The office building, also known as Tower 1, has 22 floors and stands 83 metres (272 ft) tall. The other office building has 2 floors and is known as the Tower 4 Pavilion. The two residential towers each have 21 floors, and stand 69 metres (226 ft) tall.
Westmount Square's shopping concourse houses boutiques and art galleries, with about one-third of the space reserved for private for-profit health clinics.Skylights were installed on the roof of the shopping concourse in 1990, which led to criticism among architectural preservationists.
The entrance to the shop gallery, on Greene Avenue, is decorated by a sculpture, The Chorus, by Sylvia Lefkovitz.