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Published: Monday, June 25, 2007

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The competition winning design for the WestendDuo in Frankfurt adopts a slender formal vocabulary that translates the building from an imposing office tower to a delightful urban landmark.

By: KSP Engel und Zimmermann Architects

Architecture-Page | WestendDuo by KSP Engel und Zimmermann Architects
View of the north and south towers in the WestendDuo office building.

Project Details

  • Project Name: WestendDuo
  • Client: Hochtief Projektentwicklung GmbH
  • Project Type: Architectural design
  • Principal Designer: KSP Engel und Zimmermann Architects
  • Design Team: Marco Colonnelli, Paola De Franceschi
  • Date of commencement of project: January 2005
  • Date of completion of project: December 2006
  • Location of site: Frankfurt on Main, Germany

Architecture-Page | WestendDuo by KSP Engel und Zimmermann Architects
View of the building amidst its urban context.

The Building

The design for a double high-rise office building in a prime location in Frankfurt devised for a competition in 2001 won by KSP Engel und Zimmermann Architects.

The WestendDuo is 96 meters high. The south tower stands parallel to Bockenheimer Landstrasse, while its northern counterpart stands perpendicular to the layout of the Westend.

The two slender towers incorporate the different street grids and are rotated toward each other concealing their true size from the facing residential areas.

In order to address issues of flexibility, the new edifice has been conceived for different possible tenants.

Folded concrete ceilings generate pillar-free space and minimize heights, allowing for the height to accommodate an additional storey.

The old Miquel-Villa and trees on the ground have been preserved.


  • Text: Courtesy of the architect
  • Photographs by Jean-Luc Valentin, Courtesy of the architect
  • Compiled and edited by Manish Mehta

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