Lock Replacement Cost
South London
Honest, fixed prices from a DBS-checked locksmith. Euro cylinders from £135, BS3621 mortice locks from £180, anti-snap upgrades from £200. No call-out fee, no pushy upsells, no VAT surprises.
Fixed prices · No VAT add-ons · No call-out fee
What a lock change actually costs in South London
Most UK price guides average the whole country — useful if you're in Wrexham, less useful if you're in Wallington. This page shows the real fitted prices our locksmiths charge across South London in 2026, by lock type, not by hourly rate. Every postcode we cover is listed on our areas we cover hub, and the same fitted figures apply everywhere.
The price you see is the price we invoice. A Euro cylinder change is £135 fitted, full stop. A BS3621 mortice change is £180. A night latch replacement is £250. Deadlocks start at £180. Parts, labour, and VAT are included. Response time is 30–45 minutes across SW, SE, CR, SM, and BR postcodes — and if you want the technical background, our locksmith advice blog walks through lock types, BS3621 compliance, and security gradings.
Quick sanity check: if a locksmith refuses to give you a fitted price before they arrive, keep looking. Fixed quotes aren't a luxury — they're the standard any reputable tradesperson should give you. Get in touch if you want one before you book.
Fixed Fitted Prices by Lock Type
Every price below is the total we invoice — parts, labour, VAT, call-out, and the drive to your postcode. No hourly rate creep.
Euro Cylinder Change
Standard 5-pin cylinder for uPVC and composite doors. Insurance-compliant.
BS3621 5-Lever Mortice
British Standard deadlock for timber exit doors. Insurance-approved.
Anti-Snap TS007 3-Star
Upgrade cylinder that resists lock snapping attacks. Kitemarked.
Night Latch / Yale Rim
Surface-mounted automatic deadlatch. Timber front doors.
Commercial Lock Change
Office, retail, or HMO communal door. Heavy-duty stock.
Garage Lock Replacement
Up-and-over or side-hinged garage doors.
uPVC Handle Replacement
Like-for-like handle swap, no lock change needed.
uPVC Full Strip Replacement
Complete multi-point gearbox and handle set rebuild.
What actually affects your price
Six things change the final figure. None of them are hourly rates, parking, or mystery "trip fees" — we include all that upfront.
1. Lock grade chosen
A basic 5-pin cylinder starts at £135. A TS007 3-star anti-snap is £200. A Kitemarked Ultion £240. Higher grades cost more because the cylinders themselves cost more — not because the labour changes.
2. Door type
uPVC and composite doors take a Euro cylinder (fast). Timber doors with a mortice lock are slower to fit because the lock pocket is chiselled into the door edge. Different jobs, different prices.
3. Time of day
Daytime prices apply until midnight, 7 days a week. Only after midnight do out-of-hours rates kick in — and we'll tell you that figure on the phone before we set off.
4. How many locks
Changing one cylinder is the standard price. Changing four locks on a move-in property is cheaper per lock because we're already on site — we bundle the quote honestly.
5. Damage on the door
If the door, hinges, or gearbox are damaged, additional parts may be needed. We show you the issue in person and quote before touching anything. No "while we're here" surprises.
6. Insurance compliance
Your policy may demand BS3621 or TS007 locks. Fitting the wrong grade can void a claim. We check your policy wording first and recommend only what it requires — not a forced upsell.
Why "£49 lock changes" end up costing £400
The rogue-operator pattern is simple: cheap headline, expensive reality. If you've ever felt bait-and-switched on a lock call-out, this is probably what happened.
The £49 trap
- £49 is the labour-only figure — parts added separately
- "Call-out fee" of £80–£150 appears at the door
- VAT added on top at 20%
- Drilling charged as a separate £100 "destructive entry" line
- "Upgraded" cylinder sold at triple the retail price
- Final invoice often £350–£600, demanded before they leave
How we price instead
- No hidden fees — the fitted price you're quoted is the price you pay
- No VAT — every figure on this page is the total, full stop
- 12 months warranty on all locks we fit
- Cash or card accepted immediately on completion of work
How to check any locksmith in 30 seconds: ask for a fitted price before they arrive. Ask if there's a call-out fee. Ask if VAT is added. A real tradesperson answers in three numbers. A chancer changes the subject.
How our pricing actually works
Tell us the lock
Call or WhatsApp a photo of the lock and door. We recognise the type immediately and quote a fitted price before we leave the depot.
We arrive & confirm
30–45 minutes to any South London postcode. We confirm the quote matches the job in person. If anything is different, you decide before we start work.
Fitted & guaranteed
New lock installed, tested, and handed over. 12-month workmanship guarantee. Payment by card, cash, or bank transfer on completion.
Same prices, every South London postcode
We don't add "zone surcharges" or "distance fees". The fitted price is the same whether you're in Croydon CR0 or Penge SE20.
Postcodes covered
Boroughs & areas
Croydon, Sutton, Wallington, Purley, Coulsdon, Thornton Heath, South Croydon, Sanderstead, Kenley, Norbury, Streatham, Clapham, Brixton, Balham, Tooting, Wimbledon, Wandsworth, Putney, Lambeth, Camberwell, Peckham, Dulwich, Forest Hill, Sydenham, Crystal Palace, Bromley, Beckenham, Mitcham, Morden, Carshalton. Same fitted price across every borough.
Why South London picks us for lock replacements
What customers said about the price we quoted
"Got three quotes for a BS3621 mortice change. Two wanted an hourly rate plus parts plus call-out. Locksmith South London said £180 fitted on the phone and that was exactly what I paid. Refreshing."
"Moved into a terraced house in Peckham and needed five locks changed before insurance kicked in. Fixed bundle quote before they arrived, TS007 cylinders on the uPVC, BS3621 on the back door. Insurance paid out first time."
"Had a £49 guy quote £420 at the door before he'd even picked up a screwdriver. Sent him away, called these lot, £135 fitted including VAT. Took 25 minutes. Honest prices still exist apparently."
Lock replacement cost FAQ
How much does it cost to change a lock in the UK?
Is it cheaper to change just the barrel or the whole lock?
How much does an emergency locksmith cost out of hours in London?
Do my locks need to be BS3621 for home insurance?
How much does it cost to change all the locks in a house?
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Same fixed prices, same 30–45 minute arrival, every location and service below.
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Need a lock replaced in South London today?
Call or WhatsApp a photo of the lock — we'll quote a fitted price on the spot and be at your door inside 45 minutes.
24/7 emergency locksmith serving South London since 2015 — trusted by homeowners, landlords and businesses across Sutton, Mitcham, Wallington, Cheam, Purley and surrounding areas.