Rekey or Replace Your Locks? How to Decide
Moved house, lost a set of keys or had a tenant leave? You need the old keys to stop working. That doesn't always mean new locks. Here's how to choose.
Short answer: rekey if your locks are in good condition and you just want the old keys to stop working. It's usually cheaper because you keep the lock. Replace if the locks are old, worn, damaged or low security, or you want an upgrade such as a deadlock or a smart lock.
What rekeying means
A standard pin tumbler lock has small pins inside, set to match the cuts on your key. Rekeying means a locksmith takes the cylinder apart and swaps the pins for a new combination. You get new keys, and every old key stops working. The lock body, handle and finish stay exactly as they are.
What replacing means
Replacing swaps the whole lock (or the cylinder) for a new one. You get new keys and a new lock, which may be stronger, better designed or a different type altogether.
When to rekey
- You've just moved in. You don't know how many keys the previous owners, tenants, agents, builders or tradies still have.
- Keys have been lost, especially with your address.
- A tenant has moved out, or a relationship or housemate arrangement has ended.
- You want one key for every door. Compatible locks can often be rekeyed to the same key ("keyed alike").
When to replace
- The lock is worn or damaged. Sticking, loose, hard to turn, or the key keeps catching.
- It's corroded. Common near the beach on the Peninsula.
- It's low security. A basic latch on a back door with no deadlock.
- It's been forced or there's been a break-in.
- You want an upgrade: a deadlock, an anti-bump cylinder, a restricted key system or a smart lock.
Quick comparison
| Rekey | Replace | |
|---|---|---|
| Old keys stop working | Yes | Yes |
| Keeps your existing lock and finish | Yes | No |
| Fixes a worn or damaged lock | No | Yes |
| Improves security level | No | Can do |
| Can make all doors use one key | Often | Yes |
Rentals in Victoria
Consumer Affairs Victoria says rental providers must make sure every external door has a working deadlatch with at least one cylinder, and windows need latches that secure them against entry from outside (Consumer Affairs Victoria). Many rental providers rekey between tenants. Renters generally need the rental provider's consent before changing locks.
Don't forget the other locks
When you rekey or replace, think beyond the front door:
- back, side and laundry doors
- the door from the garage into the house
- sliding door locks and keyed window locks
- the garage, side gate, shed and letterbox
See lock changes and rekeying on the Mornington Peninsula and in Frankston.
Frequently asked questions
Your questions, answered
What does rekeying a lock mean?
A locksmith changes the pins inside the lock so it works with a new key. Old keys stop working, and the lock itself stays.
Is rekeying cheaper than replacing locks?
Usually, yes, because you keep the existing lock body.
Should I rekey when I buy a house?
Yes. You don't know how many keys previous owners, tenants, agents or tradespeople still have.
Can all my doors use the same key?
Often, yes, if the locks are compatible. A locksmith can rekey them to one key.
Can a renter change the locks in Victoria?
Renters generally need the rental provider's consent before changing locks. Check with your property manager.
Need a locksmith on the Peninsula?
Homes, cars and businesses. Call any time and tell us what has happened.