No number 13

Here is a funny little detail I noticed recently about the business park where I work: there is no number 13. There are about twenty offices, but none of them is at number 13. I wonder who was suffering of triskaidekaphobia when they were allocating address numbers to the buildings. It's a small business park, and a fairly young one I'd say, it's as bland and anonymous as a business park can be, yet it has that peculiarity. Which may not be a peculiarity. For all I know it's something common to many business parks here and elsewhere.