Modern bright single family house and office designed by TWS & Partners situated in West Jakarta, Indonesia. This project is a renovation project of an existing house on 6×15 meters (20×50 feet) land owned by a family of four. According to the background of expanding design and construction area, it was decided to design a house consisted of two buildings. It is a strategy to run the construction phases one by one and to separate the two functions between private living space and working space. The name of “Split House”, related to the concept visualizes two houses with slope roof that stand on two different land lots. One of them is rotated 180 degrees, so they are opposing each other. Living space entrance starts by a front courtyard with a tree as a welcoming vocal point and is covered by a transparent roof to let the natural light and air coming directly into it. After passing the courtyard, we will arrive in the gallery space like directing us to vertical circulation area at the back. Vertical circulation is made in zigzag shape, imagining it as an artwork element filling the void area at the back. The gallery space actually could also be used as additional space for working area of the office if it is needed.