Rekeying vs Replacing Your Locks: Which Option Is Right for You?

If you have lost your keys, moved into a new property, changed tenants or found an old lock that no longer works well, you may be wondering whether to re-key your locks or replace them completely. Both options can improve security, but they solve different problems.

Re-keying changes the key that operates an existing lock. Lock replacement changes the lock hardware itself. The right choice depends on the condition of the lock, your security needs, your budget and whether the current lock is suitable for the door.

Eastern Suburbs Locksmiths provides re-keying, lock replacement, key cutting and mobile locksmith services across Sydney’s Eastern Suburbs. Based in Bondi Junction and serving the local community since 1958, the team can assess your locks and explain your options before work begins.

Need help deciding? Call Eastern Suburbs Locksmiths on (02) 9389 5266 or visit the workshop at 115 Bronte Rd, Bondi Junction NSW 2022.

Re-keying vs replacing locks: the quick answer

In many situations, re-keying is the simpler and more cost-effective option. It lets you keep the same lock while changing which keys work it. This is often useful when the lock is still in good condition, but you no longer want old keys to provide access.

Replacing a lock is usually better when the lock is damaged, worn, unsuitable, outdated or no longer offers the level of security you want. It may also be the right choice if you want a different style of lock or if the existing lock cannot be re-keyed.

Option What changes? When it suits Re-keying The internal pins or mechanism are changed so new keys work and old keys no longer do. Moving in, lost keys, tenant changes, staff changes, or stopping old keys from working. Lock replacement The lock hardware is removed and replaced with another lock. Damaged locks, worn locks, poor-quality hardware, security upgrades or locks that cannot be re-keyed.

What is re-keying?

Re-keying is a locksmith process that changes how an existing lock responds to keys. The lock stays in place, but its internal configuration is altered so a new key operates it. The previous key should no longer work once the re-key is complete.

This is why re-keying is often described as a way to change your keys without having to change your locks. It can be a practical choice when the current lock is secure, functional and suitable for the door.

Re-keying may be suitable for:

• Homes where the current locks work well but old keys may still be in circulation.
• Rental properties after a tenant has moved out.
• Businesses after staff changes or misplaced keys.
• Strata buildings where access needs to be controlled after occupancy changes.
• Properties where keys have been lost, stolen or not returned.

Because the existing lock hardware can often remain in place, re-keying is commonly a cost-saving alternative to full lock replacement. However, it is not always possible or appropriate. A locksmith will need to check the lock type, condition and your security needs.

For more information, see our re-keying services.

What does replacing a lock involve?

Lock replacement means removing the current lock hardware and fitting another lock. This may be a similar replacement or a more suitable lock for the door, depending on the situation.

Replacing a lock may be the better option when the hardware itself is the problem. A re-key will not fix a lock that is badly worn, damaged, poorly fitted or not secure enough for your needs.

Lock replacement may be appropriate when:

• The lock is damaged after a break-in attempt or forced entry.
• The key is difficult to turn because the lock is worn or faulty.
• The lock no longer closes, latches or secures the door correctly.
• You want to upgrade from an older or lower-security lock.
• The existing lock type is unsuitable for the door or property.
• The lock cannot be re-keyed due to its design or condition.

If you are unsure whether the issue is with the key, the lock, the door alignment or the hardware, it is worth having a locksmith inspect it. This can help you avoid replacing locks unnecessarily.

For planned upgrades or faulty lock hardware, visit our lock replacement page.

Cost differences between re-keying and lock replacement

Re-keying is often more affordable than replacing a lock because the lock body and door hardware can usually stay in place. You are mainly paying for the locksmith’s time, the re-keying work and the new keys.

Lock replacement usually costs more because it may include new hardware, fitting, adjustment and additional work to ensure the door locks properly. The final cost can vary depending on the lock type, door condition, security level and whether the work is urgent or after hours.

Eastern Suburbs Locksmiths does not publish fixed pricing here because each job can differ. The business states that pricing is transparent and that the full cost is disclosed before work begins. No work is completed before your approval.

What affects the cost?

• Number of locks: Re-keying or replacing several locks will take more time than one lock.
• Lock type: Different locks have different parts, keyways and re-keying requirements.
• Condition of the hardware: Worn or damaged locks may need replacement rather than re-keying.
• Keys required: Extra keys, restricted keys or unusual key types may affect the job.
• Urgency: Emergency and after-hours work may differ from planned daytime work.
• Mobile attendance: On-site work may differ from in-store key cutting or workshop services.

For an accurate recommendation, call (02) 9389 5266 and explain your lock, key or property situation.

Security benefits of re-keying your locks

Re-keying is mainly about controlling who has access. If you do not know how many copies of a key exist, re-keying can give you a fresh start without changing the lock hardware.

This is especially useful when you move into a new property. Previous owners, tenants, cleaners, tradespeople, neighbours or agents may have held keys at some point. Re-keying helps ensure that only the new keys issued to you will operate the lock.

Security benefits of re-keying include:

• Old keys no longer operate the lock.
• You can issue new keys only to authorised people.
• You may avoid unnecessary lock replacement if the hardware is still sound.
• It can support access control after staff, tenant or occupant changes.
• It can be arranged for homes, businesses and strata settings, where suitable.

Re-keying does not make a lock stronger if the hardware itself is weak, damaged or outdated. If the lock is not suitable for your security needs, replacement may be the better choice.

Security benefits of replacing your locks

Replacing a lock can improve security when the current hardware is the weak point. A new lock may provide better operation, better suitability for the door and a more appropriate security level for your property.

Lock replacement can also help when older locks are difficult to use. A lock that sticks, jams or requires force to operate can become a daily frustration. It may also fail when you need it most.

Security benefits of replacing locks include:

• Faulty or worn hardware can be removed.
• The lock can be matched to the door and property use.
• You can upgrade from an old or poor-quality lock.
• Damaged locks can be replaced after an incident.
• Door security can be reviewed as part of a broader lock assessment.

No lock should be described as unbreakable or burglary-proof. Good lock selection is about reducing risk, improving everyday security and choosing hardware that suits the door, property and access needs.

When should you re-key your locks?

1. You have moved into a new property

Moving into a new home or apartment is one of the most common reasons to re-key locks. Even if the keys were handed over properly, you may not know whether spare keys were copied in the past.

Re-keying gives you control over the keys from day one. It is a practical step for homeowners, tenants and owner-occupiers who want peace of mind after moving in.

2. You have lost your keys

If keys are lost and you cannot be sure where they are, re-keying may be enough to stop those keys from working. This can be a sensible option when the lock itself is still in good condition.

If the lost keys include building keys, restricted keys or commercial keys, call a locksmith to discuss the situation. Authorisation may be required for certain key types.

3. A tenant has moved out

For landlords, property managers and strata managers, re-keying after a tenant change can help keep access controlled. It may prevent old keys from being used by previous occupants or anyone who received a copy.

Re-keying is often more practical than replacing all suitable locks, especially across multiple doors or repeated tenancy changes.

4. Staff or contractors have changed

Businesses can use re-keying to manage access after staff leave, contractors change or keys are not returned. This is particularly useful for offices, shops and commercial premises where access control matters.

For more complex access needs, a restricted master key system may be worth discussing. See our master key systems page for more information.

5. You want one key to work several locks

In some cases, locks can be keyed alike so one key operates multiple suitable locks. This can reduce the number of keys you carry and make everyday access easier.

This depends on the lock types and keyways, so a locksmith will need to inspect the locks before confirming what is possible.

When should you replace your locks instead?

1. The lock is old, worn or unreliable

If your key sticks, the lock is loose, or the cylinder feels rough, the lock may be worn. Re-keying changes the keying of the lock, but it may not solve a mechanical fault.

Replacing the lock can be the better long-term option when the hardware is near the end of its useful life.

2. The lock is damaged

A damaged lock should be assessed carefully. Damage may come from weather, age, forced entry, impact or a key breaking inside the lock.

If the lock cannot operate safely and smoothly, replacement may be recommended. If the issue is minor, servicing or re-keying may still be possible.

3. You want to upgrade security

If your current lock is basic, outdated or not suitable for the door, replacing it may offer better security than re-keying. This is common in older homes, commercial premises and shared buildings where access needs have changed.

For older homes in the Eastern Suburbs, a lock review can help identify whether re-keying, replacement, window locks or other hardware should be considered. You may also find our article on improving security in an older Eastern Suburbs home useful.

4. The lock cannot be re-keyed

Not every lock can be re-keyed. Some lock types, worn cylinders or unusual hardware may not allow a practical re-key. If that is the case, replacement may be the only suitable option.

5. The door or lock is not functioning correctly

Sometimes the lock is not the only issue. A door may be misaligned, a hinge may be affecting the fit, or a door closer may stop the door from shutting properly. In these cases, a locksmith can assess the lock and related door hardware before advising on the next step.

Re-keying and lock replacement for homes

For residential properties, re-keying is often chosen after moving in, losing keys or wanting to stop old keys from working. It can be a simple way to improve access control without changing every suitable lock.

Lock replacement may be better when the lock is worn, damaged, unreliable or no longer suitable for the door. It may also be useful when you want to improve security in an older home or replace mismatched hardware.

Eastern Suburbs Locksmiths assists homeowners, tenants and occupants across Sydney’s Eastern Suburbs with residential re-keying, lock replacement, key cutting, home lockouts and window locks. Visit our residential locksmith page for more details.

Re-keying and lock replacement for businesses

Commercial properties often need clear control over who can access the premises. Re-keying may be suitable after a staff change, lost keys, contractor changes or a tenancy handover.

Replacing locks may be needed when commercial hardware is worn, damaged or not suitable for the level of use. Businesses may also need commercial-grade locks, restricted keys or a restricted master key system to manage access across different areas.

Eastern Suburbs Locksmiths supplies, fits, re-keys and services a wide range of commercial locks, including Abloy and Bilock key systems. For business premises, see our commercial locksmith services.

Re-keying and lock replacement for strata properties

Strata buildings have changing access needs because residents, tenants, owners, tradespeople and building managers may all require keys at different times. Re-keying can be useful after tenant changes, lost building keys or changes in authorised access.

Lock replacement may be needed for damaged common-area locks, apartment doors, garage door locks or building access hardware. Some keys and fobs may require authorisation before they can be copied or supplied.

Eastern Suburbs Locksmiths supports strata managers, building managers, tenants and owner-occupiers with re-keying, key cutting, lockouts and listed strata hardware items. Learn more about our strata locksmith services.

What if you are locked out?

If you are locked out of your home, apartment or business, avoid trying to force the door or tamper with the lock. This can damage the hardware and may make the job more complex.

A locksmith can help you regain access with minimum fuss, then advise whether re-keying or replacement is needed. In some cases, you may simply need access restored. In others, lost or stolen keys may make re-keying a sensible next step.

Eastern Suburbs Locksmiths offers 24/7 mobile locksmith support across Sydney’s Eastern Suburbs. For urgent help, call (02) 9389 5266. You can also visit our emergency locksmith, after-hours locksmith or home lockouts pages.

Can you cut new keys after re-keying?

Yes, new keys are usually supplied as part of a re-keying job. Extra keys can also be cut where suitable. Eastern Suburbs Locksmiths provides key cutting in store at Bondi Junction and on site with a mobile locksmith workshop.

The business states that key cutting is backed by a 100% guarantee and that keys that do not work will be replaced. Some key types, including restricted keys, may require authorisation. Not all keys can necessarily be copied, so it is best to call first if you are unsure.

Need spare keys, replacement keys or a restricted key checked? See our key cutting service or call (02) 9389 5266.

How to decide between re-keying and replacing your locks

If you are unsure which option is right, use the questions below as a simple guide.

Choose re-keying if:

• The lock works smoothly and is in good condition.
• You want old keys to stop working.
• You have moved into a new home, apartment or commercial premises.
• A tenant, staff member or contractor has left.
• You have lost keys, but the lock itself is still suitable.
• You want a cost-effective option where replacement is not needed.

Choose lock replacement if:

• The lock is worn, damaged, loose or unreliable.
• The key is hard to turn or the lock often jams.
• The existing lock is not suitable for the door.
• You want to upgrade old or low-quality hardware.
• The lock has been damaged after an incident.
• A locksmith confirms the lock cannot be re-keyed.

In some cases, the answer may be a mix of both. For example, you may replace one damaged front door lock and re-key other suitable locks to match new keys. A locksmith can inspect the locks and recommend a practical approach.

Why ask a local locksmith before deciding?

It is not always obvious whether a lock needs re-keying, servicing or replacement. A lock may feel faulty because of worn keys, internal wear, door movement, alignment issues or damaged hardware.

A local locksmith can inspect the lock, explain what is possible and help you avoid unnecessary work. Eastern Suburbs Locksmiths operates from a Bondi Junction shop and workshop, supported by a fully equipped mobile locksmith fleet for on-site work across Sydney’s Eastern Suburbs.

You’re in safe hands with Eastern Suburbs Locksmiths. The team can help with residential, commercial, strata, emergency and after-hours locksmith needs, including re-keying, lock replacement and key cutting.

Frequently asked questions about re-keying vs replacing locks

Is re-keying cheaper than replacing a lock?

Re-keying is often more cost-effective because the existing lock hardware can usually stay in place. Lock replacement usually costs more because it involves new hardware and fitting. The actual cost depends on the lock type, number of locks, condition and job details.

Does re-keying make my lock more secure?

Re-keying improves access control because old keys no longer work. It does not make weak or damaged hardware stronger. If the lock itself is not secure enough, replacement may be a better option.

Should I re-key after moving into a new property?

Yes, re-keying is commonly recommended after moving into a new property. It helps ensure previous keys no longer operate the lock, provided the existing lock is suitable for re-keying.

Should landlords re-key locks after tenant changes?

Re-keying can be a practical option after tenant changes because it helps control who has access. It may be more cost-effective than replacing all suitable locks. Strata or tenancy requirements can vary, so managers should follow their own approval process.

Can a locksmith re-key a lock if I do not have the original key?

In some cases, a locksmith may be able to re-key or create a key from a lock, but this depends on the lock type and situation. Call Eastern Suburbs Locksmiths to discuss the lock and what may be possible.

When is lock replacement unavoidable?

Replacement may be needed if the lock is damaged, badly worn, unsuitable, or cannot be re-keyed. It may also be recommended when you want to upgrade old hardware.

Can multiple locks be changed to use one key?

Sometimes, yes. Suitable locks can often be keyed alike, allowing one key to operate several locks. This depends on the lock types and keyways, so an inspection may be needed.

Do you provide re-keying after hours?

Eastern Suburbs Locksmiths provides 24/7 mobile locksmith support. If you need urgent re-keying or help after hours, call (02) 9389 5266.

Speak to Eastern Suburbs Locksmiths

Re-keying and lock replacement both have their place. Re-keying is often ideal when the lock is in good condition but you need new keys. Replacing a lock is usually better when the hardware is damaged, worn, unsuitable or ready for an upgrade.

If you are not sure which option is right, Eastern Suburbs Locksmiths can help you make a practical decision. The team services homes, businesses and strata buildings across Sydney’s Eastern Suburbs, with a Bondi Junction workshop and 24/7 mobile locksmith workshops available.

Call our locksmiths on (02) 9389 5266 or visit Contact to send an enquiry. For planned work, you can also visit the shop at 115 Bronte Rd, Bondi Junction NSW 2022 during shop trading hours.