Helmkamp Construction recently moved from a 4,600-square-foot space in Wood River, Illinois, into a 20,000-square-foot corporate headquarters building, which the company bought in March and recently renovated. The new location at 707 Berkshire Blvd. in East Alton, about a mile-and-a-half from their previous headquarters, doubles their office space and provides room for future expansion as well as lease tenants.