The office building sits on a hillside in a way people can percieve the façade of the building. This office primarily design as a sales office of the high-rised residential complex which is located next to it. Later on, building is going to be the head office of the construction company.The building has 2182 m2 closed area, consist of 3 floors which are two basement floor and one ground floor. Ground floor is arranged for sales /administration units and exhibition space. Representative flats are placed on 1st basement floor, technical units and parking are placed on 2nd basement floor.The reason why, building will be the first impression of the high-rised residential units, it has to have a spectacular architectural language.Building is designed as a prismatic mass which is ranging to a gap by the help of the cantilevers that lyed on the south and west facades. South facade is placed in front of a glass surface as a seconday faÁade. Geometric wooden panels strengthen the perception of the building from the main road and the solid-void relationship brings a comfortable office ambiance by the control of sunlight and sound. The space which is in between with wooden panels and glass façade, turns into terraces that provide natural air condition. North façade, which is a side facing to residential complex, is designed more transparent in order to see the construction site easiliy for visitors.By the sharp geometric combination of the materials; natural stone, glass and wood, are creating the general character of the building and this characteristic features are reflected on landscape design.