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Altaïs Tower


Staff architect at Reichen et Robert & Associés
Collaboration at the Planning Application and Technical Design phases


The Altaïs Tower is the rehabilitation project of the double tower Rond Point 93 in Montreuil carried out by the Reichen et Robert & Associés agency.


Height: Tower 1 – 80 meters | Tower 2 – 60 meters

Ground Floor Area: 109 000 m2

Owner: QUARTUS Tertiaire et Logistique

Certifications: LEED, HQE, BREEAM

Standards: BBC, RT2012


The project consists of a major renovation of a 25-storey high-rise building designed by architect Claude Le Goas in the 1970s, based on an urban plan initiated by Alvaro Siza. The daring choice of the structural recovery of all the facade elements, the technical equipment and the architectural style of the facades (Reichen and Robert & Associés) make it possible to achieve the highest levels of energy and environmental performance, while offering optimal comfort for future users. This 27-storey building (addition of 2 additional levels), including the first 6, accessible to the public, will allow Montreuil town hall to bring together all of its services and settle in the lower levels.

The first tower, lower and anchored in the ground, will present a warmer treatment while the second tower, more slender, will be clearer and reflect the changing lights of the sky. The new volume created of 7 levels, which constitutes a new extension, will be identified by a third type of facade, based on a curtain wall principle.

© Serge Grazia for Reichen et Robert & Associés