A CAD file contains all of the information of one set but in an electronic .dxf or .dwg format. The CAD file is used to make major modifications or to bring a plan up to local codes by a local drafter. The CAD files can be opened in most architectural design programs and come with a copyright release allowing you to customize the plan. With the CAD package, you receive a one-time build copyright release that allows you to make as many copies of the plan as you like without infringing on copyright laws as long as the home is only built one time. Each designer retains ownership of the original copyright as well as any derivatives of the original plan.
