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Einladungswettbewerb | 11/2010

Sanierung eines Bürogebäudes in Neuilly-sur-Seine

1. Preis

KCAP

Architektur

Ateliers 115

Architektur

Erläuterungstext

KCAP Architects&Planners in cooperation with local partner architects Ateliers 115 win the international competition for the renovation and extension of an office building in Neuilly-sur-Seine, France. The team was announced winner out of a group of five international participants. The existing office building is a design by Swiss architect Roland Rohn for Laboratoires Roche in 1969-71. It enjoys an extraordinary position on the head of the Seine’s “Ile de la Jatte”, the site of Laboratoires Roche, in a green setting facing the main entrance of a large sports area and surrounded by water on two sides.
The French branch of the Swiss based Züblin Immobilien Group develops the renovation and extension of the building succeeding the planned departure of Laboratoires Roche in the fall of 2011. The client’s brief asked for the renovation of the 17.000 m2 existing office building and eventually its extension. The new building is requested to fulfill current sustainability and efficiency standards for facades, installations and spatial flexibility.

The design concept introduces lateral extensions to each of the existing wings. This creates a volumetric play in which each of the four volumes faces a different direction. The delicately differentiated volumes are grouped around a central core and include a plinth into the new structure. Due to the requested flexibility for future usage the internal organisation structure allows for classical office layouts and open working landscapes and offers to house one or more tenants.

All interventions are done with great respect for the building’s qualities - its transparency, façade design and the finishing of the interiors. 'The details of the curtain walls, the woodwork of the floors in the corridors, the natural stone at ground floor - all these elements generate a certain charm and luxury, without lapsing into ostentation or exuberance. We aim for maximum reuse of those and will keep the atmosphere which emanates from this fine and purely designed building from the 70’s’, says Ute Schneider, architect and director of the KCAP’s Zurich office.

The composition of the volumes allows to reflect the green surroundings in the concept in various ways: in green patios and voids in the inside and green roofs outside. The ground floor’s transparency reveals hardly any separation between inside and outside and integrates the green outside space into the building.

The new facades introduce a playful composition with horizontal and vertical orientation. The existing structure is equipped with a double glazed vertical façade, the extension with an aluminum façade exposing horizontal glass windows. This play creates great dynamics to the building and allows this varied mass to appear as one representative volume with one identity for the future user. ‘Our design will improve Roland Rohn’s building and turn it into a representative and well performing contemporary office development’, says Kees Christiaanse, founder and partner of KCAP.

KCAP and Atelier 115 will elaborate the winning competition design to apply for building commission in 2011 and start construction after the departure of Roche. The building is estimated to be delivered by the end of 2013.