The project MUDA aims to offer the municipality of Sant Boi a new residential building that is pragmatic, efficient, flexible and in harmony with the atmosphere of its surroundings. The building is spread over 7 floors, hosting 46 housing units divided into two single types of 2 or 3 rooms. The plant features an extremely optimized central core that houses the vertical distribution and two internal courtyards: spatial, environmental and energy devices. The homes are developed in an orderly and simple way, where the geometric and modular spaces of the bedrooms and bathrooms are contrasted with the fluid daytime spaces: kitchen, living room and dining room, forming part of a single harmonious environment. As a result, flexible use homes are offered where the space is adapted to the different needs and life stages of the user.