Rekeying vs. Changing Locks: What's the Difference and Which One Do You Need?
When something changes in your home, business or rental property, one of the first security questions you may ask is:
Should I change the locks?
But changing the locks is not always the only option.
In many situations, a locksmith may recommend rekeying your existing locks instead.
For property owners throughout Niagara, understanding the difference between rekeying and replacing locks can help save time, avoid unnecessary expenses and ensure you choose the right solution for your security needs.
While the two services are often confused, they accomplish different things.
Rekeying changes which key operates your existing lock. Replacing a lock involves removing the current hardware and installing new hardware.
Both services can improve security, but the right choice depends on the condition of your locks, your reason for updating access and the type of property you own.
Whether you are a new homeowner in Niagara Falls, a landlord in Welland, a business owner in St. Catharines or a property manager elsewhere in the Niagara region, here is what you need to know about rekeying versus changing locks.
What Does It Mean to Rekey a Lock?
Rekeying changes the internal mechanism of an existing lock so that the old key no longer works.
The lock hardware remains on the door, but the internal configuration is adjusted to work with a new key.
This means you can maintain the appearance and functionality of your existing hardware while changing who has access.
After the rekeying process:
Old keys will no longer operate the lock
New keys will be issued
The exterior hardware generally remains the same
Access control is restored to the current property owner
Rekeying is a popular option because it can provide a fresh start without requiring complete lock replacement.
However, not every lock is a good candidate for rekeying.
The lock must be in suitable condition, and the hardware needs to be compatible with the service.
A professional locksmith can inspect your existing locks and determine whether rekeying is possible.
What Does It Mean to Change or Replace a Lock?
Changing a lock usually means replacing the existing hardware with a new lock.
The old lock is removed, and a new locking system is installed.
This may involve replacing:
The deadbolt
The door handle
The lock cylinder
The entire lockset
Additional security hardware
Replacing a lock is often the better option when the existing hardware is damaged, worn out or no longer meeting the property's security needs.
It may also be the right choice when a homeowner wants a completely different type of lock.
For example, someone may want to replace a traditional keyed deadbolt with a keyless entry system.
In this situation, rekeying would not accomplish the desired upgrade because the homeowner wants entirely new hardware and features.
The Biggest Difference: Access vs. Hardware
The simplest way to understand the difference is this:
Rekeying Changes Access
Rekeying is primarily about controlling who can use the lock.
The existing hardware remains in place, but old keys stop working.
Replacing Changes the Hardware
Changing the lock means installing something new.
This can improve security, update appearance or provide new features.
Both options can be valuable.
The question is whether your current lock is worth keeping.
When Should You Rekey Your Locks?
There are several common situations where rekeying may make sense.
1. You Just Bought a New Home
Buying a home means receiving keys from the previous owner.
But how many copies of those keys exist?
You may never know.
Previous owners may have given keys to:
Family members
Friends
Neighbours
Contractors
Cleaners
Dog walkers
Babysitters
Some keys may have been copied years ago and forgotten.
Rekeying allows new homeowners to start fresh without necessarily replacing every lock on the property.
If the locks are in good condition, rekeying can restore control over access while allowing you to keep the existing hardware.
2. Your Keys Have Been Lost
Losing a key can create uncertainty.
You may eventually find it, but there is always the possibility that someone else could find it first.
If the lost key can be connected to your home or business, the security concern may be even greater.
Rekeying the lock makes the lost key useless.
This can provide peace of mind without requiring a complete lock replacement.
Of course, the best solution depends on the situation.
If the lock is already old or damaged, replacement may be worth considering at the same time.
3. You Don't Know Who Still Has a Copy
Over time, keys tend to multiply.
A homeowner may have lived in a property for years and given spare keys to several people.
Eventually, circumstances change.
The neighbour moves away.
The babysitter is no longer needed.
A contractor finishes a renovation.
A tenant moves out.
But the keys may still be out there.
If you no longer know exactly who has access to your property, rekeying can give you a clean slate.
4. A Tenant Has Moved Out
Landlords and property managers need to pay particular attention to key control.
When a tenant moves out, there may be several copies of keys in circulation.
The tenant may have:
Made additional copies
Given a key to family members
Given access to roommates
Lost a key without reporting it
Rekeying between tenancies can help property owners regain control before new occupants move in.
It is also an opportunity to inspect the overall condition of the locks.
If the hardware is damaged or excessively worn, replacement may be the better choice.
5. An Employee Has Left Your Business
Businesses face similar concerns when employee access changes.
A former employee may still have a key to:
The main entrance
An office
A storage room
A supply area
A warehouse
Another restricted space
Instead of replacing every lock, a commercial locksmith may be able to rekey the appropriate locks.
This allows the business to remove access associated with old keys while maintaining existing hardware.
For businesses with multiple access levels, this may also be a good time to review whether a master key system would improve key management.
6. You Want to Simplify Your Keys
Some properties have several exterior doors, each requiring a different key.
Over time, your keychain can become unnecessarily complicated.
Depending on the type and compatibility of your locks, rekeying may allow multiple locks to operate with one key.
This could potentially simplify access to:
Front doors
Back doors
Side entrances
Garage entry doors
A locksmith can inspect your locks and explain whether this type of key system is possible for your property.
When Should You Replace Your Locks?
Rekeying is useful, but it cannot solve every lock problem.
Sometimes replacement is clearly the better choice.
1. Your Lock Is Damaged
Physical damage can affect both security and performance.
You may notice:
Cracked hardware
Bent components
A damaged keyway
A broken deadbolt
Missing pieces
Signs of tampering
If the lock has significant damage, replacing it may provide a more reliable long-term solution.
2. Your Lock Is Constantly Sticking
A lock that occasionally sticks may be repairable.
However, a lock that regularly gives you trouble could be reaching the end of its useful life.
You may experience:
Keys that repeatedly get stuck
Difficulty turning the key
A deadbolt that will not extend fully
Internal grinding noises
A lock that only works at certain angles
Rekeying changes access, but it does not repair worn or damaged mechanical components.
If the lock itself is failing, repair or replacement may be necessary.
3. You Want Better Security
Sometimes homeowners simply want to upgrade.
You may have an older lock that technically works but does not provide the level of security you want.
Upgrading may give you access to:
Stronger deadbolts
Improved locking mechanisms
More durable hardware
Keyless entry options
Electronic locks
A locksmith can help you select hardware appropriate for your door and security needs.
4. You Want Keyless Entry
If you are tired of carrying keys, forgetting keys or coordinating spare keys with family members, keyless entry may be worth considering.
Electronic locks can offer features such as:
Keypad access
Personal access codes
Temporary codes
Multiple user access
Key-free convenience
Because keyless entry systems use different hardware, replacing the existing lock is generally necessary.
This type of upgrade can be particularly convenient for busy families, rental properties and businesses.
5. The Lock Is Very Old
Older locks can sometimes be repaired or rekeyed successfully.
However, age and condition matter.
If your lock is decades old, heavily worn or difficult to service, replacing it may be more practical.
Older hardware may also lack features available with modern locks.
A locksmith can help you determine whether maintaining the existing hardware makes sense or whether an upgrade would be a better investment.
Rekeying vs. Replacing Locks: A Quick Comparison
Situation | Rekeying | Replacing |
Old keys are unaccounted for | Excellent option | Possible |
You just bought a home | Often appropriate | Depends on lock condition |
Lost keys | Often appropriate | Depends on situation |
Lock is damaged | Not always suitable | Often recommended |
Lock is worn out | Not a solution | Often recommended |
You want better security features | Limited | Best option |
You want keyless entry | Not applicable | Required |
Employee turnover | Often appropriate | Depends on business needs |
Tenant turnover | Often appropriate | Depends on condition |
You want new hardware appearance | No | Yes |
Can You Rekey Every Type of Lock?
Not necessarily.
Some locks are designed to be rekeyed, while others may not be suitable.
The age, brand, design and condition of the hardware can all affect whether rekeying is possible.
That is why it is helpful to have a professional locksmith inspect the lock.
Trying to determine compatibility without experience can be difficult.
A locksmith can assess:
The type of lock
Its condition
Whether internal components are worn
Whether rekeying is possible
Whether replacement would provide better value
The goal should be to choose the solution that makes sense for your specific property—not automatically replace hardware that may still be perfectly functional.
What About Rekeying Only Some Locks?
You do not necessarily have to treat every lock in your home or business the same way.
For example, you may have:
A front door with a modern deadbolt
A side door with older hardware
A patio door with a damaged lock
A garage entry door with a different key system
A locksmith may recommend rekeying one lock, repairing another and replacing a third.
Security solutions should be based on the condition and purpose of each entry point.
There is no requirement for every door to receive the same service.
The Importance of Professional Locksmith Service
Lock hardware can appear simple from the outside, but the internal mechanisms are precise.
Attempting to rekey or replace locks without the proper tools and knowledge can create additional problems.
Incorrect installation can result in:
A lock that does not align correctly
A deadbolt that sticks
Damage to the door
Reduced security
Premature wear
A professional locksmith can assess the situation, recommend the appropriate solution and ensure the lock operates correctly after the work is completed.
This is particularly important for exterior doors, where reliable security is essential.
Residential Rekeying for Niagara Homeowners
Homeowners often choose to rekey locks after major life changes.
Common reasons include:
Purchasing a home
Moving into a previously owned property
Losing keys
Completing renovations
Changes in household access
Concerns about old key copies
Rekeying can be a practical way to regain control without replacing hardware that is still in good condition.
Kevin's Mobile Locksmith provides mobile residential locksmith services throughout the Niagara region, helping homeowners address lock and key concerns at their property.
Commercial Rekeying for Niagara Businesses
Businesses also benefit from rekeying services.
Employee turnover can make key management difficult.
Over time, multiple people may have been given access to the property.
Rekeying can help business owners restore control over keys after:
Employees leave
Management changes
Tenant changes
Lost keys
Security concerns
For larger properties, a locksmith may also recommend reviewing access systems and master key arrangements.
A well-organized key system can make it easier for businesses to manage access while reducing unnecessary keys.
How Often Should You Rekey Your Locks?
There is no single schedule that works for every property.
Instead, rekeying should generally be considered after changes in access.
You may want to rekey after:
Buying a property
Losing a key
Employee turnover
Tenant turnover
A relationship change
Major renovations involving contractors
Uncertainty about who has keys
The most important question is simple:
Do you still know who has access to your property?
If the answer is no, rekeying may be worth considering.
Questions to Ask Before Choosing Rekeying or Replacement
Before contacting a locksmith, think about your goals.
Ask yourself:
Are My Locks Working Properly?
If yes, rekeying may be possible.
Do I Simply Want Old Keys to Stop Working?
Rekeying may be the ideal solution.
Is My Lock Damaged or Worn?
Repair or replacement may be necessary.
Do I Want New Features?
Replacement is likely required.
Am I Happy With the Current Hardware?
If you dislike the appearance or functionality, replacing it may make sense.
How Many People Currently Have Keys?
If you are unsure, rekeying can provide a fresh start.
Rekey Locks in Niagara With Kevin's Mobile Locksmith: Rekeying vs. Changing Locks: What's the Difference and Which One Do You Need?
Choosing between rekeying and changing locks does not have to be complicated.
The right decision depends on the condition of your existing locks and what you want to accomplish.
If your locks are in good condition and you simply want to make old keys unusable, rekeying may be the practical solution.
If your locks are damaged, outdated or no longer meeting your security needs, replacement may be the better investment.
For homeowners, landlords, property managers and businesses throughout Niagara Falls, St. Catharines, Welland, Port Colborne, Fonthill and surrounding communities, Kevin's Mobile Locksmith provides professional mobile locksmith services.
Services can include:
Lock rekeying
Lock repair
Lock replacement
New lock installation
Residential locksmith services
Commercial locksmith services
Keyless entry options
Deadbolt installation
You do not have to guess which solution is right for your property.
A professional locksmith can inspect your existing locks and help you make an informed decision.
Whether you need to rekey your locks, repair damaged hardware or completely upgrade your security, Kevin's Mobile Locksmith can help you take control of access to your Niagara property.
Contact Kevin's Mobile Locksmith to discuss your lock and security needs and find the solution that works best for your home or business.
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