Stolen vs Lost Keys: Rekey Your Locks Straight Away
- •Lost and stolen keys both create the same risk — unknown access to your home.
- •Stolen keys are higher urgency if your address was identifiable from your bag or wallet.
- •Rekeying permanently invalidates old keys without replacing the lock hardware.
- •Every external entry point sharing the lost key needs rekeying — not just the front door.
- •Same-day action is the only way to close the risk window before it becomes a break-in.
You’ve retraced every step, checked every pocket — and your keys are gone. Whether they slipped out at a café or were lifted with your bag, your home is now potentially accessible to a stranger. The difference between lost and stolen keys changes how urgently you need to act — but either way, today is the day to call a locksmith.
Does It Matter Whether Your Keys Were Lost or Stolen?
The risk level differs — but the right response is identical in both cases.
Lost keys may sit in a gutter unnoticed — but stolen keys are a deliberate security breach. If your keys were taken from a bag that also contained your wallet, gym fob, or any ID showing your address, a burglar has everything they need for a silent, traceless entry into your home.
Even genuinely lost keys carry real risk. An opportunist who finds them near your address only needs one unlocked moment. Most residential break-ins are opportunistic — don’t hand anyone that opportunity by waiting to see if the keys turn up.
If your keys were in a bag containing your wallet or any ID — treat this as a stolen keys emergency and call a locksmith the same day. The combination of key plus address is all a burglar needs.
What Does Rekeying Actually Do to Your Lock?
It's faster and simpler than most Perth homeowners realise.
Rekeying means a locksmith removes the lock cylinder and replaces the key pins — leaving the driver pins and springs untouched — with a new configuration. Your old keys — including any copies you didn’t know existed — immediately stop working. A new key is cut to match the updated pins.
The lock body, door hardware, and strike plate are all left exactly where they are. You’re not paying for new hardware — just a new key combination. A professional rekey takes around 20–30 minutes per lock and costs less than full lock replacement.
For the full step-by-step breakdown of what happens inside the cylinder, the hub article Lost or Stolen Keys in Perth: What to Do Next and How to Secure Your Home Fast covers the complete process and what to prioritise first.
Should You Rekey or Fully Replace the Lock?
The right answer depends on your lock's condition and age — not just who has the key.
If your locks operate smoothly with no rust, stiffness, or visible damage, rekeying is almost always the smarter move. It achieves the same security outcome — eliminating all previous key access — at a lower cost and faster turnaround.
If your locks are corroded, damaged, or more than 10–15 years old, losing your keys is the perfect trigger to upgrade. Perth’s coastal climate accelerates corrosion on exterior hardware — what looks minor on the surface is often far worse inside the cylinder.
Ask your locksmith to assess the cylinder condition before defaulting to a rekey on ageing hardware. The cost difference between rekeying and replacing narrows considerably on older locks — and the security uplift from new hardware is significant.
Which Locks in Your Home Actually Need Rekeying?
Don't just rekey the front door — every shared entry point is a gap.
If your lost key opens the front door, it likely opens the back door and side gate too — especially on a matched-key or master key system. A partial rekey leaves gaps a determined person will find.
- •Front door — highest priority, rekey or replace first
- •Back and side entry doors — equally critical, often overlooked
- •Garage entry into the home — a common secondary access point
- •Deadbolts and separate security locks — each cylinder needs individual attention
- •Storage sheds or workshops if the same key was used
A licensed locksmith can assess your full set of entry points in a single visit and rekey everything that shares the lost key’s profile — so nothing is left exposed. If you’re also curious about what it costs to get new keys cut, the related article on how much it costs to replace lost or stolen house keys in Perth covers typical pricing without surprises.
Your Lost and Stolen Keys Questions Answered
Straight answers to what Perth homeowners ask most after losing their keys.
How quickly should I rekey after losing my keys?
The same day is the safest answer. Every hour you wait is an hour of potential access for whoever has your keys. Most licensed Perth locksmiths offer same-day rekeying — call immediately rather than waiting until it’s convenient.
Can a locksmith make a new key without the original?
Yes — a licensed locksmith can decode your existing lock cylinder and cut a new key without needing the original. This is covered in detail in the related article on whether a locksmith can make a new key without the original, which explains the techniques used and what to expect.
Is rekeying as secure as getting a brand-new lock?
Yes — when the lock hardware is in good condition. Rekeying does not weaken the lock; the security rating stays identical. Only the key combination changes. If the lock is damaged or outdated, replacement is the right call — but a sound lock that’s been rekeyed is just as secure as a new one.
What if I'm locked out and have also lost my keys?
Call 0481 365 802 immediately — Ultimate Locksmith Perth operates 24/7 and can handle both the lockout and the rekey in a single visit, saving you a second callout fee. The related article on what to do immediately after losing your keys in Perth outlines the full sequence of steps to follow.
Ready to Secure Your Home Today?
Lost or stolen keys are a same-day problem — don’t leave your home exposed overnight. Call 0481 365 802 now or get in touch to book a same-day rekey across Perth.
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Part of our guide: Lost or Stolen Keys in Perth: What to Do Next and How to Secure Your Home Fast