Casa Bombai is a rationalist project where concrete plays a transcendental role: not only visually, but also as a way to execute sophisticated geometries that allow the house to be delimited and expanded in its surroundings. The cantilever partitions give rise to this dichotomy present throughout the entire façade. Access to the house is designed to start from the momento the user gets out of the car. As you walk up to the house, you are greeted by a water mirror on the left and, on the right, by an exposed concrete partition that hangs eight feet and a half, framing the entrance door. The entire program is developed on a single floor. Upon entering, the user finds a large social space where the living room, dining room and kitchen, fully integrated, expand to a gallery with a grill. The private area of the house has two bedrooms, their bathrooms and a third bedroom/study room which, if required, can be accessed from the street. The arrangement of its windows, large glazed surfaces, allow the entry of natural light during sunny hours and, in turn, allowing natural cross ventilation. "Plinth lighting", - slits flush with the floor - manage to spread sunlight in a natural and homogeneous way and constitutes the distinctive constructive detail of the house.