We see conceptual modular designs of this kind all of the time, but rarely such exquisite real-world proof of how fast construction can be in the age of prefabrication.

The recently-completed One9 building in Melbourne, Australia, using the Hickory Group’s Unitized Building system to install 34 units in less than 1 week around a prefab-paneled concrete core.

Created by architect Nonda Katsalidis, this approach allows each one-or-two-bedroom dwelling to be built almost entirely offsite then stacked like a puzzle piece onto the site, completed with decks and fenestration in place.

Utility connections are also built in, making it easy to hook up electrical and plumbing systems. In theory, the process can be used to build up to 70-story structures.

The building boasts a number of sustainable materials and strategies, making its speed of construction all the more impressive. Per JetsonGreen, “The units in the building are all fitted with double glazed windows that offer superior thermal protection and acoustic performance. The building is also equipped with a grey water recycling system. There is also a rainwater harvesting system in place.

As for green energy, “Rooftop mounted solar panels provide enough energy to heat the water used up by the residents, while the building is also equipped with a H.W.S system that provides highly efficient water circulation. Energy efficient lighting is installed throughout the building, to conserve energy expenditure. The One9 building also has a 6 Star energy rating.”