A good rule of thumb would be to figure 200 SF per person, which would come out to around 4,000 SF. With that amount/SF, it would include some circulation & other items. However, this will vary, depending on the business, usage, etc. I would think that you would need not less than 4,000 SF for 20 people, unless of course, all employees are jambed into cubicles or something similar.
Apr 14, 2010