Loft House is a free­standing timber structure in the backyard of a family home in the coastal suburbs of Perth. The structure houses a series of semi­-outdoor and internal spaces, namely; an outdoor entertaining area, a music studio, sleeping loft and a garage and storage area. The design challenge of conflicting spatial uses and a tight budget is resolved with conventional triangular trusses used in a playful and inventive way to sculpt the series of functional spaces as one coherent form. The trusses are manipulated in three ways to create a twisted roof form that weaves from the existing house, through the tall eucalyptus trees and eventually slopes up towards the rear laneway. The design flips the triangular trusses upside down to define the outdoor entertaining space and provide structure for both the translucent roof cladding and battened ceiling lining. The trusses then fold to become wall structure for the studio's interiors and finally taper down towards the rear to include the garage. This tapering effect enhances the perspective of the form from the laneway and creates a sense of elongation from the garden’s entrance.