The main idea in this project has been based on simplicity, standardization and readability of living space to increase users comfort. For designing this three-floor residential unit; despite the possibility of designing six residential units; the decision of designing three units (each floor one unit) was taken to improve the quality of living space and also create better usability and make spatial relationships more fluid and easier.

According to the criterion and mass located in site, public spaces has been designed in front; facing to the yard, and private spaces to use quite space without disturbing noises designed in the end of the building. To supply suitable daylight for private spaces, in the end of the building a large skylight was considered, while providing the light and ventilation of private spaces, also allowed the creation of terraces and small gardens for each space.

With the increase in residential space, considering large terrace in front of building was possible. And also, with the construction of a four-level building on the other side of the alley, two tertiary panels with wooden sprockets were used to preserve the privacy of the terraces by moving these panels and rotating the angles of interior space without spaces, different light and shadow plays occur on the terrace.