We were engaged to complete the design of ten sustainable dwellings on an irregular shaped 2,150m2 grouped housing site at Cambridge Waters Estate in Canning Vale. In addition to designing the dwellings, we also created and lodged a survey strata subdivision, with lot sizes ranging from 143m2 to 270m2. Key objectives of the design included creating an attractive streetscape, achieving north facing courtyards and designing the units with passive solar principles to reduce the need for heating and cooling. We had to deliver all of this at a price point that would be affordable to the target demographic. Type 1 dwellings are two storey terrace homes facing onto the public street to create an attractive presentation to the rest of the estate. Type 2 dwellings have ‘side’ courtyards facing north, and are constructed as semi-detached dwellings of two stories. Type 3 dwellings are small one-storey cottages, with generous north facing courtyards and raked ceiling over the living area, to cater to seniors, singles, and couples. All three building types are extremely thermally efficient, achieving 8.0 stars out of a possible 10 stars. Planned sustainability features include insulated cavity brick construction, shading devices, energy efficient lighting, solar hot water heaters, energy and water efficient appliances, and rain water tanks.