Mind blowing fact: All of the world's ten tallest buildings were built in the past 10 years. Six were built in the past 5 years and three in the past year. Skyscrapers only seem to be getting taller with time.

A supertall skyscraper is a building with a height of 300 meters or more. A megatall skyscraper is one with a height of 600 meters or more. In 2000, there were 25 supertall skyscrapers; now there are 131. Megatall skyscrapers did not exist until 2010; now there are three.

I found this fascinating article from 2011 that speculates on what will be the 20 tallest buildings in 2020.

Image: the tallest buildings in 2020.

In 2000, the average height of the top 20 buildings was 375 meters; in 2010 it was 439 meters. By 2020, the average height of the 20 tallest buildings will be 562 meters.

*Credit: CTBUH*

The late 1990s typically saw 2-3 supertall skyscrapers (>300 meters) being built annually. By the beginning of the 2010s, this had risen to 9-10 supertalls per year, including 1 megatall (>600 meters) per year. By 2020, we will see 15-20 supertalls per year, including 2-3 megatalls per year. As the article notes, "In terms of height, therefore, 600 m seems to be the new 300 m." Not only that, but we will see the world's first kilometer-high building, the Jeddah Tower. Interestingly, East Asia (esp. China and Korea) are becoming more dominant than the Middle East in the skyscraper field.

Okay. With that in mind, imma put on my futurist hat and make some predictions about skyscrapers in 2030.

- In 2030, the average height of the 20 tallest buildings will be 734 meters (for comparison, the Burj Khalifa is 830 meters tall).
- The world's tallest building will be about 1200 meters tall. It will be located in China.
- Four or five of the world's five tallest buildings will be in East Asia, most of them in China.
- There will be over 500 supertall skyscrapers (>300 meters), with 40 more being constructed every year. Eight to ten megatall skyscrapers (>600 meters) will be constructed every year.
- We will need an entirely new skyscraper class to describe buildings over 1 kilometer in height. 'gigatall' would be a logical extrapolation from 'megatall', but it somehow sounds sill. Thus, 'hypertall skyscraper' will refer to a building over 1000 meters high.

By 2040:

- The average height of the 20 tallest buildings will be 955 meters, about 50 meters less than the Jeddah Tower.
- The current glass and steel skyscraper design will likely be somewhat dated. Perhaps carbon nanotech or advanced ceramics will be the way of the future?
- EDIT: The first fully 3D printed buildings will have been built in the Far East.

**Edited by Jakob, 23 July 2016 - 05:34 PM.**