Window Lock Repair in Earlsfield

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Ground-floor windows with broken locks are one of the easiest ways into a property. It might sound dramatic, but it is a simple fact. A window that does not lock can be opened in seconds, often without making any noise at all. If you have a window lock that is broken, stuck, missing its key, or just not engaging properly, it is worth getting it sorted before it becomes a problem.


Earlsfield has a high concentration of ground-floor flats, basement conversions, and rear-access properties where window security is not just a nice-to-have but a genuine necessity. The Victorian and Edwardian houses that have been converted into flats often have large sash windows at street level with original or very basic locking hardware. The newer builds tend to have espagnolette handle mechanisms that can seize or strip after a few years of use.


Window lock problems we fix

       Handles that spin freely without engaging the locking mechanism

       Locks that are jammed shut, meaning you cannot open the window at all

       Missing keys for espagnolette or locking window handles

       Broken sash window catches, fasteners and Brighton fasteners

       Cockspur handles that have snapped or come loose

       Window stays and limiters that have broken or detached

       Child-safety restrictors that need fitting, adjusting or replacing

       Stiff or sticky window mechanisms that are getting worse over time


Repair or replace?

In many cases the window lock can be repaired or adjusted rather than replaced entirely. A stiff espagnolette mechanism might just need lubricating and adjusting. A sash fastener that is not catching might only need repositioning. We always check the simpler fixes first before recommending a full replacement.


Where a replacement is needed, we carry common window lock types, handles and fasteners in the van, so most jobs are completed in one visit. If your windows use an unusual or discontinued locking system, we can usually source a compatible replacement quickly.


Window security for landlords

If you are a landlord with rental properties in Earlsfield, working window locks are not optional. They are a basic safety and security requirement for your tenants, and broken window locks can cause problems with tenancy inspections and insurance cover. We can check and repair window locks across multiple properties efficiently if you need several units done at once.


For window lock repairs in Earlsfield and across South West London, call 020 3369 6009.

Popular lock change services in Wandsworth & Earlsfield

24-Hour Lock changes in Wandsworth

Our professional locksmiths can respond to emergency door lock change requests within 30 to 45 minutes. If you schedule the locksmith service a few hours in advance, we may apply a discount to the price.

Lock upgrades in Wandsworth

Wondering if your security is up to date, if your insurance will cover you in the case of a break-in. SMS Locksmiths can assist in these situations, we hold stock in our vans and can cover 90% of cases on the first visit. In addition, each of our locksmiths is CRB checked to ensure their professionalism and credibility. This means we can also change locks in schools, hospitals and public buildings.

High-Quality Locks at Affordable Prices

SMS Locksmiths always supplies high-quality locks, including British Standard locks. Our locksmiths recommend British Standard locks because of their reliability and durability. Free insurance advice is available upon request. We provide options on site ranging in price and security level to suit your needs.

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Our lock change locksmith will be able to change door locks, window locks, post box locks and many more.

Lock Replacement

Are you considering a door lock replacement? Enhancing your property's security with an upgrade, welcoming a new tenant and ensuring fresh access control, or recovering from a recent burglary to restore safety and peace of mind? SMS Locksmiths specializes in delivering professional lock replacement services. Every lock we supply and install is backed by a comprehensive one-year warranty, covering both materials and workmanship for added confidence.

Commercial Locks

SMS Locksmiths offer commercial lock change services for offices, stores, and other businesses in and around Earlsfield. We provide professional locksmith services for cash registers, lockers, master key systems, front doors, back doors, and any other door which needs to be secured. We can install window locks and upgrade your locks to high security locks to comply with insurance requirements for your business.

Window lock changes

Boost the security of your Earlsfield property with expert window lock changes and upgrades from SMS Locksmith. Whether you're addressing worn mechanisms, enhancing protection after a security concern, or modernizing for better functionality, our local DBS-checked technicians provide non-destructive installations to keep your windows intact and secure.

Lock upgrades

Upgrade your locks to enhance security and peace of mind for your Earlsfield home or business. Whether you want to boost protection against break-ins, meet insurance requirements, or switch to modern keyless systems, SMS Locksmith offers expert lock upgrade services tailored to SW18 properties. We can upgrade locks to different brands and provide the carpentry skills needed for these types of jobs.

UPVC Lock changes

SMS Locksmith Earlsfield specializes in UPVC lock changes for doors and windows, helping you restore security and functionality without hassle.

We offer:

  • Secure UPVC Lock Replacements: Swap out faulty euro cylinders or multi-point mechanisms with anti-snap, BS-compliant options to prevent break-ins.


Post box lock changes

Need a new post box lock in SW18? Whether your key has snapped, the lock is jammed, or you simply want a stronger, more secure lock, SMS Locksmith Earlsfield can replace it quickly and cleanly.

All post box lock changes come with a full one-year warranty on parts and labour.

Changes for fire safety

Upgrade to fire safe locks in SW18 for enhanced protection against fire risks and compliance with safety regulations. Whether you're replacing locks on fire doors, safes, or emergency exits, SMS Locksmith Earlsfield provides expert changes using certified, fire-resistant hardware to safeguard your property and occupants.

Bedroom door lock changes

Looking for a bedroom door lock change in SW18? Whether you need to replace a faulty internal lock for privacy, add child-safety features, or upgrade after wear and tear, SMS Locksmith Earlsfield provides quick and reliable services to keep your home secure and functional.


  • Replacing standard bedroom door locks with durable, easy-to-use options like thumb-turn or keyed cylinders
  • Installing privacy locks or emergency release mechanisms for bathrooms and bedrooms
  • Upgrading to modern designs with smooth operation and keyless entry for convenience
  • Providing spare keys and adjustments to ensure a perfect fit
  • Installing BS-compliant fire-rated locks and cylinders for doors and safes
  • Replacing standard locks with fire-resistant models that withstand high temperatures
  • Fitting multi-point systems for fire doors in residential or commercial settings
  • Providing spare keys and master key options for easy access control

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