Faulty Lock Replacement in Earlsfield

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Some locks are past saving. The internal mechanism is too worn to function reliably, the cylinder has been drilled or snapped in a break-in, the key barely turns even with force, or the moving parts inside have corroded after years of exposure to weather and neglect. When a lock has reached that point, replacement is the only sensible option.


We replace faulty locks on houses, flats, rental properties and commercial premises across Earlsfield and the surrounding area. We do not just pull the old one out and fit the cheapest replacement we have in the van. We check why the old lock failed first, because that matters for making sure the new one lasts.


Why checking the cause matters

A brand-new lock will develop the same problems as the old one if the real issue is a dropped door, a misaligned frame, a damaged handle set, or a keep that is mounted in the wrong position. We see this regularly in Earlsfield, where a previous locksmith or DIY attempt has replaced the lock without addressing the underlying problem, and the customer ends up paying for the same job twice within a year.

Where the door or frame needs adjusting, we do that as part of the job. It takes a few extra minutes but it means the replacement lock works properly from day one and stays working.


What we replace

       Failed euro cylinders, including upgrades to anti-snap, anti-bump and anti-pick specifications

       Worn mortice deadlocks and sashlocks

       Broken night latches and rim locks

       Seized or stripped multipoint lock gearboxes and hook mechanisms

       Internal privacy, bedroom and bathroom locks

       Window locks, catches and restrictors

       Locks damaged during break-ins or attempted forced entry


Upgrading as part of the replacement

If you are replacing a faulty lock anyway, it is worth considering whether to upgrade rather than fitting a like-for-like replacement. Swapping a basic cylinder for an anti-snap one costs very little extra but significantly improves your security. Fitting a BS3621 deadlock where there was only a night latch before brings you up to insurance standard. These are small changes that make a real difference, and since we are already there doing the work, the additional cost is minimal.



A faulty lock is not something to leave until later. What feels like a minor inconvenience today can easily become a lockout or a serious security gap tomorrow. For lock replacements in Earlsfield, 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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