Urban housing must be scalable and affordable. The different types of 3D construction technology aimed at this goal include mobile gantry printers, robotic spray systems, and rapid-curing extrusion tools. These technologies cut material usage, reduce labor costs, and speed up delivery. Governments in India, Latin America, and Africa are deploying them to meet growing urban demands. Many machines run on solar or hybrid power, aligning with energy efficiency goals. Builders can now deliver full apartment units or row housing in a fraction of the time, with better durability and safety standards. These affordable housing solutions powered by 3D printing are changing urban landscapes for the better.