On Calle Sagasta in Chamberí, steps from Plaza de Alonso Martínez, this fourth-floor apartment occupies one of the neighbourhood's most distinguished classical buildings. The residence opens onto a south-facing balcony with views across the street, bringing consistent natural light throughout the day. The spatial sequence flows from the entrance through a generous living area and kitchen, conceived as a unified social core. High ceilings and the building's generous proportions amplify the sense of light and openness. Three bedrooms, each with its own dressing room and en-suite bathroom, occupy the private quarters. A guest toilet serves the public areas. The entire apartment is oriented externally, with the terrace functioning as a natural extension of the interior.