
How Master Key Systems Create Tiered Access for Commercial Properties
A master key system works by engineering the pin stacks inside each lock cylinder so that more than one key bitting can rotate the plug. At the bottom of the hierarchy sits the change key — it opens exactly one lock. Above it sits a master key that opens every lock within a defined group, such as all doors on the second floor or every room in the HR wing. A grand master key opens all groups, and in larger enterprises, a great-grand master key sits above even that. The practical result is that a facilities manager can carry one key for the whole building while a shift supervisor carries one key for their department and a staff member carries one key for their individual workspace. No one has more access than their role requires, and rekeying a lost key affects only the cylinders it was supposed to open.
The lock hardware you choose at each door determines how sophisticated the hierarchy can become. High-security mortise lock bodies — the style recessed into the door edge rather than surface-mounted — give our technicians the pin stack depth needed to support complex key sections with many key changes. A mortise lock also integrates the latch, deadbolt, and sometimes an auxiliary function into a single chassis, which is why it is the hardware of choice for commercial locksmith work on office suites, medical buildings, and multi-tenant spaces throughout Vancouver. We work with Schlage, Medeco, and other reputable manufacturers whose cylinders are engineered specifically for master keying, and we document every key code in a secure record we provide only to the authorized account holder.


