I'm not sure how you get there without killing or violently subjugating tens of millions of people.

Everything preventing what you want is backed by a law. On the other side of that law is someone making a buck either via business being driven straight to them or business being driven away from someone else and they will fight to preserve it.

Even a simple amendment to the clean water act to exempt residential square footage would have every asshole who makes money off an engineering stamp up in arms. Even some guy who designs bridges would be pissed because he doesn't to compete with all the other labor that would put on the market.

Wash rinse repeat for literally every other issue that's roadblocking the construction of housing.

And this is assuming you want to just develop existing areas further (turn suburbs into cities, exurbs into suburbs, as happened from ~1870 through ~1970). Creating cities from scratch is way harder. Where are those people gonna work?