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.

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)

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.