"People who bought homes in Multnomah, Clackamas and Washington Counties last year paid more than the national average to get into their new houses and condos, according to a new report. At the same time, roughly 10 percent or more of local buyers made down payments of 3 percent or less."
http://www.oregonlive.com/front-porch/index.ssf/2015/03/portland-area_homebuyers_on_av.html#incart_river