I suspect the answer is two-fold:

1) Pass legislation to ban the fed from pulling interest rates below 2%. The unprecedented ZIRP completely fucked up asset values and it will take decades to unwind it.

2) In cities, the government should own all the land and owners of properties should hold only a long-term lease. This will allow the government to control land use and upzone density while ensuring private building owners have skin in the game to actually build and maintain dwellings.