There have been a few recent developments (I remember hearing about a concrete 3D printer), but it seems that the technology just isn't there yet. The problem i

There have been a few recent developments (I remember hearing about a concrete 3D printer), but it seems that the technology just isn't there yet. The problem is that the robots need to be small (enough to be transportable and reusable), cheap (cheaper than construction workers) and mobile (small => you need many to slowly build up the building). Most robots don't have that level of sophistication yet. All the manufacturing robots are stationary and (relatively) large, and mobility is something of an unsolved problem. This is not to say that it is impossible, just that I think there are significant engineering hurdles to robots building skyscrapers (maybe smaller houses first?).