This private residence, an original modernist house designed in 1960s by one of Canada’s most significant post-war architects, is set into the edge of a tree-lined ravine in an exclusive Toronto neighbourhood. a–A reimagined the residence’s interior architecture, arranging overlapping planar volumes to allow light to flood into the core of the house. A restrained palette of materials and simple, industrial detailing creates a counterpoint with the organic forms, colours and textures of the ravine setting—the classic minimalism of the former framing the cyclical changes of the latter.