The KWANTUM-E60 features an open-plan living area/dining/kitchen, two bedrooms, one bathroom,and a large covered veranda; creating an ideal holiday cabin, granny flat, or affordable home for a small family. The 'E' stands for economical and energy efficient, and '60' is the total footprint in square metres, which fits within the maximum 60 square metre requirement for dual occupancy (granny flat) regulations on suitably-sized residential sites in most Australian states. It can be built onsite in about five weeks for around  AUD $45,000 plus labour.