And in a lot of places, rent can actually be quite a bit cheaper than interest + taxes + whatever other costs borne by the owner. This was especially true at the height of the bubble. I was paying 6% interest on a place that would have rented for about what the interest alone cost me. So I was paying as much as rent would have cost in interest, plus taxes, plus condo fees, plus losing out on the ability to earn interest on the money I had put in for the down payment.

On the other hand, I'm now paying ~3.4% interest on a place that would rent for, again, about 6% of the purchase price per year. Even including other costs, I'm coming out decently ahead.

Of course there are other reasons to own rather than rent (or vice versa) aside from just which costs more, like stability, or freedom to move. But it is not a slam dunk easy decision as to which option costs less, even after accounting for the potential equity you build when owning with a mortgage.