The question behind a change of key
You may have moved in, recovered a missing key or changed who uses the property. The concern is the history of key copies, even when the door still works. Describe the access change you want and list the openings included. Lock rekeying can then be considered against the actual cylinders and their condition.
Do not assume matching handles mean matching key systems. A front entrance, rear door and garage pedestrian door may have different mechanisms. If one-key convenience is a goal, ask whether the installed hardware is compatible. Suitable work needs assessing rather than inferred from the house's age or a photograph.
