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The Mystery of the Missing 13th Floor

Posted by Robert Lacy on April 10, 2018

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Throughout history, the number 13 is associated with bad luck and a sense of impending doom. There’s even a term for extreme fear of the number: triskaidekaphobia – which if you try to say that out loud, it might be unlucky for your tongue.

Triskaidekaphovia definition

In honor of the upcoming Friday the 13th, we’re taking a look at the mystery of the missing 13th floor. The majority of buildings don’t have one, and this post will explore the reasons why.

Since this is a blog about insurance, it may interest you to know the first skyscraper was built as the regional headquarters for an insurance company. Constructed in Chicago in 1885, the Home Insurance Building did not have a 13th floor.

Lest you think the superstition has died down since then, consider this. Across the street from the WSRB office, a 38-story hotel and condominium building is under construction. Like the Chicago Home Insurance Building, this new tower also lacks a 13th floor.




Since the introduction of modern skyscrapers, owners have continued to worry about superstitious tenants refusing to inhabit that “unlucky” floor. The Otis Elevator Company reports that 80 to 90% of the elevators they’ve installed in skyscrapers and large hotels do not have a 13th floor button. Looking into it, this appears particularly true for residential buildings. It’s one thing to spend 40 hours a week working on the 13th floor, but sleeping, eating and playing there may be too much.




On the flip side, the iconic Empire State Building does have a 13th floor. Triskaidekaphobic tenants aside, for 40 years it stood as the tallest building in the world (1931 – 1972). And it remained longer than any of the other eight buildings which have held that record during the last century.

Where did a fear of the number 13 begin? Nobody knows for sure, but it’s an ancient phenomenon.

At the Last Supper, Judas was the 13th guest. In Norse mythology, Loki crashed a banquet of a dozen gods. As the 13th partygoer, he caused a celestial uproar when he killed one of these divine guests with a poison arrow. In many old stories, three might be a crowd, but 13 turns tragic.

Of course, we all remember Apollo 13 (“Failure is not an option.”) Not the most successful lunar mission.

When I retire, I have an idea for a side job, inspired from a 1977 article in the New York Times entitled “13th Floor, Anyone?” Here is what it entails:

An aversion to 13 at the table became entrenched in the modern world, particularly in France, where if 13 guests somehow ended up on an invitation list a 14th was hurriedly pressed into service. Some Frenchmen—known as quatorzes —earned a living by attending dinner parties to sit in the 14th chair.”

However, 13 isn’t all bad. Taylor Swift was born on December 13th and considers 13 her lucky number. If you get a baker’s dozen at the bagel or donut shop, that 13th one is still pretty tasty. (This is not a music or diet blog, so keep your comments to yourself.)

In addition, National Karaoke week runs from April 15 to 21 this year, so you won’t have to hear me sing on Friday the 13th.

Back to the Home Insurance Building. It turns out the owner wasn’t superstitious after all. The reason it didn’t have a 13th floor was because it was only 10 stories high. Even after an addition in 1890, its maximum height was only 12 stories.

With that story, this post comes to an end. Here’s wishing you a safe, lucky and claims-free Friday, April 13th.

Topics: Building Construction