Postal Station B is listed in the register of Historic Places in Canada.  In describing its architectural significance that register says that it represents, "... a very good example of the Classical and Château styles used in civic buildings during the 1930s.  The building’s roof was imposed by a political preference for large copper roofs, often in the Château Style, and its smooth stone face and minimal decoration reflect the simplified character of classicism during the early 20th century. Its very good functional quality is shown in the excellent craftsmanship and materials used in the exterior construction, as well as the rich treatment of the public spaces within. The building remains one of the best examples of the architect W.E. Noffke’s work."