https://www.bgr.com/2089651/3d-printing-robots-solve-housing-crisis/
As the name implies, 3D-printed houses are buildings that are primarily constructed by an automated arm extruding a special concrete mix. This material builds up the shell of the house layer by layer, which can reduce building costs by up to 35% and labor costs by as much as 80%, while also decreasing the amount of wasted material after completion. The process is mostly automated, but human workers are still on hand to install all the plumbing, electrical wires, insulation, HVAC systems, and roofs.
Thanks to 3D printers, houses can go up in days. In fact, Europe's biggest 3D-printed building was constructed in just under 6 days, and the world's largest house printer can build a home in a little over 3 days. And of course, reduced build time also means less energy needed for the process. Efficiency is the name of the game here.
Since 3D printing houses is more efficient than traditional building methods, this process might just help solve the housing crisis. The costs of labor, energy, and materials are comparatively lower (especially if material waste isn't tabulated into the price), so those savings could hypothetically be passed on to buyers. However, the savings might not stop there.
The single biggest advantage of 3D printing houses boils down to this: While traditional homes rely on insulation, 3D-printed wall systems are often built with insulated cavities and high-thermal-mass concrete that help manage heat flow. This can lead to lower energy and electricity bills — in fact, some 3D-printed homes are reportedly 40 to 60% more energy efficient than standard new builds.