According to HomeAdvisor, the average cost of having a new house built in the U.S. was $305,372 in 2016. Clearly, this cost can vary A LOT depending on what choices you make, and there are A LOT of choices when you decide to build a custom home. If you’re looking for a less expensive, easier to design, and more sustainable home, check out these 18 alternatives.Read MoreElemental Green