Nastran No.14 is a residential project located in the northern part of the city of Tehran, Iran. The project consists of two duplex units that is designed for a couple with older kids that wanted to move out, this design allows the family to stay close but at the same time gives privacy and independence. The façade takes shape from the mirroring of the two floor plans, therefore, there is shifting of back and forth in the façade. Our design focuses on interaction of the private sector (bedroom) and the living area within the unit as well as optimizing the light the units receive.