While the building’s base is rectangular, its two towers are curved in cross-section and rise to differing heights. The east tower is 27 storeys (99.5 metres (326 ft)) tall and the west tower is 20 storeys (79.4 metres (260 ft)). Between the towers is the saucer-like council chamber, and the overall arrangement is somewhat like two hands cradling the chamber. The outer concrete surfaces of the towers have been ribbed, to prevent collapse of the fabric as a result of the expansion of the exterior surfaces, and the tearing apart of the fabric as a result of differences in air pressure on the two sides of each wing-like tower during the high winds characteristic of the Great Lakes. The north, west, and east elevations are more abstract and sculptural in contrast with the extensive glazing of south elevation facing the square; each presents a view of concave panels of concrete textured with split-faced strips of Botticino marble. To the east of the square is Old City Hall which is now a courthouse. From the air, the building is seen as a giant unblinking eye, thus the building’s original nickname of “The Eye of Government”. When finished, the building generated controversy among many people, who felt that it was “too futuristic” for the city.
The design for the public space in front of the new city hall, Nathan Phillips Square, was part of the competition. The square’s reflecting pool and concrete arches, fountain, and overhead walkways were thus also part of Revell’s submission. It has since seen several monuments, sculptures, and other works of public art added, and was renovated, but it continues to complement the city hall with its original Modernist design elements.