> this cannot be solved from the federal level.
I disagree. The federal government invests enormous resources into subsidizing home ownership. Everything from Fannie Mae guaranteeing mortgages to not taxing home owners on the imputed value of rent.
And I think that's all well and good, home ownership has many positive externalities. But there's zero point subsidizing demand for something when supply in inelastic. In those cases subsidies don't result in expanded supply, only increased prices. For example even if diamonds are good, it wouldn't make sense for the government to match first time diamond buyers payment, because the supply of diamonds is inherently limited. All it would do is drive up prices.
Modest proposal: the federal government should revoke all of its housing subsidies in any municipality that restricts the supply of housing. San Francisco would be more than free to continue to block development. But if it chooses to do so, then San Francisco home owners should no longer be eligible for Fannie/Freddie mortgages, no longer be able to tax deduct mortgage interest, and should have to pay income tax on the imputed rental value of their home.