Change your locks for peace of mind

Change your locks for peace of mind

Changing your door locks is one of the simplest ways to restore security and control access to your home. Whether you’ve just moved in, lost a key, or had a recent security scare, we’ll make sure your doors are properly secured before we leave.

We help residential customers across London, the Home Counties, and up to Huntingdon.

Professional locksmith services London - Watchdog Locksmiths

uPVC door lock changes

  • Replace uPVC multipoint locks

  • Change euro cylinders (standard or anti-snap options)

  • Fix stiff handles or doors that won’t lock smoothly

  • Suitable for front doors, back doors and patio doors

Home door lock replacement

  • Lock changes for timber, composite and aluminium doors

  • Replace euro cylinders, mortice locks, night latches and deadlocks

  • Upgrade old or worn locks to improve security

  • Ensure locks meet home insurance requirements

Lock changes after incidents

  • Rapid lock changes after lost or stolen keys

  • Replace locks after a break-in or attempted burglary

  • Secure doors where keys may have been copied

  • Temporary fixes available if parts need ordering

Why homeowners choose Watchdog

  • Fast local response from trusted locksmiths

  • No call-out charges — honest, upfront pricing

  • DBS-checked engineers for your safety

  • Care taken to avoid unnecessary damage

  • 12-month guarantee on parts and labour (where applicable)

ExcellentGoogle star 1Google star 2Google star 3Google star 4Google star 54.9511 reviews
4.9Google star 1Google star 2Google star 3Google star 4Google star 5
Excellent511 reviews
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Chetan Kunwardia profile picture
Chetan Kunwardia
4 days ago
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Following my negative review below, the Management called me to apologise and learn more about my experience. The manager was very professional and took time out to understand my experience. They provided in house training to the staff. With this in mind I feel the staff really care and wanted to always provide excellent service. As such I now rate the business 4 starts. Extremely poor call centre staff. Their call receiving centre are unhelpful, poor command of the English language and dont know what is going on. It was impossible for me to speak directly to the Shop staff. When they promissed me a call back, this never happened. I had to physically drive to the shop to resolve my issue. Once at the shop my issue was resolved immediately. PLEASE CLOSE DOWN YOUR CALL CENTRE
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Ryan Larkin profile picture
Ryan Larkin
6 days ago
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Absolutely appalling service. Do NOT use this company! Watchdog Locksmiths left my vulnerable mother-in-law in a potentially dangerous situation by failing to fix her back door lock, leaving her home unsecured. The engineer misaligned the door, which meant the back door would not lock properly. Despite attending to resolve the issue, he was unable to fix it. To make matters worse, the engineer arrived without a uniform and was unable to open a key safe. You would expect a professional locksmith to have the necessary skills, equipment and experience to carry out such a basic job, especially when dealing with a vulnerable person whose safety and security should be the absolute priority. Instead, we were left with a faulty lock, an insecure back door and a vulnerable family member potentially at risk. This is completely unacceptable and shows a shocking lack of professionalism and competence. How can a locksmith company leave a vulnerable person’s home unsecured and consider the job done? The whole point of calling a locksmith is to ensure someone’s home is safe and secure, not to leave them in a worse situation than before. I would strongly advise anyone considering using Watchdog Locksmiths to think twice. Based on our experience, I would not trust this company with the safety and security of my family’s home.
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Anna Lakatos profile picture
Anna Lakatos
9 days ago
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Xavier made it to the rescue in lighting speed and let me back into my flat within 15 mins. Great service, recommend!!
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Shakir R profile picture
Shakir R
9 days ago
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Excellent service from Xavier! Very helpful, friendly and professional. Made everything quick and easy. Highly recommend!
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Dee Thomas profile picture
Dee Thomas
9 days ago
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Vassal very professional, and pleasant person.
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Steve Miley profile picture
Steve Miley
19 days ago
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Excellent service from Vatsal - efficient booking arrangements, clear re costs, efficient and effective lock change and such a friendly nice guy to have in the house. Will definitely use again.
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Tabarak Sadik profile picture
Tabarak Sadik
24 days ago
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Not sure how you got my review removed. I am a genuine customer and your company has ripped me off charging £300 to gain entry into my property when the rate established by the master locksmith association puts it at £90+vat.
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Terrell Cox profile picture
Terrell Cox
24 days ago
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We accidentally locked ourselves out of our flat at 2:30 in the morning. Vatsal came right over and quickly got us back in. No damage to the door. Very courteous and great communication. He was a life saver. Highly recommend
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ryan porter profile picture
ryan porter
41 days ago
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He arrived very quickly and managed to open my car with the keys locked inside. Would highly recommend!
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A D profile picture
A D
42 days ago
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Valsai what a life saver. I walked out of my house and pulled the front door closed and literally milli-seconds later realised that I had left my door keys on the side and now I've locked myself out great. Panic set in but I then remembered seeing a locksmith near were i live on Greenford road and (luckly i had my car keys at the time) so I drove down to thier office as I couldn't remember thier name but had driven past thier offices hundreds of times, saying good to know, but shouldn't need to use them!!!. Well today was that day. So I dropped in, I didn't have to wait long, and was greated by a helpful staff member who talked me through the booking process via WhatsApp, essy. I booked a locksmith via thier WhatsApp in the shop. it was confirmed in circa 5-10mins, I then drove back home 20mins later arriving back to be greated by one of the locksmiths waiting. He greated me as Valsai and talked me through the various options he had for trying to get me back in with the very, very, very last distructive option of having to drill out the lock, which neither of us realy wanted. which was a blessing to hear as if you've ever watched rogue traders you'll understand. This company in my eyes are 100% not that, nice feeling to have when your in such a position what ever time of the day. Valsai, was chatty and sincere about his work and reassuring to me that he was determined to get the lock open in under 30mins, which he did which was a relief. Prior to paying he offered me an option to purchase one of their upgrade serial linked locks, which if you did what I did, all you need do is go down to thier office with ID and the key reference and they will cut you a replacement key based, which is less than it cost for an emergency call out, to me value for money. I declined as funds a bit tight now more so due to this issue, but he wasn't pushing for a sale, he did advise if I changed my mind I could just go back to the office and pick one up there. Definitely thinking about it now, its cheaper than an emergency call out even if its in norm working hours.. Again as I have already said, these guys are definitely 5 star and actually come across as all genuine locksmiths...One thing I've learnt from today is check out registered locksmiths in your area who offer the registered lock system because it will save you money in the long run, even if you never need to call them ou, its peace of mind, thanks.

What we do:

  • 24/7 Emergency Lockouts
    Get back in fast, without damage to your doors.
  • Lock Repairs & Replacements
    We fix or upgrade locks on doors, windows, garages, and more.
  • New Lock Installations
    Insurance-compliant locks fitted by experts using BSI-approved hardware.
  • Key Cutting & Keyed Alike Systems
    Reduce your keyring and improve convenience
  • Burglary Repairs & Security Reinforcements
    Restore your peace of mind after a break-in.
  • Digital & Smart Lock Fitting
    Modern access control solutions for the smart home.
  • uPVC Door & Window Lock Repairs
    Common issues resolved quickly with minimal disruption.
1

Arrival in 30 Minutes

We’re local, so we’re fast.
2

No Call-Out Fees

You only pay for the work we do.
3

DBS-Checked Professionals

Trusted locksmiths you can feel safe letting into your home.
4

Fixed Quotes, No Surprises

Transparent pricing with no upsells.
5

BSI 3-Star Cylinder Locks

The highest rated anti-snap lock on the market.
6

12-Month Guarantee

All parts and labour are backed by warranty for your reassurance.

How quickly can you change my locks?

We aim to provide same-day service wherever possible, with 1-hour emergency response available in many areas.

Are the new locks insurance-approved?

Yes. We install BS3621-certified locks and 3-star cylinders approved by most UK insurance providers.

Do I need to change all the locks?

Not always. We’ll assess whether a re-key or full lock replacement is best for security and cost-effectiveness.

Can you upgrade to a higher-security lock?

Absolutely. We stock a wide range of anti-snap, anti-drill, and smart locks to suit different door types.

Can I send you a picture of my lock first?

Absolutely — we encourage it. You can send a photo of your lock via WhatsApp or our contact form, and we’ll assess it quickly to give you an accurate quote or confirm if we can carry out the work in a single visit. It helps us bring the right parts and avoid unnecessary delays.

Do you charge call-out fees?

No — we don’t charge any call-out fees. You only pay for the work we carry out. Our pricing is transparent, and we’ll always provide a clear quote before starting any job, with no hidden extras. Day or night, you won’t be hit with surprise charges just for showing up.