For more than fifteen years the so-called business building "Cimos" has been left unfinished on the main Zagreb western avenue at the entry into the town. The new owner has decided to finish the construction by extending the existing layout and building additional floors. The new design has taken into account the existing shape and layout and the requirements of our client. The volume of the building consists of two parts - the higher one is intended for business purposes and the lower one contains a shopping centre and a car park. The new design does not essentially change the initial function of the building. In terms of design, the most important parts are the front and the attractive entrance lobby. The new glass front encircles the building and "softens" the curve of the layout. In addition to their primary function, the vertical blinds along the full height of the building emphasize this "softening" effect. The vertical communication line with the flights of stairs and lifts begins in the lobby. The business premises have an "open space" flexible design and can be defined later, according to specific needs. By building new parts we have also extended the surface of the existing floors and the capacity of the car park at ground level.