Housing is expensive because there is a lot of demand. By nationalizing or similar policy forcing people to sell cheaper all you achieve is creation of a class

Housing is expensive because there is a lot of demand. By nationalizing or similar policy forcing people to sell cheaper all you achieve is creation of a class of preferential buyers (who are allowed to buy cheaply or get housing for free from the government) while excluding others from the market altogether. Those policies just hide the demand it won't magically disappear. Things you can do are: -increasing supply by changing laws around zoning, allow building more/higher etc. -introduce policies that makes it more attractive to live in less populated areas where land is cheaper (hard to say what works but maybe better/faster public transportation, more wfh, preferential tax treatment for companies that move to other areas, if enough of that happens new business/population hubs might start)