Generally yes. The necessary measures depend on the extent of the need for restoration or the damage. Working on site is usually even advantageous. Most conservation, protective, maintenance and cleaning activities can usually be carried out directly at the object's location. The same applies to simple interventions, such as fixing loose veneers, repairing defective locks, surface regeneration, and the like.
For more complex measures, however, transport to my ZRW Berlin is essential.