As-built drawings depict the building and all its components as they were actually constructed. Construction workers will typically compare the as-built drawings to older drawings and specifications that were made at the beginning of the project. Project managers use the as-built drawings to review any changes made to the specifications during the construction phase of the project. In general, as-built drawings display the location, geometry and measurements of the existing building. The drawings enable you to track and record changes made to the project throughout each stage of construction.