Land has always been an expensive property, especially if it is located in high-value locations. Of course, corporate offices would always want to get situated in the best locations, where they are accessible from their workers' and clients' homes. Because of this, prices in these areas have been high, pushing the owners of companies to look for ways to maximize whatever floor space they have, naturally.

While for smaller offices this may be solved by using portable space-saving equipments like folding tables and stackable chairs, this may not be effective (not to mention ridiculous) to use in large offices. There is a way to get around the problem in the form of hotelling.
To give you a formal definition, hotelling in the office, according to Wikipedia, is "...a method of supporting unassigned seating in an office environment." Hotelling in an office setting came around when recent studies conducted show that knowledge workers, especially consultants, agents, and other salespeople, spend only around 30% of the time inside the office. So, imagine if you will be assigning each and every one of these workers their own workstation. 70% of the time they are unoccupied! That's clearly a waste of space. In order to save space (and money as well), these workers are not given pre-assigned workstations. Instead, once they get to work, they log on to an office system showing the blueprint of the office and particular cubicles with nobody occupying. They then reserve these cubicles and start working.
So, you see, if you will be able to implement this kind of technique (assuming that your office is large enough to house such a system), then it would mean great savings for you.
Just read the Wikipedia article for more information about the topic.