Your right I'm making assumptions in your favor, it just so happens the size of places people buy tend to be much larger then the ones they rent. In fact it's hard to even find many 2 bedroom rooms for rent in Seattle while they are the norm for condos. As someone who's recently bought in Seattle I've looked in most of the in demand areas (Fremont, Ballard, Capital Hill, Green Lake, Wallingford, Revenna, and Belltown) - and across the board it's significantly cheaper based on your guidelines to buy. So unless your talking about the same exact building - or maybe only new building I would be very surprised to find out otherwise. (