> First, it costs way more than $200k/unit for new builds where I live (Seattle).
That's the point. If you restrict where they can be built, and how they can be built, they cost more to build. And then prices go up.
> The biggest cost these days is simply labor. Construction workers aren't cheap.
This is part of the regulatory cost. Rules that require labor-intensive construction methods (preferred by both labor and landlords because they both want new construction to be more expensive), and licensing requirements that statutorily take a long time or significant money to satisfy (e.g. multi-year apprenticeships, expensive licensing exam fees) rather than immediately licensing anyone who can pass the exam and not charging to take the test.
> China and India just don't magic up these buildings, and often times it is used as a jobs program
At which point it's a government subsidy, but that doesn't really get you out of anything at scale. Somewhere or another somebody is paying for the construction.
> But those cheap to build flats are still going for $1 million/each in cities like Shanghai or Shenzhen.
You can allow something to be built without allowing enough of something to be built.
You can also build enough of something and still have high prices because of some other constraints or regulations preventing the people paying the high prices from using some of the supply, so it goes to waste.
But these are not the reasons that a $1000/month flat in India is unaffordable to locals. The reason for that is that local wages are low.