Builders aren't monoliths, and they're not part of any cartel. They are competitors. It is always advantageous for a builder to be the only one creating new hou

Builders aren't monoliths, and they're not part of any cartel. They are competitors. It is always advantageous for a builder to be the only one creating new housing; they benefit from supply restrictions that drive prices up, while selling new supply. It is always best for them to build as much as they possibly can, because no one builder can build enough to affect the market by very much.