Coming Soon: 3D-Printed Houses

Structures could be printed on-site in a matter of days or even hours

Square walls and windows could quickly become a thing of the past: there is no need for convenient mass-produced flat-pack materials here.

Exotic housing designs will be limited only by the imagination—and gravity, Professor Khoshnevis said.

Professor Behrokh Khoshnevis, from the University of Southern California, has explained how a concrete-style material could be used to "print" structures and walls three times stronger than standard concrete in a process he calls Contour Crafting.