Can a Locksmith Make a New Key Without the Original? What Perth Homeowners Need to Know
- •Yes — a licensed locksmith can cut a new key without the original using lock decoding techniques.
- •The method used depends on your lock type and whether you want a key copy or a full rekey.
- •If keys are lost or stolen, rekeying is almost always safer than simply cutting a new key.
- •A locksmith can rekey most Perth residential locks on-site in a single visit.
- •Acting the same day you lose keys closes your exposure window before a break-in occurs.
You’ve lost your house keys and the question hitting you right now is simple: can a locksmith make a new key without the original? The answer is yes — but the more important question is whether cutting a new key is actually the right response, or whether you need something more.
How Does a Locksmith Make a Key Without the Original?
Professional techniques that work even when every copy is gone.
A licensed locksmith has several methods available. The most common is lock decoding — the locksmith removes the cylinder, reads the internal pin heights, and uses that information to cut a key that matches the existing configuration exactly.
Some locks can also be decoded without removal, using a specialised decoder tool inserted into the keyway. For locks with a registered key code — common on newer Lockwood and Assa Abloy products — a replacement can sometimes be cut directly from the code number stamped on the lock or recorded at point of sale.
Decoding and cutting a new key to your existing lock does not invalidate old keys. If your keys were lost or stolen, anyone holding a copy still has access. This is why rekeying — not just key cutting — is the recommended response.
Should You Get a New Key Cut or Rekey the Lock?
The answer depends on why you need a new key in the first place.
If your original key is simply worn out or you need a spare, cutting a new key to the existing lock is perfectly reasonable. But if keys are lost or stolen, cutting a new key solves only half the problem — you can get back inside, but whoever has the old key still can too.
Rekeying changes the internal pin configuration so that all previous keys stop working — including ones you didn’t know had been copied. Your new key becomes the only one that operates the lock. The full process is explained in the Lost or Stolen Keys in Perth guide, which covers exactly why an immediate rekey is the right call.
This distinction matters most if your keys were stolen alongside a wallet containing ID — or lost near your home address. As covered in the related article Stolen Keys vs Lost Keys: Why You Should Rekey Your Locks Straight Away, stolen keys carry a higher risk because the loss may not be accidental.
What Happens During a Same-Day Rekey in Perth?
Faster and simpler than most homeowners expect — no new hardware needed.
A locksmith removes your lock cylinder, replaces the internal key pins with a new set, and cuts a fresh key to match. The lock body, door hardware, and strike plate stay completely intact — you’re paying for a new key combination, not new equipment.
According to the step-by-step guide on How Lock Rekeying Works, a professional rekey typically takes around 20–30 minutes per lock. A locksmith can rekey every entry point on your home in a single visit and key them all to one new key if you prefer.
Ask your locksmith to test the old key in front of you before they leave. This confirms immediately that previous keyholders no longer have access — including former tenants, contractors, or whoever found your lost keys.
Which Locks Can a Perth Locksmith Rekey Without the Original Key?
Most standard residential locks are compatible — here's what to check.
Most Perth homes use pin tumbler locks — the standard cylinder type found on deadbolts and door knobs. These can be decoded and rekeyed without the original key in the vast majority of cases. Brands like Lockwood, Assa Abloy, and Schlage are routinely handled by licensed locksmiths across Perth.
High-security locks with restricted keyways — where key blanks are controlled and only available to licensed dealers — may require additional verification before a new key is cut. This is a security feature, not a barrier; it simply means the locksmith will confirm your identity before proceeding.
If your lock is corroded, stiff, or more than 10–15 years old, a locksmith may recommend full replacement rather than rekeying. Lost keys are often the trigger that reveals an ageing lock that was already due for an upgrade. The related article How Much Does It Cost to Replace Lost or Stolen House Keys in Perth? walks through what to expect financially for both options.
What to Do Immediately After Losing Your Keys in Perth
The steps you take in the first few hours matter most.
As the broader hub article Lost or Stolen Keys in Perth: What to Do Next and How to Secure Your Home Fast outlines, the priority order is clear: call a licensed locksmith the same day, decide on rekeying or replacement based on lock condition, and rekey every entry point that shares the lost key — not just the front door.
- •Front door — highest priority, rekey first
- •Back and side entry doors — equally critical, often overlooked
- •Garage entry into the home — a common secondary access point
- •Storage sheds or workshops if the same key was used
- •Deadbolts and separate security locks — each cylinder needs individual rekeying
The related article What to Do Immediately After Losing Your Keys in Perth covers the full action sequence in detail — including what to tell your locksmith when you call so they arrive prepared for a same-day rekey.
Your Questions About Key Replacement and Rekeying in Perth
Straight answers to what Perth homeowners ask most after losing their keys.
Can a locksmith make a key from just the lock itself?
Yes. A licensed locksmith can remove the cylinder, decode the existing pin configuration, and cut a working key from that information alone. No original key is required for this process on most standard residential locks.
Is it cheaper to get a new key cut or to rekey the lock?
Cutting a new key to an existing lock is generally the lower-cost option upfront. However, if keys are lost or stolen, rekeying is the only option that actually secures your home — cutting a new key without rekeying leaves previous keys still active.
How quickly can a Perth locksmith respond if I've lost my keys today?
Ultimate Locksmith Perth offers 24/7 emergency callout across Perth suburbs — call 0481 365 802 and a mobile locksmith will come to you. Same-day rekeying is available for most standard residential locks.
Do I need to replace all my locks or just the one for the lost key?
Rekey every lock the lost key operates — front door, back door, side entry, and garage access into the home. A partial rekey leaves gaps that a determined person will find. Your locksmith can assess the full set in a single visit.
Lost Your Keys? Let's Secure Your Home Today.
Call 0481 365 802 now for same-day rekeying across Perth — available 24/7. Don’t leave your home exposed overnight waiting to see if the keys turn up.
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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