This project is a combination of commercial and residential purposes in a tube house located in Ho Chi Minh City, Vietnam. On the first floor, the owners can open their coffee shop, and the upper floors are for the living space. The tube house is a typical residential building structure with a narrow facade of 2.5m to 5.0m and length varies from 18.0m to 35.0m. Therefore, this project's main goals are to maximize space usage and enhance building performance.