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Marcus Kaller, Member of the Management Board of STRABAG AG; Dr. Thomas Birtel, CEO of STRABAG SE; Florian Molzbichler, MHM architects; Dr. Alexander Tesche, Member of the Management Board of Ed. Züblin AG
Marcus Kaller, Member of the Management Board of STRABAG AG; Dr. Thomas Birtel, CEO of STRABAG SE; Florian Molzbichler, MHM architects; Dr. Alexander Tesche, Member of the Management Board of Ed. Züblin AG

Press release -

STRABAG AG lays cornerstone for new company headquarters in Cologne

  • STRABAG project demonstrates the future of construction: use of BIM.5D® (Building Information Modelling)
  • “TEAMS WORK.” made easy: the STRABAG Group’s Cologne-based entities united under a single roof
  • Total investment: approx. € 45 million

Construction on the new STRABAG AG headquarters in Cologne-Deutz began at the beginning of the year. Today, Germany’s largest transportation infrastructure company reached an important milestone on the construction site. Some 70 project participants and invited guests took part in the symbolic laying of the cornerstone for the new STRABAG group headquarters with the working title of “SIEGI.241” – so named after the address Siegburger Str. 241. The total investment for the five-storey building including underground car park amounts to around € 45 million. Construction is scheduled to last about 20 months. Main construction contractor is Ed. Züblin AG, the STRABAG SE group company for building construction and civil engineering.

“STRABAG AG has had its head office in Cologne for about 70 years. We feel a close bond to the city, are committed to the location here in Deutz and with our new construction project look forward to demonstrating our group know-how in terms of Construction 4.0. Efficient design and construction using BIM.5D® and lean construction – that’s what we are doing here in partnership with our group entities,” said Marcus Kaller, member of the management board of STRABAG AG, at the cornerstone laying.

STRABAG motto “TEAMS WORK.” in action

The modern new construction with around 17,100 m² of gross floor space, scheduled to be ready for occupation in the autumn of 2018, will promote the even closer networking and cooperation of the different disciplines of the STRABAG Group under one roof. STRABAG currently maintains several different office buildings in Siegburger Straße as well as a location in Alfred Schütte Allee. Now the staff will be coming together at one location, in line with the company philosophy and motto “TEAMS WORK.”. The existing building from 1998 will be connected to the new construction, giving SIEGI.241 enough space for about 1,000 employees from different group entities such as ZÜBLIN, STRABAG Real Estate, SAT or BRVZ.

Already during the design and construction phase, SIEGI.241 is a real “TEAMS WORK.” project: “We are applying the full range of our services to the new construction – from digital design to earthworks and ground engineering to turnkey building construction to building services and facility management. This makes the project special for us. SIEGI.241 gives us a chance to optimise the ‘future of construction’ from the point of view of all construction project participants,” says management board member Kaller.

Construction 4.0: the future of construction

Digitalisation has plenty of potential for the construction industry. A central driver of the digital transformation is Building Information Modelling (BIM). BIM digitally networks all of the relevant data across a project’s entire lifecycle.

The STRABAG Group has further developed Building Information Modelling under the designation “BIM.5D®”. BIM.5D® complements the tried-and-proven 3D model with the factor of time (4D) and other process data, e.g. costs (5D). BIM.5D® has been successfully used at a number of different construction projects, most recently BLOX in Copenhagen, the ThyssenKrupp Test Tower in Rottweil and the Rastatt Tunnel. As an internal pilot project, SIEGI.241 can help develop BIM.5D® even further.

Andreas Iselborn, ZÜBLIN project manager for SIEGI.241, explains the advantages of BIM.5D® in practice: “The five-dimensional model shows us the changes to the construction project in real time. An actual/target comparison is constantly made between the construction schedule and the actual progress of construction. Deviations from the design are recognised immediately and displayed automatically in the virtual model. The information is immediately available to all participants.” The STRABAG management board also sees this as an important benefit for clients: “Thanks to BIM.5D®, all project participants will always be comprehensively informed, networked with the others and have the same information – across the entire building lifecycle. This facilitates a partnership-based working relationship that is at eye level and which creates cost, design and scheduling security at a level that has never been seen before.”

More information:
Blog about the construction progress and background information on SIEGI.241:

BIM.5D®: “STRABAG is building the future”:



The success story of Cologne-based STRABAG AG began in the year 1923. Today the company is part of Austrian-based STRABAG SE Group and market leader in the transportation infrastructures segment in Germany with an annual output volume of more than € 4 billion. The more than 11,500 employees show commitment every day to offering first-rate construction services far beyond the usual road construction works. While focusing on the digitalisation of its work processes, STRABAG AG’s units cover the entire value chain in the construction of infrastructure facilities: from digital design to construction material extraction and production to actual construction of the projects to maintenance and repair by the company’s own road maintenance services. More information is available at

Stuttgart-based Ed. Züblin AG has about 14,000 employees and, with an annual output of over € 3 billion, is one of Germany’s leading construction companies. Since it was founded in 1898, ZÜBLIN has been successfully realising challenging construction projects in Germany and abroad and is the number one in the German building construction and civil engineering segment. The company’s range of services comprises all construction-related tasks – from civil engineering, bridge building and tunnelling to complex turnkey construction to structural timber engineering and public-private partnerships. ZÜBLIN attaches great importance to partnership-based cooperation, and our ZÜBLIN teamconcept has proved its value as a successful partnering model for more than 15 years now. Current construction projects of the company, a subsidiary of globally operating STRABAG SE, include the new Axel Springer building in Berlin, Messehalle 12 in Frankfurt and the Albabstieg Tunnel along the new Wendlingen–Ulm railway line. More information is available at

Press contacts

Birgit Kümmel

Birgit Kümmel

Press contact Head of Corporate Communications Germany/Benelux/Northern Europe +49 221 824-2472
Sabine Appel

Sabine Appel

Press contact PR-Manager +49 221 824 2159

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