Viettel has a new home in Hanoi and it has taken the opportunity to create a progressive, sensitive and sustainable working environment. The headquarters of Vietnam’s largest telecommunications provider is presented as a sloping disc-like building that gently rises from the ground.

More than an exploration in form, the Viettel building pushes forward ideals of open and collaborative working and environmental responsibility. The building was designed from the inside-out through a rigorous process that paid attention to the user experience. Open floor plates over eight floors are interconnected via a network of lifts, stairs and escalators that encourage chance meetings and spontaneous interactions among colleagues. 

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The open floor plates were also tuned to an ideal depth to allow natural daylight into all working areas. Overhead, skylights in the green roof draw natural light into shared spaces located in the ‘wings’ of the building. These all help to reduce the use of artificial lighting indoors. But where there is light, there is also glare and heat. Protecting the interior from the unwanted side-effects of harnessing natural light are horizontal louvres on the façade. Here, the tightly packed striations lend themselves well to the reading of the monolithic building. 

The headquarter’s distinctive green roof is an extension of the adjacent park and lake, and brings to life a multi-prong approach to environmental sustainability. Beyond lowering the cooling load and affecting the building’s micro-climate positively, the roof also features a rainwater harvesting system. In its soft landscape replacement strategy, Gensler approached the matter sensitively by incorporating native plants in the landscaping to create a more resilient eco-system. 

As a corporate home to its employees, the Viettel building makes a strong statement about its commitment to collaboration and employee well-being. As a building in the city, it is an example of sustainability and urban biodiversity done well. 

Photo by Owen Raggett

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