Pre-inspections are highly recommended, but not required. Pre-inspections advised the service member of his/her responsibility to bring the quarters to an established standards. Pre-inspections are also intended to inform service members of damages that need to be repaired or possible charges for damages. By not having a pre-inspection in some cases it just makes the final inspection longer.
For more information email the Housing Services Office: usarmy.stuttgart.usag.list.dpw-housing-email@mail.mil
Source: https://home.army.mil/stuttgart/index.php/my-garrison/all-services/HSO