Lost or Stolen Keys in Perth? Why an Immediate Lock Rekey Could Save You From a Break-In
- •Lost or stolen keys give unknown people potential access to your home — rekeying eliminates that risk immediately.
- •Rekeying changes the internal lock pins so old keys no longer work, without replacing the entire lock.
- •A rekey is typically faster and cheaper than a full lock replacement.
- •The longer you wait after losing keys, the greater your exposure window — act the same day.
- •A licensed Perth locksmith can rekey most locks on-site in a single visit.
You’ve checked every pocket, every bag, retraced every step — and your keys are gone. Whether they slipped out at the shops or were taken with your bag, your home is now potentially accessible to a stranger. This is not a situation to sit on overnight.
What Exactly Happens When You Rekey a Lock?
It's faster and simpler than most Perth homeowners realise.
Rekeying means a locksmith removes the lock cylinder and replaces the internal pin tumblers with a new configuration. Your existing keys immediately stop working — and a new set is cut to match the updated pins.
The lock body, hardware, and door frame are all left intact. You’re not paying for new hardware — just a new key combination. For a deeper technical breakdown, the Complete Guide to Lock Rekeying in Perth covers the full process, costs, and timing in one place.
Rekeying is not a temporary fix — it permanently invalidates every copy of your old key, including ones you didn’t know existed.
Why Are Lost Keys a Genuine Break-In Risk?
An opportunist only needs one unlocked opportunity — don't give them yours.
Most residential break-ins are opportunistic. A key found near your address — or lifted from your bag alongside your wallet containing ID — hands a burglar silent, traceless entry into your home. No forced door, no noise, no obvious evidence until you discover something missing.
Stolen keys are even higher risk. If your keys were taken deliberately, there’s a reasonable chance the person knows where you live. Acting within hours, not days, is the only way to close that window before it becomes a problem.
Should You Rekey or Fully Replace the Lock After Losing Keys?
The right answer depends on the condition and age of your existing locks.
If your locks are in good working condition — no rust, no stiffness, no visible damage — rekeying is almost always the right call. It’s faster, less expensive, and just as effective at removing access from lost or stolen keys.
If your locks are corroded, worn, or low-security grade, lost keys are the perfect trigger to upgrade entirely. Our related guide Rekeying vs Replacing Locks: Which Option Is Right for Perth Homeowners? walks through the decision criteria clearly so you don’t overspend — or under-protect.
If your locks are more than 10–15 years old and you’ve just lost your keys, replace rather than rekey — you’ll get better security and modern pick resistance for a modest extra cost.
Which Locks in Your Perth Home Need Rekeying?
Don't just rekey the front door — think about every point of entry.
If your lost key opens the front door, it likely opens the back door and side gate too — especially if you’re on a master key or matched-key system. A partial rekey leaves gaps a determined person will find.
- •Front door — your highest priority, rekey first
- •Back and side entry doors — often overlooked, equally critical
- •Garage entry into the home — a common secondary access point
- •Deadbolts and separate security locks — each cylinder needs rekeying individually
- •Storage sheds or workshops if the same key was used
A licensed locksmith can assess your full range of locks in a single visit and rekey everything that shares the lost key’s profile — so you leave nothing exposed.
Is This Also the Right Time to Set Up a Master Key System?
Turn a stressful event into a smarter long-term security setup.
If you’re rekeying multiple locks anyway, it’s worth asking your locksmith about a master key system — one key that opens all your locks, with individual keys for specific doors if needed. It eliminates the heavy keyring problem that causes keys to get lost in the first place.
If you’ve recently moved in and this is your first rekey, the related article Moved Into a New Home in Perth? Here’s Why Rekeying Your Locks Should Be Your First Priority is worth reading alongside this one — it covers the full new-home security checklist.
Your Lock Rekeying Questions Answered
Straight answers to what Perth homeowners ask most after losing 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 or emergency call-out rekeying — call immediately rather than waiting until the weekend is over.
Will Rekeying Work if My Key Was Stolen, Not Just Lost?
Yes — rekeying is equally effective whether your key was lost or stolen. Once the internal pins are changed, the stolen key becomes useless on your locks. If the theft was part of a burglary or targeted incident, also consider whether any locks were tampered with — damaged locks may need full replacement rather than rekeying.
Can I Rekey My Locks Myself to Save Money?
DIY rekeying kits exist, but they require the correct pin kit for your specific lock brand and precise assembly — an error leaves the lock non-functional or easy to bypass. A licensed locksmith completes the job correctly the first time, often for a cost that’s lower than the risk of getting it wrong. The related guide How Lock Rekeying Works: A Step-by-Step Guide From a Perth Locksmith explains the process if you want to understand what’s involved before deciding.
Does Rekeying Affect My Home Insurance?
It can work in your favour. Some insurers require evidence of reasonable security measures after a key loss or theft — and rekeying demonstrates exactly that. Check your policy, and ask your locksmith for a receipt or service record you can provide to your insurer if needed.
Lost Your Keys? Call Us Now and We'll Rekey Today.
Ultimate Locksmith Perth is available 24/7 for emergency rekeying across Perth suburbs — call 0481 365 802 and we’ll come to you fast.
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Part of our guide: The Complete Guide to Lock Rekeying in Perth: What It Is, When You Need It & What It Costs