The amount of freedom and mobility granted by UBI might be enough to incentivize people to move if the rents started rising, increasing competition. Then landlords would either have to bear the extra cost of finding new tenants or lowering rent to competitive rates. Outside of price fixing, rent gouging at least partially relies on people being unable to afford to move.

Surely ubi has to be regionalised in some way. I think ubi without land value tax makes no sense.

New home construction, hopefully subsidized-affordable home construction.

Enough subsidized housing to serve more than a tiny handful of lucky applicants would be a foundational societal shift even more dramatic, and more difficult to pull off, than UBI.

But that's not what ubi is. Why not just assault the causes of high land costs if so?