Working to a very tight budget, this modest extension was designed to be as cost effective as possible, while still offering a high level of consideration for refinement of design. Essentially the design is a single volume box added to the rear of an existing brick veneer house, however effort was made to distinguish the old from the new and provide a spatially interesting, light filled room. Principles of passive solar design were incorporated to minimise heating and cooling loads, and low environmental impact materials were used throughout.