Final answer:
An as-built drawing serves as a permanent record of the actual construction details of a project.
Step-by-step explanation:
The type of drawing that serves as a permanent record of the actual construction details of a project is called an as-built drawing.
As-built drawings are created during the construction phase to show the final details and changes that were made during the construction process. These drawings are important for documentation and reference purposes, as they accurately represent the built structure or project.