It contains a vegetable garden for family meals, while insulating the one-storey family room-kitchen below. Both the courtyard and the green roof spaces support the local conservation authority's interest to have the rear of the property re-naturalised as part of a larger ravine stewardship program. With much of the rear planted, these green spaces provide additional amenity space and more complex and modulated volumes. The ravine is brought to the foreground at the second floor spaces.