O4 House in Osijek occured in response to the duality of life, the intention of the man to be safe and secure in an intimate setting, but to correspond with its environment. The location of the plot is in the center of Osijek, at its western edge and it is determined not only by its position in relation to the most significant cultural contents or social realities of Osijek, but also by its position in relation to the greatest Osijek geographical indication, the Drava river. Design of the O4 Houseintends to take over opportunities of the peacfulness of life and connection with nature, which ensures introverted and self-sufficient rural life, but not at the expense of socially intense urban life. The house is therefore conceived as a system of space around live link comprising of two walnut trees, and although dislocated from the street, is a part of its life, since the facade does not present a visual barrier of the view. The facade is just an accent of the safety and possible beauty of life.