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CompanyServicesReferences E.ON AG, head office, Düsseldorf

References >Business and administration >E.ON AG, head office, Düsseldorf/Germany
New building for the head office of E.ON AG


The new head office of E.ON AG, Duesseldorf, was designed by the architects from 'O. M. Ungers' and constructed by the working group 'Zueblin/Wolfferts', between 1999 and 2001.

The ambitious planning by the architect Ungers, the special construction components and the extensive technical equipment of the building, in connection with the deadlines demanded from E.ON, constituted a special challenge. Furthermore, utilisation changes during the execution, and schedule delays on the side of the general contractor, challenged E.ON's planned relocation date. Therefore, DIEDERICHS concentrated on the synchronisation of the due dates and the building owner'spersonal contribution.

DIEDERICHS rendered expert opinion during the project, to limit possible claims by the general contractor. After the object had been handed over in accordance with the deadline, DIEDERICHS was also commissioned for general organisation of the acquisition and long-term management of deficects. The defects were collected and monitored through the use of a database, specially developed for this purpose.

at a glance


E.ON AG Düsseldorf


Prof. Dr. Ing. E.h. O. M. Ungers



Gross surface area

approx. 36,000 m²

Gross volume

approx. 160,000 m³


approx. 92 Mio. € gross


2000 to 2002


Change Management
Co-ordination of the building owner’s personal contribution
Conflict management
Defect controlling
Dunning and arrears process
Expert certificate
Handling of business
Organisation management
Schedule controlling
Supplementary management
Variance analysis

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