Free market won't work. It doesn't work because you can't build enough houses. For the free market to work you'd have to build way more houses than people need because owning house without tenants is extremely cheap and you don't have to lower the rent (or sell it at lower price). You can just let it be unrented for quite a long time and still come ahead when tenant or buyer finally arrives.
I think you should just raise cost of owning additional houses so keeping them empty really hurts.
Rent control seems like government micromanagement that we want to avoid with BI.
Making empty houses more expensive through property taxes is absolutely an option. I think it's totally fair to reimburse the community for taking land away from the community to put an empty house on it.
My point is: there needs to be competition on the supply side in the housing market, to keep prices somewhat related to the real cost of the house. If this isn't possible, the government needs to step in. I hope to avoid that where possible, though it's certainly necessary to prevent landlords from raising the rent on people after they settled in a home.
The community didn't own the land, so didn't lose it; It's more accurate to say - the community still has to manage the land (e.g. policing, fire service) so property tax always needs paying, and should be relative to those services.
Private ownership of land does take it away from the community. The problem is that we've gotten so used to everything being privately owned, that we've grown blind to the possibility of land not being owned by anyone and belonging to everybody.
Land that isn't private is still owned by the government, and maintained by taxes. I wouldn't say public land is belongs to everyone, so much as it belongs to no one - there are limits to what it can be used for e.g. can I build a house on such land?
I believe free market will work. I feel most around here keep imagining how UBI will affect the CURRENT housing market which is mostly tied to the proximity to jobs. In fact UBI will significantly change this market.
UBI will, in theory, get people stuck near "job hubs" with extremely high cost of living (most of that being rent) to move to more rural areas. They will no longer be tied to commuting 1h each way to work 40-60h a week to work a dead end soul sucking job just to spend 50% of income on rent and finally just move somewhere more hospitable and conducive to bettering themselves.
And also, you CAN build new houses in lots of places that are not the current "city centers".
I think you should just raise cost of owning additional houses so keeping them empty really hurts.
Rent control seems like government micromanagement that we want to avoid with BI.