N-House is a minimalist house located in Tokyo, Japan, designed by Tsushima Design Studio. The brief of this project is a low-cost family house for the clients, a young couple expecting two children. We designed a small but flexible space for the couple, where they can make alteration when new members of the family join in the near future. The northern side of the house, which faces the street, is buffered with a planting area and the staircase, providing more privacy for the house.