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Handle spinning, snapped or turning without locking? We replace failed locking mechanisms and broken window handles on uPVC and aluminium casement windows, keeping the frame and glass. Mechanisms from £175 per window, handles from £108, all in.
Send a photo or video. Most quotes come back within 15 minutes.
Free repair quote
A few quick taps. A local engineer replies within 15–30 minutes.
We specialise in uPVC and aluminium double-glazed windows and doors.
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A window lock repair means taking out the failed locking gear inside the opening sash of a uPVC casement window and fitting a correctly matched replacement. It fixes a handle that spins, sticks part way round or turns without securing the window, without replacing the window.
At Window Fixers it costs from £175 per window, including the new mechanism, fitting, resetting the keeps and VAT, and it is usually done the same day. Handles start from £108.
Mechanism, fitting and VAT included
Fitted and tested in one visit
On parts and workmanship
No call-out charge, ever
If any of these sound familiar, the locking gear inside the sash is the likely cause. Send us a photo and we’ll confirm before you book.
The handle turns all the way round with no resistance, usually a broken gearbox or sheared drive.
The handle turns fully but the sash stays loose, because the cams never reach their keeps.
The handle stops dead part way round, often at 45 degrees, and won’t go any further.
A cam or bolt has jammed in its keep, so the sash can’t be released from the handle.
A dry or binding mechanism needs a shove to turn, and forcing it is what snaps the gearbox.
Worn cams no longer pull the sash tight against the frame, so air gets in and it rattles in the wind.
We repair locks on outward-opening uPVC and aluminium casement windows, side-hung and top-hung. We don’t work on timber windows, sash windows, Velux or skylight windows, single or secondary glazing, water leaks or mastic replacement.
Fixed prices per window to supply and fit a matched mechanism, with the keeps reset so the sash closes evenly. VAT included and no call-out charge.
Handle turns but nothing grips, cams worn round or the sash sits loose in the frame.
Bolts not firing out, locking at one end only or catching on the keep.
Handle snapped at the base, wobbly on its spindle or worn in its socket.
Older single-point locks where the handle or wedge has worn and no longer clamps shut.
| Repair | Price per window |
|---|---|
| Espagnolette lock mechanism | £175 |
| Shootbolt lock mechanism | £175 |
| Worn or slipping gearbox | £175 |
| Snapped lock mechanism | £175 |
| Jammed or stuck window | £175 |
| Misaligned locking keeps | £175 |
| Snapped or loose handle, first handle | From £108 |
| Cockspur handle & wedge, first handle | From £108 |
| 3 or more windows at the same property | 20% off |
Prices are for standard, safely accessible uPVC casement windows. Very large, unusually heavy, externally glazed or hard-to-reach windows are quoted individually.
No home visit needed to get a price.
WhatsApp or email the whole window, a close-up of the handle and the lock strip on the edge of the sash. We identify the mechanism and send a fixed price.
Your engineer removes the failed mechanism, fits the matched replacement and resets the keeps so every cam engages evenly. No damage to frames or glass.
We run the handle with you and check the window locks without lifting or shoving. The rattle is gone, and you pay only when it’s done.
When you repair 3 or more windows
Repair the locks on three or more uPVC casement windows at the same property and take 20% off the price per window.
Save when you repair three or more.
Reduce draughts from faulty windows.
Smooth, secure window operation.
Eligible repairs include a warranty.
Standard repair pricing
Get 20% off eligible repairs
Applies to outward-opening uPVC casement windows at one address.
Send photos or a short video on WhatsApp for your no-obligation repair quote.
A handle that won’t lock rarely means a new window. We keep your frame, sash and glass and fit a new mechanism matched to the original.
Espagnolette strips, shootbolts, gearboxes, cockspur locks and restrictors in outward-opening casements.
Every replacement is matched to the backset, gearbox height, cam layout and handle centres of your window.
Lock mechanisms from £175 per window, agreed before we start. No call-out charge and nothing added later.
If we can’t complete the agreed lock repair, you don’t pay for it.
Parts and workmanship are covered for 12 months on every mechanism we fit.
Fully insured technicians working across every London borough and much of Kent.
Recent jobs from homes across London, with what each one cost, all in.
Side-hung uPVC casement, lock mechanism replaced. £175 all in
Top-hung uPVC casement, lock mechanism replaced. £175 all in
Top-hung uPVC casement, espagnolette lock replaced. £175 all in
Side-hung uPVC casement, shootbolt lock replaced. £175 all in
Side-hung aluminium casement, lock mechanism replaced. £175 all in
Side-hung uPVC casement, handle and lock replaced. £175 all in
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Google reviews
Straight from our Google Business Profile, unedited. Real homes, real repairs and real replies from the team.
Based on 148 reviews on Google
Latest review last week
Abir Shahid
last week
“Came and replaced my window hinges within an hour of contacting them. Fast and efficient service”
Window FixersResponse from the owner
Thank you so much for your lovely review! We’re really pleased we could get to you so quickly and replace your window hinges within an hour of your call. We always aim to provide fast, reliable and efficient window repair services. Thanks again for choosing us – we really appreciate your support!
S W
2 weeks ago
“Extremely professional and incredibly fast. A true window repair expert.”
Window FixersResponse from the owner
Thanks so much for the lovely feedback! Really glad we could get your window repair sorted quickly and that you were happy with the service. We always try to make things as easy and stress-free as possible for our customers. Thanks again for choosing Window Fixers, we really appreciate it!
Charming One
2 months ago
Have been using Glazie Ltd for all of my properties when there are window issues and they have never let me down! One phone call and they are on the case. Never get the feeling of being ripped off and always completed on time. I can honestly recommended them to anyone.
Window FixersResponse from the owner
Thank you so much for your continued trust and support! It really means a lot to know you’ve been happy with our window repair services across your properties. We always aim to respond quickly, do a proper job and keep our pricing fair and honest. It’s been a pleasure helping you over the years, and we’re always just a phone call away whenever you need us. Thanks again for recommending Glazie Ltd and Window Fixers!
Lesli
2 months ago
Appointment arranged for my convenience. A bit expensive but “Mr Luke”, who attended, methodically worked through to accurately diagnose the fault and rectify a tilt and turn window so well worth sorting to ensure working properly and secure. .
Window FixersResponse from the owner
Thank you for taking the time to share your experience! Really pleased to hear Luke was able to get your tilt and turn window working properly and securely again. We know window repairs aren’t always an expected expense, but we do our best to make sure the job is done properly and provides a lasting solution. We’ll be sure to pass your kind feedback on to Luke. Thanks again for choosing Window Fixers, we really appreciate it!
Jags Rayatt
3 months ago
This company is fantastic ! From booking the job to completion. I was told by an experience fitter of 20 years that I'd need a new door but this company came in and sorted my door hinges out and Luke gave me more advise regarding my door. I will definitely be using them again and recommending to all my friends and family
Window FixersResponse from the owner
Thank you so much for the fantastic review and for recommending us to your friends and family! We’re really pleased Luke was able to get your door working properly again by repairing and adjusting the hinges, especially after you had been advised that the whole door needed replacing. At Window Fixers London, we always aim to repair before replacing wherever possible, whether it’s faulty door hinges, locks, handles or alignment issues. It’s great to hear you were happy with the service from booking through to completion. Thank you again for choosing Window Fixers London, we’ll be happy to help whenever you need us in the future!
Bullchuck Bullchuck
3 months ago
“Amazing fast work good value for money. Highly recommended”
Window FixersResponse from the owner
Thank you so much for your fantastic review! We’re delighted you were happy with the fast service and great value. It was a pleasure helping you with your window repair. If you ever need window or door repairs in London, whether it’s a broken lock, faulty hinges, misted double glazing or any other issue, we’re always here to help. Thanks again for recommending Window Fixers London!
Niall McSheffrey
3 months ago
Very pleased with Luke's work, very clean efficient and professional. Had hinge replaced and two locks to my windows. I thought i needed 3 hinges but informed 2 were in good working order which saved me money. Thank you.
Window FixersResponse from the owner
Thank you so much for your wonderful review! We’re delighted to hear Luke provided such a clean, efficient and professional service. We always believe in honest advice, so we’re pleased we could save you money by only replacing the parts that genuinely needed changing. Thank you for trusting us with your window hinge replacement and window lock repairs. If you ever need reliable window and door repairs in London, we’d be more than happy to help again. We really appreciate your support!
Debra Leigh
3 months ago
Really pleased with the efficiency all round from booking & getting the job done - definitely recommend ⭐️
Window FixersResponse from the owner
Thank you for taking the time to leave such a lovely review! We’re really pleased to hear you were happy with the whole process, from booking through to completing the repair. Providing fast, reliable window and door repairs in London with great customer service is what we aim for every day. We truly appreciate your recommendation and look forward to helping you again if you ever need us.
Amy
5 months ago
Very quick response and arranged to come and do the fix the next day. Luke was fantastic and fixed our window on our second floor flat that others had refused to fix. Great quality repair and service thank you so much. I would highly recommend Window Fixers London!
Window FixersResponse from the owner
Thank you so much for your fantastic review and recommendation! We’re really pleased we could respond quickly and get your second-floor window repaired when others had been unable to help. Luke will be delighted to hear your kind feedback. We take pride in providing reliable window repairs in London, even for more challenging jobs, while delivering a high-quality repair and great customer service. Thanks again for choosing Window Fixers London—we’re always here if you need any window or door repairs in the future.
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Our engineers cover every London borough and much of Kent, in homes, flats, rentals and commercial premises. Not sure if we reach you? Send your postcode with your photos.
Can’t see yours? Send us a message and we’ll reply in minutes.
Replacing the locking mechanism in a standard uPVC casement window costs from £175 per window, including the new mechanism, fitting and resetting the keeps. Handles start from £108 for the first handle on a visit. Three or more windows at one property get 20% off.
That normally points to a broken gearbox or a sheared drive inside the mechanism. The handle still turns the spindle, but nothing is pushed along the sash, so no cam reaches its keep.
Usually not. The locking mechanism is a separate component. Where the sash and frame are sound, it can be replaced while the window itself stays exactly where it is.
A cam or bolt has jammed in its keep, or the gearbox has failed part way through its travel, so the handle can’t release the sash. It can normally be freed and the mechanism replaced without damaging the frame.
Stiffness usually comes from a mechanism running dry or starting to bind, or cams fighting keeps that have drifted out of line. Forcing a stiff handle tends to snap the gearbox, so it’s worth looking at early.
Yes. The cams pull the sash tight against the frame. If they are worn or no longer reach the keeps, compression drops and air gets through, often with a rattle in the wind.
An espagnolette is the metal strip in the edge of the sash with cams that engage keeps on the frame. A shootbolt drives bolts out of the top and bottom of the sash, giving a firmer clamp on taller windows.
Usually. Mechanisms are identified by backset, gearbox height, cam spacing and handle centres rather than brand, so an equivalent can normally be sourced even for windows that are decades old.
No. Our lock repair service covers uPVC and aluminium casement windows. We don’t repair timber windows, sash windows, Velux or skylight windows, single or secondary glazing, water leaks or mastic replacement. Send a photo if you’re not sure which you have.
Send photos or a short video on WhatsApp showing the whole window, the handle and the edge of the open sash with its lock strip. We’ll reply with a fixed price, usually within 15 minutes during opening hours.
A new uPVC window handle costs from £108 for the first handle, fitted, with additional handles on the same visit from £54 each. If the handle turns but nothing locks, the mechanism behind it has usually failed, which we replace from £175 per window.
Yes. Double glazing lock repair means replacing the espagnolette, shootbolt or gearbox inside the sash of your uPVC or aluminium double-glazed window. It is fitted and tested in one visit and covered by our 1-year guarantee.
