The fourth and final phase of Lightspeed's headquarters at Gare Viger was entrusted to ACDF with a clear mission: to reinforce the commitment to unique interior designs and participatory business spaces.

The objective was to highlight beauty, life, and generosity through interior architecture that goes beyond simple color specifications. ACDF focused on fundamental principles such as the layout of functional spaces, the presence of natural light, a diversity of work environments, and the enhancement of everyday experiences. Faced with the evolution of workspaces, marked by the increasing demand for flexibility, privacy, and community building, this phase maintains the architectural approach introduced in 2015.

By integrating contemporary elements with original materials, ACDF created a palimpsest of the station's history. The magnification of structural arches on the second floor recalls the grandeur of train station Great Halls, softening the contrast between the past and the present. The "Flagship space" on the ground floor adopts noble materials to create a minimalist and welcoming environment. Joan Renaud, principal associate at ACDF, emphasizes that the approach aims to revive the lost energy of the old station while respecting a contemporary aesthetic aligned with Lightspeed's dynamic image. The completion of the headquarters marks eight years of expansion, with a versatile professional space ready to support the company's continued evolution.

ACDF has succeeded in designing a variety of spaces to ensure maximum flexibility and meet the present and future needs of Lightspeed.