Lock Change & Replacement
When you move into a new flat on Garratt Lane, complete a sale on a Victorian terrace near Earlsfield station, or discover your front door lock has been tampered with, the first call to make is to a locksmith you can trust to arrive quickly and get it right first time. Earlsfield Locksmith is a 24/7 mobile lock change service covering Wandsworth and the surrounding area — our trained, insured technicians come to you, assess your existing locks on the doorstep, and fit the right replacement without unnecessary damage to your door or frame.
Open 24 hours, 7 days a week · Fully insured
Whether you need a straightforward euro cylinder swap on a uPVC door, a full 5-lever mortice deadlock upgrade on a period property, or an emergency lock change after a break-in, we carry a range of quality hardware in our van so most jobs are completed in a single visit. We work with homeowners, tenants, landlords, letting agents, and housing associations across Wandsworth — and because we are a truly local, mobile locksmith London service, we understand the mix of property types you find in SW17 and SW18, from purpose-built blocks of flats to converted Edwardian houses with traditional timber doors.
What we do
Available 24/7
Day, night, weekends and bank holidays — a real local locksmith answers and sends a fully-stocked van.
We come straight away
Based in Wandsworth, we send a locksmith straight away — we're usually with you in about 30 minutes.
Fully insured
Vetted locksmiths, a clear price on the phone, and no surprise add-ons when we arrive.
Damage-free entry
We pick and bypass locks the right way, so most lockouts are solved without drilling anything.
Why a Lock Change Is Often the Smarter Choice
Replacing a lock or cylinder is usually more straightforward than people expect, and it is almost always preferable to simply cutting a new key when security has been compromised. If you have just moved into a property, recently ended a tenancy, lost a key, or had a dispute with a previous occupant, you cannot know with certainty how many copies of the original key are in circulation. A door lock change eliminates that uncertainty entirely — from that moment, only the keys you hold can open your door. Tenants and landlords alike benefit from this clean break, and many home insurance policies actually require locks that meet British Standards before a claim will be accepted.
In Wandsworth's older housing stock — the wide streets of Earlsfield and the terraced rows near Tooting Bec Common are good examples — front doors were traditionally fitted with a Yale-type nightlatch on the top rail and a 5-lever mortice deadlock lower down. If either of those locks is worn, visibly forced, or simply old, replacement makes far more sense than patching. For uPVC and composite doors, which are common on the newer developments around Wandsworth town centre, the euro cylinder is the working heart of the multipoint locking system; fitting an anti-snap, anti-pick, anti-drill cylinder rated to TS007 3-star or at least TS007 1-star with a 3-star handle dramatically reduces the risk of a technique called cylinder snapping, which is one of the more common forced-entry methods used on this style of door.
Our Lock Change & Replacement Services — What We Cover
Our mobile technicians carry stock to handle the most common lock change scenarios in a single visit. For timber doors that is typically Yale-pattern nightlatches, British Standard 5-lever mortice deadlocks (BS3621 — the standard most insurers specify), and rim deadlocks. For uPVC and composite doors we stock euro cylinders in a range of lengths and security grades, including TS007 3-star anti-snap options suitable for insurance purposes. We also work on multipoint lock mechanisms where the euro cylinder is functional but the gearbox or shootbolts have failed — a fault that often leaves a door locked shut or impossible to secure properly. French doors and rear uPVC patio doors are equally within scope; back-door security is frequently overlooked in Wandsworth's terraced properties, where easy rear garden access can make a poorly secured back door an attractive target.
Beyond straightforward cylinder swaps, our lock change service covers communal entrance doors on blocks of flats — where a landlord or managing agent may need several doors brought onto a master-key system — as well as overnight or weekend emergency call-outs following a burglary attempt. When damage is present, we aim to work in a damage-free way wherever the door condition allows; where a frame or keep has been forced, we will advise on the most secure repair before fitting the new lock. The full list of specific services we provide includes: euro cylinder replacement; anti-snap cylinder upgrade; TS007 3-star cylinder fitting; BS3621 5-lever mortice deadlock supply and fitting; Yale nightlatch replacement; rim deadlock fitting; multipoint lock mechanism replacement; uPVC door lock repair; composite door lock replacement; French door lock replacement; patio door lock replacement; communal entrance door lock change; landlord lock change between tenancies; tenant lock change with landlord consent; emergency lock change after break-in; insurance-rated lock upgrade; damaged lock replacement; worn or stiff lock replacement; lock change following lost keys; lock change after key theft; lock change after relationship breakdown; period property lock upgrade; period property mortice lock fitting; anti-drill cylinder fitting; anti-pick cylinder fitting; high-security cylinder upgrade; door furniture assessment alongside lock fitting; same-day lock change London; 24-hour emergency locksmith London call-out; and lock change advice for letting agents and housing associations.
Pricing, Timing, and What to Expect on the Day
We know that needing a lock change — especially in an emergency — can be stressful, so we aim to make the process as clear and straightforward as possible. When you call us on 020 3757 5840, we will ask a few quick questions: what type of door and lock you have, your postcode district, and whether the situation is urgent. From that information we can confirm an exact, up-front quote before anyone leaves to come to you. The final figure reflects factors such as the lock type and security grade needed, the parts required, the time of day (evenings, weekends, and bank holidays are reflected in the call-out element), and travel distance. There are no hidden additions once work begins — what we quote is what you pay.
Once our technician arrives — and for emergency situations we aim to be with you in around 30 minutes — the first step is a quick assessment of your existing door and lock. We will explain what we recommend, why, and what the security benefit is before touching anything. For landlords arranging a lock change between tenancies, we can often schedule a time that suits both the outgoing tenant's checkout and the new tenant's move-in. If you are a tenant changing a lock with your landlord's written consent, we are happy to provide a brief job report for your records. We carry proof of insurance and are happy to show it on request.
Emergency Lock Change London — When Time Matters
A lock change becomes urgent in a handful of situations: a burglary attempt that has damaged or weakened the cylinder, a lock that has failed and left you unable to secure your home, or a sudden change in personal circumstances where you need to know that an old key will no longer work. As a 24 hour locksmith London service, we operate around the clock — including late evenings, overnight, weekends, and bank holidays — precisely because those situations rarely happen at a convenient hour. If you are standing on your Earlsfield doorstep at midnight with a door you cannot secure, call 020 3757 5840 and we will send a technician straight away.
For post-break-in situations, we always recommend calling the police first so the incident is recorded — this is important for any subsequent insurance claim. Once the scene has been attended to, our technicians can carry out the emergency lock change and advise on any additional security measures the door may need. Where the door frame or strike plate has been damaged, we will make that clear so you can arrange any necessary repairs alongside the lock work. A thorough job now means a properly secured home tonight and a valid basis for an insurance claim tomorrow.
Frequently asked questions
How do I know which lock my insurer requires?
Most UK home insurance policies that specify a lock standard ask for a BS3621 5-lever mortice deadlock on timber doors, or a TS007 3-star rated euro cylinder (or a 1-star cylinder combined with a 3-star door handle) on uPVC and composite doors. The exact wording varies between policies, so it is worth checking your policy schedule or calling your insurer before we arrive. When you call us, describe your door type and we can advise which cylinder or lock grade is likely to satisfy a standard insurance requirement — we carry insurance-rated options as part of our regular stock.
Can a tenant change the locks, and what is the landlord's position?
In England, a tenant has the right to reasonable security in their home, but changing the locks without the landlord's knowledge can create disputes and may breach the tenancy agreement. The practical solution in most cases is to inform your landlord or letting agent in writing and ask for consent before the work is done — many agree readily, particularly between tenancies or following a security concern. If consent is given, we are happy to provide a brief job report and can arrange for a spare key to be made available to the landlord as part of the agreement. Landlords who want a lock change carried out between tenancies should note that we can schedule that work to align with checkout and check-in dates.
What is cylinder snapping, and should I be worried about my uPVC door?
Cylinder snapping is a forced-entry technique where the euro cylinder — the barrel-shaped lock core in most uPVC and composite doors — is snapped at a weak point using basic tools, allowing the door to be opened in seconds. It is a known issue in Wandsworth and across London, particularly on older uPVC doors fitted with standard, unprotected cylinders. The solution is straightforward: an anti-snap cylinder, ideally rated to TS007 3-star, is designed to break away in a controlled manner that leaves the internal mechanism intact and the door secured. If your uPVC door has not had its cylinder upgraded in the last several years, a cylinder replacement is a worthwhile precaution rather than a reaction to an incident.
How is the price for a lock change worked out, and are there hidden charges?
When you call 020 3757 5840, we will ask about your door type, the lock or cylinder involved, your postcode, and whether the job is urgent. Using that information we confirm an exact quote before we travel to you — there are no additional charges added on arrival. The factors that influence the final figure include the type and security grade of lock or cylinder needed, any parts that need to be sourced, the time of day (call-outs in the evening, on weekends, or on bank holidays reflect the out-of-hours element), and travel distance from our nearest available technician. Once a price is agreed on the phone, that is the price you pay.
How quickly can you get to me for an emergency lock change in Wandsworth?
For emergency situations we send a technician straight away and are usually with you in around 30 minutes, though actual arrival time depends on where our nearest available technician is and the conditions on the road at that time of day. We cover Wandsworth — including Earlsfield, Tooting, Balham, Southfields, and the surrounding areas — around the clock, so there is always someone available regardless of when you call. We will give you an honest estimate of travel time when you phone, so you are not left waiting without information.
Do you work with landlords and letting agents on a regular basis?
Yes, landlords, letting agents, and housing associations make up a significant part of our regular work across Wandsworth. Common requests include lock changes between tenancies, security upgrades to meet insurance requirements on rental properties, and emergency call-outs when a tenant has been locked out or a lock has failed. We understand that timing matters in a lettings context — a property that cannot be secured delays a new tenancy — so we aim to be flexible around checkout and move-in schedules. If you manage multiple properties in the area and want a reliable mobile lock change service you can call on regularly, we are happy to discuss how we can support that.