Another thing relevant to this is the growing number of new houses built with two master suites. There was a fuss awhile back about how this is a sign that married couples don’t share bedrooms anymore, but I think it’s really more that you’ve got more non-related adults living under one roof. If you’re single and can’t buy a house with one income, then pool your income with a friend to buy a place. Rather then draw straws for who gets to be the “master”, you can buy a place with two master bedrooms. Once prices come back down to reasonable levels, I wonder who’s going to want all those conjoined-twin condos?