Andres Carosio Architects have just finished the expansion of the attic floor and the complete reconstruction of Löwenstrasse 19 in Zurich. Andres Carosio Architects are specialized in projects for offices and banks. Each project demands a customized solution for the particular construction assignment. Exact spaces proportions, natural lights deliberately conducted into the interior, impactual use of artificial lights and a targeted systematic positioning of glass, these are the keynotes for this project’s style. An unused attic floor and a dark and narrow atrium turned after the renovation / remodeling into a new office and communications floor flooded with light. The area acquired at the top floor of the five levels building, enabled the feature of a reception and conference rooms for the entire law office. As a consequence, additional spaces for new offices were created on the other floors. This was the kick-off motivation for the law firm to maintain this site in the city. It is an example of excellence on how to bring off an old-established facility, modern and attractive offices through innovative architecture. It was necessary to give the attic a feeling of a spacious area to make it lose its primary characteristics. Instead of trying to hide the diagonal forms of the ceiling, they were used as the core theme for the project, along with the light colors. The triangular forms were applied on the walls, stairway and furniture, in a way that a fresh vibration irradiates from the stairway through the whole building.