modify the existing building without adding any new floors do not increase building height keep the building at exactly three floors total recess the lowest of the three floors inward the ground level of the existing three storey volume is set back upper two floors remain in their current position facade line of the first floor moves inward only clear setback visible from street level strong horizontal shadow line created by the overhang above no additional base volume no extra storey no basement visible no plinth expansion keep facade materials and proportions darker tinted glass remains three interior floors remain clearly visible behind glass