It can be difficult for tenants to estimate what size of space of they need. You are going to pay per square foot for what you lease, so you want to make sure you’re utilizing every inch of every corner.
That’s where the 300 Rule of Thumb comes in.
You literally take the number of employees you have and multiply that by 300. It’s not an exact measurement, but it tends to arrive at a figure very close to what you require.
Excerpt from an an article written by Kelly Macsymic of Stuart Commercial.