[dx87]

Because there isn't much work if you live there. If you had UBI though, that wouldn't matter, so you could just live in a rural area for cheap.

[BurningFrog]

This of course directly contradicts the claim that people will keep working with UBI.

[saint_fiasco]

If they like their current house they'll work hard to pay for it. If they can't find a job or don't like their current home that much they can use their UBI to move and make room for a more productive citizen to move into the city. This makes the allocation of housing more efficient.