[Selanne_200]

Currently doing it myself as the owner-builder so I can chime in from experience.
We're currently looking at about 180-185/sq foot and the quality is fairly good for what we're putting in. (all plywood sheathing, no finger-joint studs, all granite/quartz counter-top, high efficiency boiler, cedar sidings along with stucco finish etc). We have been building it since july of last year but mind you, I think we're a lil slow compared to others, we're looking at about another 1.5 month before finish. From experience, if you're willing to put in the time to hunt for all the finishing materials yourself, the more value you're going to get out of your money. If you hire a GC, like what others have suggested, beware of shady GC where sub-trades are owed money and they place liens on your house. I think a general rule of thumb is, you get what you pay for ( for the most part).
I hope this helped you out a lil