The 21 cities across the world with the most expensive office rental prices

Global economic growth is on the rise and this means more people are getting into work.

However, as demand for office space grows - so does the rent.

Knight Frank's newly released Skyscrapers Index, part of the Global Cities 2016 report, shows us where on earth the most expensive offices are. The index takes into account how much a square foot of office space costs in a high-rise building in cities throughout the world.

Generally speaking a majority of the most expensive offices in the world are in major financial centres, but some of the cities that make the list might come as a bit of a surprise.