The tower is exceptionally slender with only of gross floor area per floor, because of a zoning regulation limiting the total building floor area to twelve times the property area. Its façade is more ornamental than that of the average
International style tower, with horizontal strips of glass
curtain wall alternating with
spandrels of various types of stone, including green slate that was quarried in Wales. The building was fully renovated in 1991, and the highly visible CIBC logo at the top was redesigned in 2004 and again in 2013. Inside, levels 15 and 29 are transfer floors; level 16 is a triple-height
mechanical floor that is skipped in the
floor numbering of the passenger elevators. Levels 42-44 are also mechanical floors; level 45 was originally an indoor
observation deck but was closed in the 1970s. The top of the tower are actually an open-air raised partition, built sometime after construction, that hides the rooftop elevator control rooms. Without this extra structure, the actual roof height is , and approximately when counting the elevator penthouse. It is the fifth tallest building in Montreal, but an
antenna raises the total height to , the tallest pinnacle in Montreal. Until the end of 2018,
French-language radio station CKOI-FM transmitted its 307,000
watt signal from atop the building. The antenna has since been removed. ==Tenants==