[eropple]

> I am not sure. If I want to live without a child, I would probably not spend money on a second bedroom.

I would. I've rented 2BRs my entire adult life. I needed an office--that room's for work (even if that work is my side projects or whatever), the rest of the house is for living. We bought a 3BR and collapsed a wall to make it a 2BR. One bedroom and one (very large) office.

> There is also a chicken and egg problem: the fact that new developments target childless people is one of the reasons raising a child is expensive.

New developments mostly target people with disposable income. That rules out most families.

I am, to be clear, in favor of subsidies and policies to encourage urban families; I think having kids in neighborhoods is a good thing for the neighborhood as a whole. But you're ascribing intent where none seems to exist.