Maybe this one just passed by before the new Commercial Residential District (CR20-C20/R20) zoning for the CBD comes into effect in June because having all office/lobby on main floor would not pass anywhere in the CBD, especially not along the Stephen Ave Retail area once this new zoning comes into effect.
http://www.calgary.ca/PDA/LUPP/Docum...f?noredirect=1
From Page 7-10, restrictions of 50% of main floor for office use, certain streets office not allowed, including where this property is located.
35% max lobby area on main floor for the main streets listed, 70% in remaining areas.