The house is located in Jakarta, with 70 square meters in a densely populated neighborhood. Alley with a width of 1.5M can only be passed by a motorcycle. Two Houses were built for two families of 4 people (husband and wife and two children), and a person with a disability. The concept of the Twin Houses shows the relationship between "brothers and sisters" through similar shapes but different sizes. Two bedrooms with toilets in each, kitchen and dining room for 4 family members. Meanwhile, other houses have one bedroom with a toilet and a living room.