It should also not be lost upon people that robotics is making huge improvements, too.
The value of human labor is going to the price of electricity and raw materials outside of a few, small realms and people are not ready for that fact.
The value of human labor is going to the price of electricity and raw materials outside of a few, small realms and people are not ready for that fact.
These can be trucked or flown into place.
Factory built simplifies full trade critical path, with pipeline schedule of custom variations moving through to be wired, plumbed, built out and finished.
Also opportunity for automation streamlining.
Simpler offerings of that market look like: https://modularwa.com.au/
That's why I differentiated between robots working on new construction sites, where I do think that a 15-20 year timeline is entirely feasible (not necessarily desirable, but feasible). That's an entirely different task than renovations in an existing building, which is much *much* harder even for humans.
Also note that there's another way of thinking about where technology will take housebuilding that already exists: more factory-assembled modular cosntruction. That's less popular in the USA, with its focus on single family "unique" homes, but is taking off elsewhere and is already highly automated.
For wiring/plumbing/ducting runs ... not so much.