The Tower of Cedars by Stefano Boeri Architetti

In 2015, Stefano Boeri Architetti won an important international architectural competition for a tower mainly for residential use to be built in the town of Chavannes-Près-Renens near Lausanne (Switzerland). This is how La Torre dei Cedri or the Tower of Cedars came to be but it is more than just a simple tower or a “house” extended vertically.

The project, which is currently under development, is rather a genuine prototype of a new model of housing, capable of providing a harmonious coexistence between a high level of comfort within the apartments and a direct and privileged relationship between the inhabitants themselves and the natural and vegetal world that houses them.

Image © Stefano Boeri Architetti

In particular, the principal character residing in this space (as much as if not more so than humans) is the cedar tree. Characterized by an iconic shape and a high resistance to climatic variations, it is found here in a number of different varieties which establish and continue a dialogue and a continuity of habitat with those already populating the surrounding area.

These primary factors give a powerful definition to the project and are combined with a unique condition of exchange and empathy with the typical local lakeside landscape through giving an open view from the tower over Lake Leman. In the same way, but from a different observation point, the vertical and unmistakable presence of the building stands out as a new, strong territorial landmark: an urban point of reference visible from all over the north of Lausanne.

Image © Stefano Boeri Architetti

This presence confirms and reinforces the extraordinary balance between nature and the city, Lake Leman, the forest and the fields – all those basic elements that make up the rich DNA of the “Chavannois” landscape. In this way La Torre dei Cedri should be considered not only as a particular example of decisive design innovation but also as an important element on a broader scale and on a conceptual, cultural and symbolic level.

In these terms, the project can be interpreted as a “living symbol” of a new relationship between the urban and the natural sphere and an essential example of biodiversity architecture. From a typological and construction point of view, the Lausanne tower is a 117-metre-high rectangular-shaped building with a floor plan of 52 x 15.5 meters and laid out along a north-south axis.

Image © Stefano Boeri Architetti

In addition to the 195 apartments of different sizes and types, the 36 floors of La Torre dei Cedri offer a large number of spaces for office use and communal services including a gym and a restaurant. The structure houses more than 80 large trees taken from three different types of cedars in addition to shrubs and other plants of various size and species to give a total planted area of about 3,000 square metres.

In order to create a sense of harmony with the floral organisms, the overall volume of the tower is characterized by the presence of a series of protruding elements including loggias of variable length in a staggered arrangement that, in addition to housing the trees as if they were in gigantic “pots”, enlivens the facades and breaks up the rigid vertical succession of floors.

Image © Stefano Boeri Architetti

With overhangs of over 3 metres, the projecting elements are mainly arranged on the south façade and, to a lesser extent, on the east and west facades. Observed from inside, the loggias extend the space of the apartments outwards, allowing the inhabitants to “project” themselves into the surrounding landscape: an immersive sensation amplified exponentially by the presence of the natural green interface.

In addition to the residential tower, the project developed by Stefano Boeri Architetti includes a commercial centre of 5,000 square metres serving the new complex, and the design of various public connecting spaces. In terms of distribution and architecture, a definite separation between the various functional areas is envisaged. Source by Stefano Boeri Architetti.

Image © Stefano Boeri ArchitettiImage © Stefano Boeri ArchitettiLocation: Chavannes-Prés-Renens, Lausanne, Switzerland

Architect: Stefano Boeri Architetti

Partner and project director: Marco Giorgio

Project leader: Marco Neri

Design Team: Giacomo Volpe, Jacopo Villa

Local architect: RDR Architectes SA

Agronomist, Botanist, landscape: Studio Laura Gatti

Structure: NFIC + INGENI

Installations: Weinmann-Energies SA, Lausanne

Electrical systems: MAB

Geological survey: Géolosanne

Firefighting: BG Protection incedie

Façade specialist: Emmer Pfenninger

Acoustic: D’Silence

BIM Manager: ABLE

Topographical surveys: Reso Vaud Sàrl, Prilly CH

Traffic study: Transitec SA Lausanne

Consultants: Studio Laura Gatti (Botanical expert)

Images: Courtesy of Stefano Boeri Architetti

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