Yes you can. As long as we get the foundation in before the ground freezes below 1’ deep, a winter build is no problem. What needs to be understood though, is that it does take longer to build a home in the winter than any other time of year. Due to the cold temperatures, everything and everyone runs a bit slower in the winter. We have had the pleasure of shoveling 12” of snow out of a 3,000 sq. ft. home while we were still in the framing stage. Fun times.