The interiors of the Penteli house were designed to create an atmosphere of balance and austerity. Purity of form and material choice are central to achieving this vision. A key feature is the centrally located single staircase, which anchors the composition. Indoor plantings serve as the soft core of the home, adding warmth and life. Throughout the design, structural elements either blend seamlessly into the white perimeter shell or stand out as distinct architectural features with their own unique forms and materials.