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Refurbishment Z2

A powerful statement in favour of greater sustainability: the striking six-storey office building with its distinctive curved facade bands on the ZÜBLIN Campus in Stuttgart has undergone a comprehensive energy-efficiency and sustainability refurbishment over the course of 18 months. With the refurbished Z2, Zentrale Technik now offers a central workspace designed to foster collaboration – both within ZT and beyond.
  • Refurbished by Central Technology: The ZÜBLIN Z2.0 with DGNB Platinum certification. © ZÜBLIN - Niels Schubert
    Refurbished by Central Technology: The ZÜBLIN Z2.0 with DGNB Platinum certification. © ZÜBLIN - Niels Schubert
  • The new open-space office: desks in an open and occasionally closed environment. Sound-absorbing elements hang from the ceiling and office plants improve the indoor climate. © ZÜBLIN - Achim Birnbaum
    The new open-space office: desks in an open and occasionally closed environment. Sound-absorbing elements hang from the ceiling and office plants improve the indoor climate. © ZÜBLIN - Achim Birnbaum
  • The lively lounge zone of the new Z2.0: with lots of colorful and curved seating options. © ZÜBLIN - Achim Birnbaum
    The lively lounge zone of the new Z2.0: with lots of colorful and curved seating options. © ZÜBLIN - Achim Birnbaum
Client
Ed. Züblin AG
Contractor
General Design Contractor - Zentrale Technik Stuttgart
Location
Stuttgart
Project duration
October 2022 - March 2025
Type of building
Office building
Construction method
Solid construction with flat ceilings and offset reinforced concrete circular columns
Close-up of the facade of Z2.0 on the ZÜBLIN campus in Stuttgart. © ZÜBLIN - Achim Birnbaum

Sustainable Construction: Where the Future Takes Shape

A comprehensive refurbishment project and a completely new spatial concept have resulted in an office building that embodies the future of the workplace. Striking, curved facade bands and a distinctive building form give the Z2 a powerful, modern appearance. Particularly impressive is the novel green mesh that clings to the facade like an organic sculpture – an innovative, green eye-catcher that underlines the architectural sophistication. 

The staircase created with concrete 3D printing in the Z2.0 lounge. © ZÜBLIN - Achim Birnbaum

The focus was on future-proofing and sustainability: the Z2 has achieved the highest certification level DGNB Platinum, as well as the Sustainable Building Quality Seal (QNG Premium). In addition, a climate protection roadmap has been developed up to 2045 to ensure long-term climate neutrality. Through the consistent reuse of existing building components, flexible spatial structures and forward-looking design based on circular principles, a building has been created here that meets not only today’s but also tomorrow’s requirements – a true flagship project of modern architecture.

Nachher-Zustand Vorher-Zustand © ZÜBLIN - Jens Willebrand © ZÜBLIN
  • A portrait of Markus Landgraf during the opening of Z2.0.

    With the Z2, we are sending a clear signal about our commitment to the environment and society. The building has not merely been modernised, but fundamentally transformed – into a flagship example of sustainable and circular construction.

    Dipl.-Ing. Markus Landgraf
    Member of the Executive Board, Ed. Züblin AG

Innovation from within

There is a lot of rubble on the first floor. Over 50 percent of this was reused in the new concrete - a prime example of sustainable construction. © ZÜBLIN - Achim Birnbaum

Holistic visions for the ZÜBLIN Campus Stuttgart

Zentrale Technik planned the Z2 not merely as a construction project, but as a benchmark and model for the future of its own campus. As both client and occupier, it was crucial that ZT contributed its expertise from the very beginning – from the initial workshops right through to the final handover. Its task: to integrate as much of the the existing structure as possible whilst, through modernisation, creating a state-of-the-art, flexible and sustainable working environment.

The graphic from Generative Design shows the basic model and the energy analysis of the Z2.0.

Integrated and digital design expertise

Zentrale Technik impressed with its early-stage, three-dimensional, digital building modelling. This intelligent networking of all stakeholders throughout the entire project lifecycle ensured maximum transparency, efficiency and flexibility. Every component and every technical solution was conceived as a part of a greater whole – a prime example of modern, integrated design and construction. This process was supported by Generative Design ENERGY. It enabled the building to be analysed for energy efficiency, potential for CO₂ savings to be identified, and the design of technical systems to be accelerated by over 50 per cent.

The graphic from Generative Design shows the energy potential of the photovoltaic-equipped façade along the new Z2.0.

DGNB-certified: Sustainability through innovation

Zentrale Technik contributed technical expertise and a clear environmental vision. The focus was on sustainable construction through the reuse of existing elements, modular prefabrication and pilot projects such as reversible drywall or the concrete print in the foyer. Generative design was used to determine the potential for air volumes, heat recovery and photovoltaic yield. This resulted in an innovative photovoltaic fence that intelligently combines safety barriers with energy generation.

Services

Z2 - Gallery

  • The staircase of the renovated Z2.0 can be seen. © ZÜBLIN - Achim Birnbaum
    The staircase of the renovated Z2.0 can be seen. © ZÜBLIN - Achim Birnbaum
  • The Z2.0 office corridor with office plants and seating for discussions. © ZÜBLIN - Achim Birnbaum
    The Z2.0 office corridor with office plants and seating for discussions. © ZÜBLIN - Achim Birnbaum
  • The Z2.0 from the outside from the front. © ZÜBLIN - Achim Birnbaum
    The Z2.0 from the outside from the front. © ZÜBLIN - Achim Birnbaum
  • A TV with a games console, beanbags and board games in Z2.0. © ZÜBLIN - Achim Birnbaum
    A TV with a games console, beanbags and board games in Z2.0. © ZÜBLIN - Achim Birnbaum
  • Only the core substance of the floor and the staircase can still be seen on the construction site. © ZÜBLIN - Achim Birnbaum
    Only the core substance of the floor and the staircase can still be seen on the construction site. © ZÜBLIN - Achim Birnbaum