Nestled within an established neighbourhood in Toronto’s west end just north of the shores of Lake Ontario, 81_27 is a project for a young, growing family which integrates a modern addition with an existing century home and its detached garage. Deriving its form from the scale of the existing buildings, program requirements, site orientation and micro-climate, the strategic positioning of the addition creates a mini-campus of new and re-defined architectural elements, transforming the original site plan into a cohesive, site specific courtyard residence which engages its site both spatially and environmentally.