Lock Replacement
Professional Door Lock Replacement Across North London, from Greenford and surrounding areas
Lock Replacement
Need a lock changed? Watchdog Locksmiths provides fast, professional lock replacement for homes and businesses, with DBS-checked locksmiths, clear pricing and no call-out fee.
Need Your Locks Replaced? We’ve Got You Covered
If you are searching for lock replacement, you may have lost your keys, moved into a new property, experienced a break-in, or simply have an old or unreliable lock that needs changing.
Watchdog Locksmiths provides professional door lock replacement across North London, Greenford and the Surrounding areas. Our DBS-checked locksmiths replace locks on residential and commercial properties and can advise on the most suitable replacement for your door, security requirements and budget.
We work with common locking systems including Euro cylinders, rim cylinders, night latches, mortice locks and multipoint locking systems.
If your existing lock can be repaired safely, we will explain that option too. If replacement is the better choice, we will explain what is required and provide a clear quote before carrying out the work.
With no call-out fee, you pay for the locksmith work required rather than simply paying for somebody to arrive.
Local Lock Replacement Services
There are many reasons why a door lock may need replacing.
Watchdog Locksmiths can help with:
- Front door lock replacement
- Back door lock replacement
- Euro cylinder replacement
- Rim cylinder replacement
- Mortice lock replacement
- Night latch replacement
- uPVC and composite door lock replacement
- Locks damaged during an attempted burglary
- Replacement after lost or stolen keys
- Worn or repeatedly failing locks
- Moving-home lock changes
- Security upgrades
- High-security anti-snap lock installation
- Commercial lock replacement
Our locksmith will assess the existing lock and door before recommending the appropriate replacement rather than automatically fitting unnecessary hardware.
When Should You Replace a Door Lock?
You do not need to wait until a lock completely fails before replacing it.
A lock replacement may be worth considering if your key has become difficult to turn, the lock regularly sticks, the cylinder feels loose, the mechanism is badly worn or the lock has already been damaged.
There are also situations where the existing lock may work perfectly well but changing it is still sensible.
For example, you may want to change your locks if:
- You have recently moved home
- Your keys have been lost or stolen
- You do not know who has copies of your keys
- A tenant or previous occupant has moved out
- The property has suffered a break-in or attempted break-in
- Your current locks do not provide the level of security you want
- Your home insurance policy specifies particular lock standards
If you are unsure whether your lock needs repairing or replacing, Watchdog can inspect it and explain the options.
Just Moved Home? Consider Changing Your Locks
Moving into a new home is one of the most common reasons for replacing door locks.
Even when every set of keys has apparently been handed over, you cannot always know how many additional copies may exist.
Previous owners, tenants, cleaners, contractors, neighbours or managing agents may have been given keys at some point.
Replacing the locks gives you control over who can access your new property.
Watchdog can inspect the main entry doors and replace the locks where required, including upgrading older cylinders to higher-security alternatives.
It is also a useful opportunity to check whether the locks fitted to the property are appropriate for the requirements stated by your home insurer.
Lock Replacement After Lost or Stolen Keys
Losing a key does not always mean somebody knows which property it belongs to, but where there is a realistic possibility that your address could be identified, replacing the affected lock can remove the risk.
The same applies to stolen keys.
A Watchdog locksmith can identify which lock needs replacing and, where appropriate, change the cylinder without unnecessarily replacing the complete door locking system.
If several Watchdog-compatible locks are being fitted, you can also ask about keyed-alike locks, allowing multiple compatible locks to operate from the same key.
Upgrade to a High-Security Lock
Replacing an older lock is also an opportunity to improve the physical security of your door.
For suitable Euro-cylinder doors, Watchdog can install the Watchdog 3 Star ALPS cylinder, a BSI Kitemark 3-Star security cylinder designed to resist common methods of attack including:
- Lock snapping
- Picking
- Bumping
- Drilling
- Twist attacks
Our locksmith can assess whether a high-security cylinder is suitable for your existing door and locking mechanism.
Being Protected by Watchdog means choosing security that is appropriate for the property rather than simply replacing an old lock with another basic lock.
Does Your Lock Meet Your Home Insurance Requirements?
Your home insurance policy may include conditions relating to the locks fitted to external doors.
The exact requirements depend on your individual insurer and policy, so you should always check your policy wording rather than assuming that a particular lock automatically guarantees compliance.
If you are replacing an older lock, Watchdog can identify the type currently fitted and discuss suitable BSI-rated and higher-security replacement options.
For timber doors this may include a BS3621 mortice lock, while suitable uPVC and composite doors can often be upgraded with a 3-Star Euro cylinder.
How Much Does Lock Replacement Cost?
The cost of replacing a lock depends on the type of lock, the replacement hardware required and the condition of the existing door and mechanism.
Watchdog’s current standard pricing includes:
Standard Rim or Euro Cylinder Replacement — from £69.99
Includes supply and fitting of a standard 1-Star replacement.
High-Security Rim or Euro Replacement — from £89.99
For customers upgrading to a higher-security option.
BS3621 Mortice Lock Installation or Replacement — £129.99
Dependent on the door type and existing installation.
If additional work is required because the door or locking mechanism is damaged, your locksmith will explain this before proceeding.
Watchdog provides clear pricing and no call-out fee, helping you understand what you are paying for before the work begins.
A Word from Paramjit, Director of Watchdog Locksmiths
“People often think about replacing a lock only when it stops working, but there are plenty of other reasons to change one. Moving home, losing a key or discovering that an older lock offers very little protection are all good reasons to review your security. We’ll look at the door first, explain what actually needs replacing and make sure the new lock is suitable for the property rather than fitting something unnecessarily..”
No Fix? No Fee!
Lock Replacement from just
£
69.99
Rated 5 stars with over 500 reviews
Loved by customers all over London and the Home Counties.
28
mins
Average response time across London
92
%
Of calls answered in under 10 seconds
Proudly Protecting Homes & Businesses Across London
Why Homeowners Choose Watchdog
See Why Customers Rely on Watchdog Locksmiths. Locksmith Reviews.
Real Reviews
Real Relief. Real Service.
“No call-out charge – genuinely refreshing. 5⭐️.”
Sophia Reynolds
Head of Operations at Brightwave
“Talked me through everything, upfront price, very professional.”
Marcus Bennett
Director of Marketing
“Changed all our locks after a break-in. Felt safe again immediately.”
Christopher Johnson
Team Lead, Horizon
“WhatsApp’d a photo – had a price in minutes. Job done fast.”
Ethan Ramirez
Director of IT
Frequently Asked Questions About Lock Replacement
How much does it cost to replace a lock?
The price depends on the type of lock and replacement required. Watchdog currently lists standard rim or Euro cylinder replacement from £69.99 and high-security replacement from £89.99. More complex locks and mechanisms may cost more.
Can a locksmith replace just the cylinder?
Yes. On many doors, replacing the cylinder is enough and there is no need to replace the entire locking mechanism. The locksmith will assess the existing system first
Should I replace my locks when I move house?
It is worth considering because you cannot always know how many copies of the old keys remain in circulation. Changing the locks gives you control over who has access to your property.
Should I change my locks if I lose my keys?
If there is a possibility that the lost keys could be connected with your address, replacing the relevant lock can remove the risk of somebody using them to enter your property.
Can you replace a uPVC door lock?
Yes. Depending on the fault, this may involve replacing the Euro cylinder, gearbox or complete multipoint locking mechanism.
What type of replacement lock should I choose?
That depends on your door, existing locking system, security requirements and insurance policy. A locksmith can inspect the door and recommend suitable options.
Can I upgrade to an anti-snap lock?
Yes. Suitable doors can be upgraded with high-security cylinders, including the Watchdog 3 Star ALPS cylinder.
Do replacement locks meet home insurance requirements?
Different insurers specify different requirements. Watchdog can fit recognised lock standards including BS3621 mortice locks and BSI 3-Star cylinders, but you should check the specific requirements stated in your own insurance policy.
Do you charge a call-out fee for lock replacement?
No. Watchdog Locksmiths does not charge a call-out fee. You will be given information about the work and pricing before proceeding.
Can you replace several locks so they use the same key?
Yes, depending on the lock types being installed. Ask about Watchdog keyed-alike options if you would prefer compatible locks around your property to operate from one key.