Located in the northern area of Milan, the project recovers part of an office complex dating back to the 1960s. The intervention involves the total rethinking of the facade and the internal distribution, thanks to minimal demolition, returns a flexible and renovated building. The existing envelope is totally replaced. In addition, a new fourth floor was built, set back from the facade, which becomes a new office space with a green terrace around the entire perimeter. On the top floor there is a roof garden and on the first floor a green terrace; the offices can be occupied both in single and multi-tenant. To increase the lightness of the facade, on the ground floor, carbon fiber was used for both structures and laminates, in order to create a base that enhances the geometries of the new envelope. The project is registered in the LEED building sustainability certification protocol, Core and Shell class.