Here is a robot that can move around a building site autonomously and lay bricks into pre-programmed structures. The In-situ Fabricator uses sensors and an onboard computer for 3D mapping of the building site, using it to figure out its location and move around. IF will be able to adapt to minor design variations as well.
Will these robots get advanced enough to replace all human workers? That remains to be seen. More information about this robot is available here.