Locksmith advice
Rekey or Replace Your Locks? The Honest Guide for Williamstown Homes
Rekeying vs replacing locks explained: when each makes sense, what it involves, and how to decide after moving house, losing keys or a break-in in Williamstown VIC.
By the team at Williamstown Locksmith Service · 3 October 2026
"Do I need new locks, or can you just change the key?" It's the question we hear most. Here is the honest answer — including when the cheaper option is the right one.
What rekeying actually means
Inside a pin-tumbler cylinder are small spring-loaded pins of different lengths. Your key lifts them to exactly the right height. Rekeying swaps those pins for a new set, so:
- ✅ Your existing lock and hardware stay.
- ✅ A new key works.
- ❌ Every old key stops working.
What replacing means
Replacing removes the lock body or cylinder and installs new hardware. You get a new key and a new mechanism — useful when the old one is worn, damaged or simply not secure enough.
Quick decision table
| Situation | Usually the best choice |
|---|---|
| Just moved into a house or unit | Rekey (unknown key holders) |
| Lost keys, no address attached | Rekey |
| Keys stolen with your address | Rekey urgently, consider upgrades |
| Lock is stiff, sticking or worn | Repair or replace |
| Break-in or forced entry damage | Replace damaged hardware |
| Want one key for all doors | Rekey to key alike (if compatible) |
| Old, low-security lock | Replace / upgrade |
Signs a lock needs replacing, not rekeying
- Key turns but the bolt doesn't fully throw.
- Visible damage, rust or a loose cylinder.
- Door has dropped and the bolt fights the strike plate (sometimes a simple adjustment fixes this!).
- The lock is a cheap knob set on an external door with no deadlock.
The "one key for everything" bonus
If your front, back and garage locks share a compatible keyway, they can often be rekeyed to work on one key. Fewer keys, less to lose.
Our approach
We'll look at what you actually have and tell you whether a rekey, repair or replacement makes sense — we don't push new hardware when a rekey does the job. Learn more about our rekeying & key services and residential locksmith services, or call 03 6413 6719.