The project is set on a Country Club plot bordering the golf course, a condition that introduces a key regulatory constraint: a reduced maximum height that prevents the construction of a second level above natural ground level. Faced with an extensive program that could not be fully accommodated on a single floor, the proposal adopts an excavation strategy, organizing the house on two levels, with the second level developed below ground around a sunken central courtyard. This courtyard becomes the true “heart of the house.” On the ground floor, it articulates the entrance and structures all main circulation routes, organizing the relationship between the access, guest bathroom, garage, kitchen, living–dining area, and the descent to the lower level, while simultaneously providing privacy and protection to the social spaces. The lower level accommodates the playroom and the study, both naturally ventilated and lit through the courtyard, as well as the laundry room, which also benefits from an independent side access. This basement level also features a separate exterior entrance, offering flexibility of use and the possibility of autonomous functioning. The ground floor is conceived as a long linear bar that fully opens onto the golf course, establishing a direct and continuous relationship with the landscape. At one point, the volume is carved out to preserve an existing olive tree, integrating it into the project: the beam that defines the main façade crosses the tree, turning it into a central element of the spatial experience. The children’s bedrooms face the rear of the plot, connected to a more protected and secure garden, shielded from the open exposure of the golf course. Natural light is a central component of the project. Circular forms recur throughout the design, appearing in both the roof openings and the main façade, creating a counterpoint to the large glazed surfaces facing the golf course. These controlled voids allow light to penetrate deep into the house, illuminating even the lower level while providing air and visual continuity. In this way, the house transforms regulatory constraints into a design opportunity, integrating all its levels into a luminous, fluid spatial experience closely connected to everyday life.