Belpaire Building - part of ZIN in the North District

Please note: this interior tour can only be booked on Mondays and Tuesdays. It does not include a visit to The Standard or the rooftop; these can only be booked on Wednesdays, Thursdays, and Fridays via this link..

Zin in No(o)rd is the result of a major renovation of WTC I and WTC II, icons of Brussels' North Quarter. In the 1960s, under the leadership of Paul Vanden Boeynants, the Manhattan Plan was developed here. A modern office district was created with wide avenues that invited cars into the city center. The tall, impersonal towers literally towered above the social network and urban fabric and were to be connected by footbridges. The original plan was only partially implemented, and the new North District became a place that never really came to life.

Today, a new wind is blowing between the glass towers: from closed, dark buildings to more openness, mixed functions, and attention to quality of life. Zin in No(o)rd anchors this transformation in a single powerful architectural gesture and was rewarded for this by being named World's Best Tall Building in 2025. The project also earned a place on the longlist of the prestigious EUmies awards and on the shortlist of the Brussels Architecture Prize.

The Belpaire Building: sustainable conversion as a starting point

At the heart of the project is the Belpaire building, which houses some 20 Flemish government departments. The extensive renovation was designed and carried out by the architects at 51N4E in collaboration with l’AUC and Jaspers-Eyers Architects. The starting point was not a tabula rasa, but the existing structure and materials, which were preserved or given a new lease of life wherever possible. This choice is at the heart of the sustainable ambition: less demolition, less material consumption, and a strong focus on flexibility, energy efficiency, and adaptability over time. During the visit, you will gain insight into how an outdated office building was transformed into a contemporary working environment, with attention to light, openness, and the relationship with public space.