The market isn't free, there's a ton of restrictions and policies that benefit large corporations while making it very difficult for new companies to make any headway against their competition

What else but regulations prevents the creation of surplus housing? That poverty as a feature post, why are those houses not been built?

It only takes a few people to solve the housing market in a liberal market by organizing the construction. With regulations, it takes a majority to make a change. The same majority who could rise taxes and build affordable housing with tax money right now.

There is land, unemployed people who can do the construction and people with income who seek housing and will pay for it. Who is preventing the construction?

Communists irl