How much space does an occupier need, this is extremely important and sometimes difficult to know. The rent is directly linked to how much space you take and therefore it is extremely important, especially for smaller, growing firms to be as efficient as possible and not allow for any wasted space. The old rule of thumb was 100 sq. ft. per person, therefore 1000 sq. ft. would be ideal for 10 people, and this would take into account for space for 10 employees to work, a small meeting room, boardroom and kitchenette.