In the lush setting of the La Vallée eco-district, a symphony of sustainability awakens, carried by a heating plant that infuses renewable energy to its residents. The buildings, akin to works of art, blend seamlessly with their surroundings, intertwining simple forms and green hues. Like a discreet muse, the chimney modestly rises to five meters, honoring the height of the surrounding skies. The concrete façades, designed for both the heating plant and residences, play with a subtle interplay of two layers, integrating both a concrete structure and internal thermal insulation. The green color, achieved with a stain, utilizes 30% recycled concrete, thus offering two variations to enhance the modulation and depth of the façade, adding a distinctive architectural dimension to the project.