What is the difference between usable square feet and rentable square feet ?
Rentable square footage of a given space includes factoring in a proportionate percent of common areas such as elevator shafts, common corridors, stairwells. Useable square footage is what you are left with. If thirty per cent of the building consists of common area, then the loss factor should equal thirty per cent. For instance, a space which is being marketed in such a building as 1,000 rentable square feet should equall about 700 useable square feet.
