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2. See: Stock Class.
3. An option contract of one type or another. For example, calls and puts are different classes of option, as are American style and European style options.
Subjective evaluation of the desirability of an office building based on its age, amenities, maintenance, and design. There are no hard-and-fast rules, and evaluations may change for a virtually identical building in two different markets.The classification is independent of the location; one commonly encounters comments such as “It's a class B property in a class A location,” meaning a less desirable building happily situated at a great location and thus able to command higher rents than might otherwise be expected.