Lock rekeying vs replacement: secure the right choice

Choosing between lock rekeying and lock replacement is a decision every property owner may face at some stage. Whether the issue arises from lost keys, a change of tenants, or concerns about a break-in, knowing which option provides the right balance of cost, security, and convenience is essential.

At Page Security, a family-run locksmith and security company with over 15 years of experience serving London and the South East, we specialise in both rekeying and full lock replacement. With our rapid 15–30 minute emergency response times and a guarantee on all our work, we are committed to giving customers clear advice and reliable solutions for their individual circumstances.

Key Takeaways

Rekeying changes the internal mechanism of an existing lock so old keys no longer work, keeping the hardware.
Replacement replaces the entire lock, often upgrading to stronger, BS3261 insurance-approved security.
Rekeying tends to be quicker, more economical and less disruptive.
Replacement offers greater long-term protection, especially if locks are worn, damaged or insurance demands stronger compliance.
A good decision depends on locked hardware condition, insurance requirements, budget, and whether you need short- or long-term security.

Did you know? Upgrading to a BS3261 lock can be a requirement for many insurance policies in the UK.

What is Lock Rekeying?

Lock rekeying is the process of changing the internal mechanism of an existing lock so that old keys no longer work and a new key is required. The hardware remains in place, but the pins inside the cylinder are altered.

How Rekeying Works

The locksmith removes the lock cylinder.
Internal pins are replaced or rearranged.
A new key is cut to match the new configuration.
The lock is reassembled and tested.

Benefits of Rekeying

Quick and efficient process.
Retains existing lock hardware if it is in good condition.
Provides immediate control by ensuring old keys are invalid.

Rekeying is particularly effective for households or businesses wanting peace of mind without the cost of replacing the full lock mechanism. It is often chosen when moving into a new property or when keys have been misplaced but the lock itself is still in working order.

What is Lock Replacement?

Lock replacement involves removing the entire lock mechanism and fitting a new one. This could be a like-for-like replacement, an upgrade to a more secure lock, or a completely different system such as a master key setup or access control system.

When Replacement is Necessary

When locks are worn, broken, or corroded.
After a burglary or attempted break-in.
When upgrading to insurance-approved locks such as BS3261 standard models.
If a customer wants additional features or a different style of lock.

Page Security also offers burglary repair services, including frame replacement and reinforcement products to restore both security and peace of mind. Replacement is often seen as a long-term investment because it not only secures the property but also allows for modern features that rekeying cannot provide.

Pros and Cons: Rekeying

Pros

Lower cost than full lock replacement.
Fast turnaround with minimal disruption.
Reuses existing lock hardware, reducing waste.
More environmentally friendly as parts are reused.

Cons

Cannot upgrade the strength of the existing hardware.
If the lock itself is worn or faulty, rekeying offers no improvement.
May not meet insurance requirements if the existing lock does not already comply.

Pros and Cons: Replacement

Pros

Allows upgrades to modern, high-security or BS3261 insurance-approved locks.
Resolves issues caused by age, wear, or damage.
Enhances insurance compliance and improves overall security.
Peace of mind with new hardware and reinforced fittings where required.

Cons

Higher cost due to new parts and fitting.
Takes longer than rekeying and may involve minor adjustments to the door.
Generates more waste from old hardware.

Key Factors to Consider When Deciding

Security Needs

If you live in a high-risk area or have experienced a break-in, replacement may be the most secure choice. For lower-risk scenarios, rekeying can provide adequate reassurance.

Condition of Existing Locks

Rekeying only works if the current lock is in good condition. A lock that sticks, jams, or shows signs of corrosion is better replaced.

Cost Considerations

Rekeying is generally the more affordable option, but replacement may be a smarter investment if it prevents further problems down the line.

Insurance Requirements

Many insurers require locks that meet BS3261 standards. If your current locks do not comply, replacement will be necessary.

Functionality and Convenience

If you want to move towards a master key system, smart lock, or enhanced features, replacement is the route to take.

Long-Term vs Short-Term Thinking

Rekeying can be a temporary measure if you plan to upgrade later. Replacement is the best choice if you are looking for a long-lasting solution.

Typical Scenarios

Tenant or staff change: Rekeying is the most practical solution to prevent previous occupants from gaining access.
Broken lock: Replacement is essential when the lock is damaged or beyond repair.
Insurance upgrade: Replacement with a BS3261-approved lock ensures compliance.
After burglary: Replacement combined with reinforcement of the frame is often the most secure route.

By examining these scenarios, property owners can clearly see that rekeying is a good short-term and cost-conscious solution, while replacement becomes unavoidable when security or condition issues demand it.

Cost Considerations

While exact figures vary depending on the type of lock, urgency, and door construction, the following table outlines the general relationship between the two options:

Factor	Rekeying	Replacement
Hardware cost	None (existing lock retained)	New lock purchased
Labour time	Lower	Higher
Disruption	Minimal	May involve adjustments to door
Environmental impact	Lower (reuse of hardware)	Higher (new materials)
Long-term value	Limited if lock is old	High, with newer and more secure locks

Page Security provides transparent pricing and ensures customers understand their options before proceeding. We focus on making sure every client has the correct balance between cost and long-term protection.

When Rekeying is the Right Choice

The lock is in good condition.
Keys have been lost or not returned by former occupants.
The customer needs a fast, affordable solution.
The situation calls for a short-term fix before planning a full upgrade.

Rekeying is particularly helpful for landlords, letting agents, and businesses that regularly change occupants or staff. It is also a practical step for homeowners who want peace of mind after lending keys to tradespeople or neighbours.

When Replacement is the Better Option

Locks are old, faulty, or visibly worn.
There has been a burglary or attempted forced entry.
Insurance requires BS3261 locks.
The property owner wants to invest in stronger long-term protection.

Replacement offers more than just a change of key—it provides the opportunity to upgrade to advanced lock technology, reinforce frames, and improve access control. For many property owners, this is the option that delivers the greatest peace of mind.

How Page Security Can Help

At Page Security, we provide:

24/7 emergency locksmith services with a rapid 15–30 minute response time.
Lock repairs, replacements, and upgrades to BS3261 insurance-approved standards.
Burglary repairs, including door frame reinforcement and replacement.
Master key systems, UPVC lock services, and access control systems.
A family-run service where all work is guaranteed.

We operate across London and the South East, ensuring homeowners and businesses alike have quick access to reliable locksmith services whenever needed. With over 15 years of experience, our team delivers professional service, honest advice, and solutions tailored to your needs.

Step-by-Step Guide to Making the Decision

Inspect the current lock and assess its condition.
Check whether it meets your insurer’s requirements.
Compare the pros and cons of rekeying versus replacement.
Consider long-term needs, such as future upgrades.
Factor in how much disruption you can accommodate.
Contact Page Security for professional inspection and advice.

By following these steps, property owners can make a well-informed choice that balances cost, convenience, and long-term security.

Conclusion: Lock rekeying vs Replacement

Rekeying and lock replacement each offer valuable benefits. Rekeying is often the fastest and most cost-effective way to regain control over access, while replacement provides the strongest long-term solution, especially if the locks are worn or insurance requires an upgrade.

At Page Security, we are here to help you make the best decision for your property. With over 15 years of experience, a 24/7 emergency service, and all work guaranteed, you can rely on us for expert locksmith advice and professional service.

Contact us today for a free inspection and expert advice so you can choose the lock solution that truly protects your home or business.

Frequently Asked Questions

Can all locks be rekeyed?

Not every lock can be rekeyed. Rekeying is suitable for many cylinder locks, but if the lock is worn, broken, or not designed for rekeying, a full replacement will be required.

How long does rekeying or replacement usually take?

Both are relatively quick processes. Rekeying tends to be faster, while replacement can take longer if new hardware or adjustments to the door are needed.

Will rekeying keep my insurance valid?

If your current lock already complies with BS3261 standards, rekeying should not affect insurance cover. If it does not, your insurer may require a full replacement with an approved lock.

What areas does Page Security cover?

We provide locksmith and security services across London and the South East. Our team covers a wide range of postcode areas, ensuring both residential and commercial clients receive rapid assistance.

Is the work guaranteed?

Yes. All work carried out by Page Security is guaranteed, giving you confidence that repairs, rekeying, or replacements are done to the highest professional standard.

Do you provide emergency call-outs?

Yes. Page Security offers a 24/7 emergency locksmith service with a response time of 15–30 minutes in most cases.

Lock Rekeying Service vs. Replacement: Which Is Right for You?

Key Takeaways