The proposed edge follows a fence or an old driveway
An existing feature provides context but does not necessarily identify the legal boundary. Ask which record establishes the line and whether it matches the actual project layout. A surveyor can evaluate location questions that a casual map or agreement about lawn care cannot settle. The aim is to give the crew a verified work limit before permanent concrete makes correction harder.
Notice next: Collect the deed, plat and available survey without treating any one image as self-explanatory. Have uncertain boundaries clarified before approving the form layout.