Since the dawn of humanity, architecutre’s primary mission has been the mastering of time, while managing the elements of nature.

in the immediate aftermath of the 1973 oil crisis the founders of ateliers 2/3/4/ began their architectural pursuits, a climate particularly conducive to instilling in them an awareness of the environmental stakes.

In 1979, they are awarded a prize from the french ministry of infrastructure for their contribution to the development of high-density individual experimental housing.

Beginning in 1985, during their first commissions, the founders focus on developing energy efficient projects (education inspectorate in chaumont, national education headquarters – equipped with passive heat recovery ventilation system) as well as utilizing alternative construction techniques (multipurpose community hall in molières – wood industry). These projects will receive various awards and come to be considered as models of quality architectural performance.

Since 2000, all of ateliers 2/3/4’s projects develop in accordance with the french High Quality environmental standards (HQE).


In 1992, the city of chaumont, in conjunction with the ministry of infrastructure, granted ateliers 2/3/4/ the opportunity to put into practice research on new types of intermediary housing, reconciling the qualities of individual and collective approaches. Entitled “the flat collective,” it is the first “eco-neighborhood” in france. (pooling of parking, over-insulation of the buildings, condensing boilers, rainwater collection tanks, a green corridor ensuring the preservation of biodiversity, natural ventilation of all apartments, natural lighting of all rooms, every housing unit constructed as a duplex with small to large exterior spaces.)


In 1997, the city of paris entrusts Ateliers 2/3/4/ with the realization of the capital’s first mixed-use builiding, combining an elementary school and a housing complex.


In 1999, the new law school in limoges provides the opportunity for completing a multipurpose building that combines a university building and a conference hall. After an energy audit to assess its thermal performance, this building, thanks to its compactness, proves to be even more efficient than foreseen in simulations prior to construction. for this building Ateliers 2/3/4/ receives the Amo Award, attesting to the quality of its partnership with consulting project management.


In 2010, Ateliers 2/3/4/, in cooperation with the city of Boulogne, initiates a new type of mixed-use and multipurpose building that this time combines a school, a gym, and a small public garden, a concentration of basic facilities that will transform this complex into a center of neighborhood life. The same year, ateliers 2/3/4/ receives the “sustainable housing” award for its completion of a residential complex in Guyancourt.