012.

“Now we have combined our expertise once again by designing a tower which will be highly integrat-ed in the existing surroundings and offer a great public domain. This urban approach is based on the philosophy of a well-connected public and con-ceives of the tower as being a ‘friendly neighbour’. The combination of different uses and the timeless design of the building are integral parts of an envi-ronmentally sustainable approach but also expres-sion of a deep understanding of the project goals”, said Christoph Ingenhoven, owner and founder of ingenhoven architects.

Ray Brown, Managing Director at architectus, add-ed: “We are looking forward to working with the team at ingenhoven again on another significant Sydney project. Our collaboration on 1 Bligh Street was very successful and we aim to emulate the same quality and success with 505 George Street.”

The very prominent location of the building in Syd-ney’s Central Business District led to a simple yet elegant façade design, which laid great emphasis on the undisturbed view to the outside. It will be a single skin façade with external sun shading de-vices and balconies, which have been designed as naturally ventilated spaces with a glass windshield, effectively functioning as winter gardens.

In keeping with ingenhoven architects’ super-green® sustainability aspirations, special attention was paid to energy use and environmental im-pact. For example, to achieve maximal daylighting effects, angled façade elements will be used as hybrid solar collectors on the north façade. Both electricity and domestic hot water can be generat-ed with one element while preventing the building from overheating. For the south façade, intelligent cooling systems will be applied.

The material palette is based on the idea of pure and non-composite materials, which are local to Sydney and typical for the regional architecture. Accordingly, choosing such materials does not only make sense in terms of the locality-based aes-thetics but also in terms of the drastically shorter and thus much less energy-consuming transport. All proposed façade and building materials have been chosen with respect to sustainability, dura-bility and authenticity in order to create a timeless and “healthy” building. Among these materials are sand-coloured fair-faced concrete, sand-coloured precast concrete elements, low-iron glazing and anodized aluminium for the façade, mirror-finished stainless-steel cladding, recycled timber for terrace decks and venetian blinds.

An particular structural system was developed for the building, consisting of a post-tensioned flat slab concrete floor structure with a perimeter col-umn grid and internal columns within party walls. The column grid will allow the development of efficient floor framing systems. The lateral system for the tower comprises a reinforced concrete core structure with outriggers and perimeter belt trusses at three discrete levels up the height of the building.

ingenhoven architects are one of the leading inter-national architectural firms with regard to sustain-able architecture. Ecologically and economically responsible handling of resources is at the core of their designs. This quality has been confirmed by the highest certifications according to interna-tional standards, including LEED (US), Green Star (Australia), BREEAM (GB), DGNB (Germany) and CASBEE (Japan).

The office have extensive experience with large-scale international projects such as the Toranomon Hills Project in Tokyo and the Breezé Tower in Osa-ka (2005–2008). The largest project by ingenhoven architects yet is Marina One in Singapore, compris-ing 400,000 square meters. The high-rise complex, in which 20,000 people will work and live, features two office and residential buildings that enclose a large public garden.


With its slender, elegant design, the skyscraper will be well integrated in the existing environment and offer a large public space

on the ground floor © ingenhoven architects / Doug and Wolf


The very prominent location of this building led to a façade design, which laid great emphasis on the undisturbed view to the outside

© ingenhoven architects / Doug and Wolf


Elegant street frontage: In front of the main entrance is a well-proportioned little plaza, which is protected by a glazed windscreen



Through site link: The design provides a passage with attractive and intelligent routing as a short cut through the building



The through site link between George- and Kentstreet has a glazed canopy – guaranteeing wind comfort and rain protection



The signature tower stands for an economical, environmental and socially sustainable, future-oriented development in the precinct

© ingenhoven architects

The elliptical floor plan realizes the project vision of the high-rise residential building as a „friendly neighbor“ within the neighborhood



Situated at the south end of the Central Business District, “505 George Street” marks the transition to the lower southern part of Sydney with retail,

residential and cultural uses © ingenhoven architects


All residential floors of the 79-storey building can be accessed via eight TWIN elevators, which run in four shafts



The distinctive „505 George Street“ project is an important addition to Sydney‘s skyline and has the potential to become its landmark



Project Data

Project: 505 George StreetLocation: Sydney, AustraliaCompetition: International competition 2018, 1st prizeClient: Mirvac and Coombes Property GroupArchitect: ingenhoven architects, Düsseldorf with architectus, SydneyTeam ingenhoven architects: Christoph Ingenhoven, Martin Reuter, Wenwen Zhang, Kenta Mabuchi, Risa Kagami, Peter Pistorius, Zakiah Supahat, Soichi Kadokawa, Philip H. Wilck, Anette BüsingStructural design: Enstruct, SydneyFacade design: DS-Plan, Stuttgart / Arup, SydneyLandscape design: Turf Design, SydneyGFA: 66.000 m²Height: 270 metersStoreys: 79 Sustainability certification: Green Star 6 Star / BASIX Australia / 5 Star NABERS (Hotel)Construction period: 2021–2024

www.ingenhovenarchitects.comwww.architectus.com.auwww.mirvac.com

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About ingenhoven architects

In 1985, Christoph Ingenhoven founded ingen-hoven architects, a practice that is one of the pioneers of sustainable architecture. The team consists of about 100 members of staff of different disciplines and aims to create architecture that responds to each respective location in a specific way and, at the same time, tries to find architec-tural answers to urgent questions of the present and near future. ingenhoven architects has won numerous competitions and awards. Using the term supergreen®, the practice pursues a com-prehensive sustainability concept. It develops and builds projects of any size and typology in almost all parts of the world—all in accordance with the highest green building standards, such as those of LEED, Green Star (Australia), BREEAM (GB), DGNB (Germany), and CASBEE (Japan).

Christoph Ingenhoven was born in 1960 and stud-ied architecture and art history at Aachen Technical University and, under Hans Hollein, at Düsseldorf Arts Academy. He is a founder member of the German Sustainable Building Council (DGNB) and the Federal Foundation for Building Culture. In addition, he is a member of the North Rhine-West-phalia Academy of Sciences and Arts.

The most important projects by ingenhoven architects include the Lufthansa HQ at Frankfurt Airport, the European Investment Bank in Luxem-bourg, the HQ of the Daniel Swarovski Corporation at Lake Zurich, the Lanserhof health resort at Lake Tegernsee, and the high-rise complex Marina One in Singapore. The high-rise RWE building in Essen was completed as early as 1997. It is one of the world’s first high-rise buildings with a double-skin facade for natural ventilation of the office spaces. In the same year, the design for Stuttgart’s main railway station was awarded 1st prize in an inter-national architecture competition. In 2006 Chris-toph Ingenhoven received the Global Holcim Gold award—one of the world’s most valuable architec-tural awards—for the project, which is scheduled for completion in 2021.

One of the practice’s core competences is the design and implementation of highrise buildings. In 2012, ingenhoven architects was awarded the International High-Rise Building prize for the 139 meter high building 1 Bligh Street in Sydney, which was also certified with the highest Austra-lian green building rating, “Green Star, six star”.

At the beginning of 2017, the foundation 123 stone for the Toranomon Hills project in Tokyo was laid, a 185-meter high office tower and a 220-meter high residential tower. The buildings are scheduled for completion in 2019 and, following the Breezé Tower in Osaka (2005–2008), are the practice’s second high-rise building project in Japan.

The hitherto largest project by ingenhoven ar-chitects is Marina One in Singapore—a 400,000 square meters high-rise project with two office towers and two residential towers that enclose a large public garden. The development will provide accommodation and workplaces for 20,000 people. The project, which has been completed in 2017, is an outstanding and groundbreaking example of a building in a megacity.

The head office of ingenhoven architects is locat-ed in the Düsseldorf Media Harbor precinct. In addition, the firm is represented internationally at St. Moritz, Sydney, Singapore, and Santa Clara in California, USA.

Competition Success 505 George Street, Sydney, Australia...stainless-steel cladding, recycled timber...

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