the precision required in home building is incredibly low, a drunk human can frame without even thinking.
It will probably just be a small group of people maintaining a few machines doing the repetitive work while humans put in the final touches and fix the broken shit.
definitely 20-30 years out though, its so much easier said than done.
They don't have to be at a construction site. It can be in a factory on a production line. Prefabricated homes have been around for a while. Mobile homes are probably the most common, but there are also modular and panel homes that can be made in a factory, then put together on-site.
This site has good info about factory homes. There's a lot of cool things going on in that area.
It will probably just be a small group of people maintaining a few machines doing the repetitive work while humans put in the final touches and fix the broken shit.
definitely 20-30 years out though, its so much easier said than done.