Blends of reinforced concrete, sand, and plastic polymers are building materials rather than powdered metals and plastics[ that desktop printers use]. Large robotic arms on a swivel generate fully functional houses with electricity, plumbing, roofers and windows, instead of fixed box-like machines.
The most mentioned houses on TreeHugger, from the house in Apis Cor outside Moscow, to WinSun, work in China and Dubai, and writes: 3D-printed construction pioneers take advantage of what they see as numerous advantages: lower costs, and consequent ability to pursue their designs, as well as simpler and stronger architecture The price for homebuyers is also lower. The Apis Cor building cost just over $10,000 last December. In comparison, the Habitat for Humanity build a three-bedroom, 1050-square-foot house that costs about $50,000.
There are several problems here; perhaps the greatest problem is whether 3D printing actually reduces costs. The comparison to the house Habitat is questionable; it has plumbing and heating and is not a ruble conversion. 3D printing is beautiful because it produces unique products that could otherwise require costly tools cheaply and fast; that’s why it is so often used for the prototyping process and for body parts where everybody is different. However, as Nick Allen said in the New York Times