Constructor is deemed synonymous with the term “builder.” It refers to any person or organization who undertakes, offers, submits a bid to, or himself or through others, construct, alter, repair, add to, subtract from, improve, move, wreck or demolish any building, highway, road, railroad, excavation or other structure, project development or improvement, or do any part thereof, including the erection of scaffolding or other structures or work in connection therewith.