Rekeying vs Replacing Locks: What Costs Less in Perth?
- •Rekeying changes internal lock pins so old keys stop working — without touching the hardware.
- •Replacement is right when locks are damaged, corroded, or a low security grade.
- •Rekeying is generally the cheaper option when your lock body is in good condition.
- •Lost keys, a tenancy change, or moving home all trigger an immediate decision.
- •After-hours callouts cost more — act quickly but schedule non-urgent work during business hours.
You’ve just moved into a new Perth home, lost your keys, or ended a tenancy — and now you’re wondering which option is actually cheaper. Most homeowners either overspend on full replacements they didn’t need, or under-protect with a rekey when the lock was already compromised. Getting this decision right saves you money and secures your home in one move.
What Is the Real Difference Between Rekeying and Replacing?
Two different problems — one about key control, one about hardware condition.
Rekeying changes the internal pin configuration of your existing lock cylinder. Your old keys stop working permanently, new keys are cut to the new configuration, and the lock hardware stays exactly where it is on the door.
Replacing the lock means removing the entire lock assembly and fitting a new unit. This is the right move when the hardware itself is the problem — not just who holds the keys. These are two distinct problems requiring two distinct solutions.
Rekeying addresses key control — who can get in. Replacement addresses hardware condition and security grade — how hard it is to get in by force. Mixing these up is how homeowners overspend or under-protect.
When Does Rekeying Cost Less and Still Do the Job?
The smart choice when your lock works well and the hardware is sound.
Rekeying is generally less expensive than full replacement because you’re paying for labour and new pins rather than new hardware. If your lock operates smoothly with no corrosion or damage, rekeying achieves the same security outcome at a lower cost.
The most common triggers are buying a new home, a tenancy changeover, or lost keys. When you move in, previous owners, contractors, and real estate agents may all hold copies — rekeying eliminates that uncertainty immediately. Our full range of locksmith services includes same-day rekeying across Perth suburbs.
Rekeying also lets a locksmith key multiple locks to one key during a single visit — front door, back door, and garage all on one key — without replacing any hardware. That’s a practical win most homeowners don’t realise is possible.
When Should You Replace the Lock Entirely Instead?
Some situations call for new hardware — a rekey won't fix these.
If your lock is stiff, sticky, or jams on the key, that’s a mechanical failure in progress — not a rekeying problem. The same applies to any lock showing visible rust, a cracked body, or a warped strike plate. Perth’s coastal climate accelerates corrosion on exterior hardware, and surface rust often signals deeper damage inside.
After a break-in or forced entry attempt, replacement is usually the safer call. A lock that was tampered with may have internal damage that rekeying won’t fix — and a compromised lock gives false confidence.
Outdated lock types are another trigger. If your exterior doors still rely on basic knob locks as primary security, no amount of rekeying upgrades the security grade — you need a deadbolt fitted. A locksmith can assess whether your current locks meet today’s residential standards.
If your lock is aged or damaged and you’re already paying for a callout, replace it during the same visit. Combining the job costs less than two separate callouts — and closes the security gap in one step.
Does Lock Age Change Which Option Is Cheaper?
Older locks can narrow the cost gap between rekeying and replacing.
Locks older than 10–15 years may look fine externally, but the internals tell a different story. Even a lock that turns smoothly can have critically worn pins and springs that no longer engage with full resistance.
Older locks also predate improvements in pick resistance, bump-key protection, and drill resistance that modern locks include as standard. As the hardware ages, the cost difference between rekeying and replacing narrows — and the security uplift from replacement becomes significant.
Ask your locksmith to assess the cylinder condition before defaulting to a rekey on ageing hardware. A quick inspection on-site takes minutes and gives you the information you need to make the right call.
How Does Timing Affect the Total Cost of Either Option?
When you call matters almost as much as what needs doing.
Weekend and after-hours callouts cost more than standard weekday business-hours jobs — this is consistent across the Perth locksmith industry. It reflects the real cost of keeping a licensed mobile locksmith available around the clock, and applies to both rekeying and replacement jobs.
If your situation isn’t urgent — for example, you’ve moved in and want to rekey as a precaution — scheduling during business hours is the lower-cost option. If you’ve lost keys or suspect a security risk, act immediately regardless of the time. Ultimate Lock is available 24 hours a day, 7 days a week by calling 0481 365 802.
For broader home security tips that complement your lock upgrade, it’s worth reviewing what else may need attention beyond the locks themselves.
Rekeying vs Replacing: Your Questions Answered
Straight answers to what Perth homeowners ask most often.
Is rekeying always cheaper than replacing a lock?
Rekeying is generally less expensive because you’re paying for labour and new pins rather than new hardware. However, if the lock is damaged, corroded, or a low-security grade, replacement delivers better value — spending less on a rekey that doesn’t solve the real problem costs more in the long run.
Can I rekey my locks myself to save money?
Rekeying requires brand-specific tools — a plug follower, key decoder, and correctly sized replacement pins. Attempting it without the right kit risks losing pins inside the cylinder or damaging the plug, leaving you with a non-functioning lock. A professional rekey typically takes well under an hour per lock and is far cheaper than fixing a DIY mistake.
What should I do first after moving into a new Perth home — rekey or replace?
If the locks are in good mechanical condition, rekeying is the faster and cheaper first step — it immediately cancels access for previous owners, contractors, and real estate agents. If any lock is visibly corroded, stiff, or a low-security type like a basic knob lock, replace it at the same time.
How quickly can Ultimate Lock rekey my locks in Perth?
Ultimate Lock operates 24 hours a day, 7 days a week across Perth suburbs — including Sundays and public holidays. A licensed locksmith can typically rekey most standard residential locks in a single visit. Call 0481 365 802 to arrange same-day service.
Ready to Secure Your Perth Home Today?
Whether you need a same-day rekey or a full lock upgrade, Ultimate Lock is available 24/7 across Perth — call 0481 365 802 or get in touch for a transparent upfront quote.