What Rekeying Actually Does — and Why It Beats Changing Every Lock
When a locksmith rekeys a lock, the internal pin tumblers inside the cylinder are replaced with a new set cut to a different height configuration. The result is that your existing lock hardware stays in place, but every old key that once opened it becomes permanently useless. Only the newly cut key — or keys — will work. This is not a workaround or a temporary fix; rekeying is a permanent, industry-standard security reset that locksmiths perform every day on deadbolts, door knob locks, and the more complex mortise lock assemblies common in older Toronto homes and commercial-grade residential buildings.
Replacing an entire lock makes sense when the hardware itself is damaged, outdated, or you want to upgrade to a higher-security grade. But when the lock is in good working condition and your only concern is controlling access, rekeying delivers the same outcome at a fraction of the disruption. A skilled technician can rekey most standard cylinders in minutes, and because it is a non-destructive process, your door frame, strike plate, and finish are left exactly as they were. For condos along St. Clair Avenue West or older brick homes in Leslieville where door hardware can be period-specific and difficult to match, preserving existing hardware is often the smarter choice.




