Again, I'm not saying to REQUIRE any of those things, simply make them not illegal. If developers build an oversupply housing that people do not deem acceptable

Again, I'm not saying to REQUIRE any of those things, simply make them not illegal. If developers build an oversupply housing that people do not deem acceptable at any price, then people will not buy/rent them and they will be removed. If people are renting them, then people find it an acceptable tradeoff. Sweatshop jobs have been more attractive than rural poverty since the Industrial Revolution began, and small, "substandard" apartments are a choice that many people would choose over longer more expensive commutes, health care, better nutrition, working one job instead of two, or any thing else that can be purchased with money.