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Ballauff GbR:
Old shell, new core – building refurbishment on Schadowstraße in Düsseldorf

Key facts at a glance:

  • Challenge: Completion of the full revitalization project. From gutting the building and renovating the structural shell to the complete replacement of the building systems. A particularly complex aspect: removal of the old ceiling and walls on the 4th floor and construction of a new 4th floor with a green roof.
  • Special features: Invisible from the outside: The historic facade remains unchanged. Inside, everything is new. Only on the ground floor, the modern façade - integrated into the historic structure - makes a statement. The new 4th floor, with its green roof, blends seamlessly into the existing surroundings.
  • Approach: Implementation of the complete transformation: Stripping the interior down to the load-bearing structure, extensive steel construction work, structural work on all floors, and the addition of an extra upper floor with a green roof. Complete renewal of the building’s mechanical and electrical systems. Renovation of an existing building with technical expertise and a delicate touch.
  • Design: HPP / Schwitzke Project
Ballauff GbR | Schadowstraße 15 Düsseldorf
Hoarding erected – façade work begins.
Ballauff GbR | Schadowstraße 15 Düsseldorf
Roof opening for refurbishment and fit-out works
Ballauff GbR | Schadowstraße 15 Düsseldorf
The historic staircase shines in new splendor.

The final tour. A look back. Schwitzke Project made it possible – once again. From the outside, the historic facade on Schadowstrasse in Düsseldorf continues to tell its story. Only on the ground floor do modern touches hint at change. Behind it? A radical transformation. A perfect renovation of an existing building. Gutted down to the load-bearing walls. Structural and steelwork carried out with precision. The old ceiling above the 4th floor? History. In its place is now a new 4th floor with a green roof.

All building services have been completely renewed. Modern office spaces were created on the 3rd and 4th floors: minimal drywall defines the spaces, while glass partitions let light dance through the rooms. Electrical, HVAC, and ventilation systems operate invisibly. Schwitzke Project, in its role as general contractor, carried out the complete building refurbishment: from planning through to final inspection and commissioning. A statement in favor of sustainable renovation of existing buildings and the preservation of Düsseldorf’s architectural heritage. Mission accomplished.

Schwitzke Project realizes refurbishment and fit-out projects of any complexity in existing buildings. The portfolio ranges from new office worlds to innovative stores, from restaurants to fitness centers, from shell construction to revitalization, from building services to painters, from Amsterdam to Vienna. As general contractor, Schwitzke Project accompanies the entire construction process up to the turnkey handover, if requested from as early as the planning stage. Above all, Schwitzke Project sees itself as a facilitator of the ambitious plans of its national and international clients. Over 70 employees and a network of well over 1,000 companies and suppliers enable Schwitzke Project to act quickly, flexibly and on schedule at all times. Quality-conscious and cost-conscious. Schwitzke Project is the ideal partner for refurbishment and fit-out projects in Germany and Central Europe and takes on the management of parallel processes as well as the development of individual solutions and one-offs. Design-wise, technically, and structurally.

Schwitzke Project is part of the Schwitzke Group. Together we develop customized, innovative solutions from a single source. From brand strategy, architecture and design to turnkey conversion and expansion, including the technical trades.

© 2026 Schwitzke Project GmbH