The extension to a small inner city house began with the idea of maximizing the relationship to the garden. The desire to create a large family house on a small piece of land, generated the design of the ground floor as a series of open public rooms that could be either indoor or outdoor. Custom made sliding doors allow spaces to be joined or divided, be inside or outside giving the house a feeling it has a large garden. A large double height room in the centre of the plan is intentionally ambiguous. It contains things we associate with the ‘outside’ like a translucent batten roof and an opening framing the sky, contrasting with ‘internal’ fire place and pendant lights.Upstairs the parents and children’s bedrooms are separated by the double height space, while an access corridor runs around the double height outdoor room adding to the sense of theatre and activity.The house is surrounded by 5 neighbouring houses. The utility zone is located along the western edge, which acts as a solid core to maximize privacy. Openings are carefully located to maximize distant views and privacy.The extension is lined with traditional shiplap timber cladding, a contextual gesture to the existing housing in the area. However the traditional strategy of solid core and lightweight balcony is inverted. The battened roof to the double height space allows, northern light to fill the house, while from the outside, the house used recesses to form the deep shadowing desirable in a subtropical climate.The design strategy has a series of environmental benefits for the subtropical climate. The combination of open plan and overhangs allows cross ventilation in both rain and shine, while the double height space allow hot air to escape. All service spaces are designed along the western edge of the house, acting as a thermal barrier. In winter rooms can be closed into smaller compartments to retain heat. The existing house is recycled as a guest house and garage.