This is a very subjective question. It can vary on several factors ranging from the quality of environment to the nature of your business. However there is a general rule of thumb. 10 employees to 2500 sq feet of super built up area.This gives you a couple of cabins, a dry pantry area, a conference room, a server room and 8 workstations. When calculating your own work space take the following into account: Current number of employees working out of the office space/work space The nature of your business (workforce intensive/space intensive or not) The equipment you need installed in the office space. Your growth plans. Office spaces are generally leased out for locked in periods. This means that your contractualcommitment is for at least amount of time. Depending on the nature of the contract this could vary, but generally this period is 3-5 years. No point in getting office space which will be obsolete in 6 months when you want to hire 5 more employees. Generally a 20% more than the immediate requirement is what is considered ideal. Style of working in the office space (some work is more collaborative in nature and thus might require more common areas while others like call centres require more individuality). Your architect, interior designer, workmen and installation staff need these inputs in order to develop the space as per your need.