Helix - Post Headquarters

Located in Luxembourg’s vibrant Gare district, the POST Luxembourg Headquarters brings together 1,000 employees within 22,370 m² of work, meeting, and public spaces. The project unites the restored heritage-listed Accinauto building with a new stone-clad structure, creating a strong yet balanced urban presence. Vertical stone fins lend rhythm and depth to the façade, while the central atrium and its spiral staircase foster communication and openness. Built with local materials and conceived to last, the building connects past and future, integrating naturally into the fabric of its dense urban context.

The project faced a complex brief: to create a 22,370 m² headquarters for 1,000 employees within Luxembourg’s dense Gare district, balancing heritage, a highly active urban context, and ambitious sustainability goals. Rather than pursuing a vertical landmark, the strategy focused on dialogue - between past and present, openness and restraint, city and workplace. By preserving and extending the heritage-listed Accinauto building, the design maintained continuity with its surroundings while minimizing demolition and carbon impact. Sustainable strategies, including reuse of existing structures, active tiles, heat recovery from the adjacent data center, rainwater recycling, and PV panels, enhanced environmental performance. Inside, a central atrium with a spiral staircase structures the workspace and fosters openness, communication, and well-being. The result is a civic, sustainable building that mediates between vibrant surroundings and an interior defined by clarity, light, and calm.

The building is constructed with a reinforced concrete structure, while the façades combine wood-aluminium frames and vertical natural stone fins that provide rhythm, shading, and permanence. Interior finishes alternate between natural stone, oak, and steel, creating a balanced and tactile atmosphere. From the outset, sustainability guided every decision: the reuse of existing foundations and structures saved over 8,600 m³ of concrete and nearly 2,600 t of CO₂, while local material sourcing reduced transport and emissions. Durable natural materials and modular façade systems ensure long-term resilience and low maintenance. Achieving a DGNB Platinum certification, the building was recognized for its exemplary performance across ecological, economic, socio-cultural, and technical criteria. As the first project outside Germany, it also received the DGNB Diamond distinction for outstanding design and architectural quality.