Lancaster County Amish and Mennonite craftsmen have been building Stoltzfus Structures’ sheds, garages and outdoor spaces in Atglen since the company began in 1976. The family-owned manufacturer now works from a 65,000-square-foot shop with about 100 team members, selling directly to customers and combining hand-built construction with tools such as an online 3D design builder. Its buildings come with a 10-year structural warranty and are delivered throughout the East Coast.