Six Weeks: This 1,000-square-foot steel-framed weekend retreat outside of Joshua Tree is a "hybrid prefab" prototype fabricated in a factory but assembled onsite. This home was built in eight weeks for $325 per square foot, but the process has taught its builders to complete future projects in about six weeks for $265 a square foot.
The Blue Sky prototype house leads a second life as desert getaway for David McAdam and his partner Scott Smith.