The design of this small office building was generated by the owner’s requirement for a modern, sustainable building, the site and the context of the mixed residential/commercial neighborhood. The geometry of the building is a direct response to the trapezoidal shape of the lot, with the curved west wall being tangent to the west property line. The main entry was pulled out to the front in order to maximize each floor plate. The butterfly roof which hovers over the building is a response to the pitched roofs of the surrounding houses and is on an angle that leads from the front west corner of the lot to the rear east corner. The inverted pitch allows a unique and exciting experience of the interior while the angle organizes the floor plan. The roof shades clerestory windows which allow natural light to flood the interior from above while providing a natural ventilation source to vent hot air from the inside. The extensive west facing glass is shaded by overhangs, as well as the existing trees on the adjacent lot. The cellar office spaces also feature extensive natural light. Exterior materials include brick to reference both the residences and the adjacent commercial building, glass and aluminum panels. Sustainable design strategies included the use of extensive natural light with exterior shading of the glass, low-e glass, operable windows throughout; materials sourced within a 400 mile radius of the site, brick (a natural material), engineered wood floors, low flow toilets, steel with recycled content, aluminum with recycled content, low voc paints and high efficiency HVAC equipment.