From the Architects:
The concept for J House stems from its relationship with the surrounding context. The rockface which defines the site also defines the form and geometry of the house itself.
The house twists and turns with the land, almost as if they’re in a dance. At points, the house lets the rockface take over and retreats further back, thus allowing natural light to enter the home where it is needed. At other moments, the house takes the lead and juts out dramatically beyond the land, in order to frame views.
Inside, the palette of polished marbles contrasts with the roughness of the ever-present rockface.