The redevelopment project of Building C4 at the Missaglia Business Park in Milan transforms a disused structure into a multifunctional and sustainable residential complex. Located at the southeast edge of the Business Park, near Parco Sud and the Gratosoglio district, the project reimagines the existing 9,040 m² building using innovative architectural and environmental strategies. The façade will be revitalized through a common compositional module, interpreted with a variety of materials. This solution generates visual diversity that reflects the heterogeneity of urban neighborhoods. The alternation of materials in the cladding not only ensures a recognizable architectural identity but also harmonizes the building with its surrounding context, adhering to sustainability and urban regeneration criteria outlined in the plan. The design approach, which integrates eco-friendly materials and prefabricated techniques, reflects the intention to create a modern and inclusive environment in dialogue with both the city and the adjacent park.