Here's an excellent podcast (https://www.lifeofanarchitect.com/009-the-low-cost-modern-house/) about the factors affecting the cost of your new home. The podcaster is talking about a Modern house, but the same principles apply to any style.
One warning about the square foot cost numbers he mentions: The host is based in Texas - a much less expensive market than Minnesota. Add about $80 per square foot to the costs he mentions if you're building in Minnesota.
If you're an architecture nerd, check out the other episodes on itunes as well. Bob Borson is about the best architectural podcaster/blogger there is.