01/13/2009 AT 01:05 PM EST
"My major motivation is to be closer to family. My brother is there, my mother is there. We're hoping to break ground in March, and it will be completed right around the time we're finishing the last season of Lost, in March 2010. I really miss that kind of wide-open space, and there's a big part of me that wants the kids to live in that mountain air."
star Matthew Fox to Details
, talking about wrapping up the hit show and moving from Hawaii to central Oregon where he is building a house.