YO! Home is a box of tricks that aims to offer a solution to the challenge of constrained living space in cities by transforming one room into five.

The 40 square meter studio apartment alternates between a lounge, kitchen, dining room, bedroom, and office, with storage space beneath the floors and a separate bathroom.

The demand for housing is not abating, so thinking about density and efficiency is key, says Sarah Watson, deputy director of the Citizens Housing & Planning Council in New York. We need a new way of looking at space.

Watson is exploring the potential of micro and transformable homes and believes that changing lifestyles have reduced space requirements.

In big cities people blend their public and private life, so the city is used as an extension of the home, says Watson. People are more likely to eat and socialize outside rather than at home. The change has already come and the (living) spaces are catching up.

Read more in CNN.