One of the first questions people ask after losing their keys or moving home is, "How much does a lock change cost?"

The honest answer is that there isn't a single price.

The cost depends on several factors, including the type of lock, the level of security required and whether you're replacing one lock or several. Because there are hundreds of different lock types and sizes, it's impossible to give an accurate price without first knowing what's fitted to the door.

What Affects the Cost?

Several things determine the overall price.

The Type of Lock

Not all locks are the same.

Common examples include:

• Euro cylinder locks.
• Mortice sashlocks.
• Night latches (Yale locks).
• Oval cylinders.
• Rim cylinders.
• Multipoint locking systems.

Each requires different parts and fitting methods.

The Level of Security

Locks are available in different security grades.

For example, euro cylinders range from basic standard cylinders through to high-security snap-resistant models that are designed to resist common forms of attack.

Choosing a higher-security lock will generally cost more than a basic replacement but offers greater protection.

How Many Locks Need Replacing?

Sometimes only one lock needs changing.

Other situations may involve:

• Front and back doors.
• Patio or French doors.
• Garage access doors.
• Internal security doors.

Replacing multiple locks naturally increases the overall cost.

Is the Existing Lock Damaged?

A straightforward lock change is usually quicker than repairing a damaged locking mechanism.

If a door has been forced, jammed shut or has underlying alignment issues, these may need to be addressed at the same time to ensure the new lock operates correctly.

Common Reasons for Changing Locks

People choose to replace their locks for many reasons, including:

• Lost keys.
• Moving into a new home.
• Keys not returned by previous occupants.
• Worn or unreliable locks.
• Upgrading home security.
• Following a burglary or attempted break-in.
• Replacing an incorrectly fitted lock.

Sometimes the existing lock still works perfectly but changing it provides valuable peace of mind.

Is It Worth Upgrading the Lock?

If you're already replacing the lock, it can be a good opportunity to improve security.

For example, some older euro cylinders can be replaced with modern snap-resistant cylinders that offer greater protection against forced entry.

Or 5 lever mortise locks upgraded to insurance approved BS3621 locks.

Equally important is ensuring the replacement lock is the correct size. Even a high-security cylinder can be less effective if it protrudes too far beyond the door handles.

Should You Choose the Cheapest Lock?

Price shouldn't be the only consideration.

A quality lock that's correctly fitted is usually better value than a cheaper alternative that offers less security or wears out prematurely.

The aim should always be to fit a lock that is appropriate for the property, provides reliable security and operates smoothly.

Why It's Difficult to Advertise Fixed Prices

Many people search online expecting to find a fixed price for a lock change.

The reality is that locksmiths encounter a huge variety of doors and locks.

For example:

• Euro cylinders come in many different lengths.
• Mortice locks are available in numerous case sizes and backsets.
• Some doors require specialist or obsolete parts.
• Security upgrades vary depending on the customer's requirements.

Without seeing the lock—or at least knowing the type and size—it's impossible to provide an accurate quotation.

A reputable locksmith will usually ask a few questions or request a photograph before giving a price.

Choosing a Locksmith

When comparing quotations, it's worth asking:

• Is the quoted price fixed?
• Does it include parts and labour?
• What type of lock will be fitted?
• Is the lock suitable for your door?
• Is there a guarantee on the parts?

A clear quotation helps avoid unexpected costs.

Conclusion

The cost of changing a lock depends on the type of lock fitted, the level of security you choose and whether any additional repairs are required. Rather than looking for the cheapest option, it's worth ensuring the replacement lock is suitable for your door, correctly sized and professionally fitted. A properly installed lock not only improves security but can also provide years of reliable service.

Lock Changes by A.L.S. Locksmiths

At A.L.S. Locksmiths, every lock change begins with identifying the correct lock for your door. Whether you've lost your keys, moved into a new property or want to upgrade your home's security, you'll receive a fixed price quotation before any work begins. There are no call-out charges, no hourly rates and no VAT, and all replacement locks are fitted correctly to ensure they provide the level of security they were designed to offer.