When it comes to office space, it’s pretty clear that the glamorous downtown tower with imported Italian marble in the lobby and concierge/valet services is classified as “Class A” in the world of commercial real estate. At the same time, it probably comes as no surprise that the no-frills space with its paneled walls and fierce fluorescent lighting located in a less-than-prime part of town is likely designated “Class C.” However, classifying office space isn’t always this cut and dry. What about all the space in between these extremes? And what do the “Class A, B and C” rankings really mean and who determines them?