Arch home is a merger of two smaller units, resulting in a 500- meter unit. The merger of the units made the building not have the necessary efficiency as a large unit. As a result, our goal was formed during the reconstruction of the building: changing the plan to reach an efficient space where the spatial quality is observed at its highest level. The plan changes were accompanied by the creation of new uses and the redefinition of past uses. Designing a private living room, breakfast in the kitchen, changing the kitchen openings, redefining the light windows and balconies, are among the changes that define the Arch home as a coherent 500-meter unit and not a house that is an incoherent amalgamation of two independent units. Finally, the changes are applied and seeing the final result of the project, our approach shows itself as follows: a completely modern definition of a completely classic building. The previous design of the Arch home was fully indicative of its style. A space full of decorations and elements that seen only in classic style. The classic arches of the previous building played the most key role in the design concept. Because those arches had the potential to link the classic style with the modern style; By creating intersections that are so modern that can also convey the grandeur of being in a classic space. Color was the final point on the formation of concept. we chose a color that is classic enough and can give the building a modern look and finish at the same time.