Services

Window Lock Repair & Fitting in Sutton & South London

Windows are a favourite entry point for opportunist burglars, and a seized handle, broken espagnolette or missing key can leave you exposed or unable to open the window at all, so we repair, replace and key-alike sash, casement, timber and uPVC window locks to keep you secure and your insurer satisfied.

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Many home insurance policies require key-operated locks on accessible windows, and a claim can be refused if they are missing or faulty. We fit insurer-compliant hardware and can key-alike multiple windows so one key operates them all, which is far more convenient.

uPVC casement windows rely on a multipoint espagnolette mechanism driven by the handle. When the gears or cam wear, the window becomes stiff or will not lock; we replace the mechanism and handle to restore smooth, secure operation without replacing the frame.

For families we fit window restrictors that limit how far a window opens, an important child-safety measure on upper floors that still allows ventilation, and on timber sash windows we can add discreet sash stops and quadrant locks that preserve the look of period frames.

What's Included

Casement, sash, timber and uPVC window locks
Espagnolette multipoint mechanism replacement
Window handle repair and replacement
Key-alike sets so one key fits every window
Child safety restrictors fitted
Insurer-compliant key-operated locks
Sash stops and quadrant locks for period windows
Lost window key replacements cut on site

How It Works

A clear, four-step process — from your first call to a job done right.

Tell Us the Issue
Describe the window type and fault; we give a clear fixed price before attending.
Assess Each Window
We check the handles, mechanisms and frames and recommend repair or replacement.
Fit or Repair
We replace handles, mechanisms or locks and can key-alike them to a single key.
Test and Advise
We confirm secure, smooth operation and check the result meets your insurer requirements.

Guide Prices

Indicative prices only — you always receive a fixed quote before we dispatch, with zero call-out fees.

Service	Guide Price
Window Handle Replacement	£35–£70
uPVC Espagnolette Mechanism Replacement	£80–£160
Casement / Sash Window Lock Fitting	£40–£90
Child Restrictor (per window)	£25–£55
Key-Alike Set (per window)	£20–£45
Lost Window Key Replacement	£15–£35

Frequently Asked Questions

Do I legally need locks on my windows?

There is no legal requirement, but most home insurance policies require key-operated locks on accessible windows. If yours are missing or broken, a burglary claim can be refused, so it is well worth bringing them up to standard.

My uPVC window will not lock. Can you fix it?

Yes. uPVC windows use a multipoint espagnolette mechanism driven by the handle. When it wears the window becomes stiff or will not lock. We replace the mechanism and handle to restore smooth, secure operation without changing the frame.

Can you make all my windows use the same key?

Yes. We can key-alike your window locks so a single key operates every window, which is far more convenient than carrying several. We can do this when fitting new locks or replacing existing ones.

Can you fit child safety locks?

Yes. We fit window restrictors that limit how far a window opens, an important safety measure on upper floors. They still allow ventilation and can be released by an adult when full opening is needed.

I have old timber sash windows. Will fittings spoil the look?

No. We use discreet sash stops and quadrant locks designed for period windows. They add security and meet insurer requirements while preserving the appearance of traditional timber frames.

Areas We Cover

Mobile across London, Greater London and Surrey — from our Sutton base out to Croydon, Wimbledon, Epsom and beyond.

See where we work on the areas we serve page, check typical costs in our locksmith pricing guide, or contact the team for a fixed quote with no call-out fee.