Locksmith South London — pre-booked and emergency locksmith, DBS-checked and fully insured
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Fixed Prices · No Hidden Fees

Lock Replacement Cost
South London

Lock replacement cost in South London — honest, fixed prices from a DBS-checked locksmith. Euro cylinders from £89, BS3621 mortice locks from £180, anti-snap upgrades from £200. No call-out fee, no pushy upsells, no VAT surprises.

Fixed Quote Before We Start No Call-Out Fee, Ever All VAT Included 30–45 Min Arrival
Call 020 8050 2017 WhatsApp a Photo
Fitted Prices Fixed
Euro Cylinderfrom £89
BS3621 Morticefrom £180
Anti-Snap Cylinderfrom £200
Security AuditFree
Call for Instant Quote

Fixed prices · No VAT add-ons · No call-out fee

Google 5.0 · 155 Reviews DBS Checked Fixed Prices · No VAT Add-Ons 12-Month Guarantee Fully Insured
SW · SE · CR · SM · BR postcodes 30–45 min average arrival Fitted prices include parts, labour & VAT No call-out fee BS3621 insurance-approved stock Anti-snap TS007 3-star cylinders SW · SE · CR · SM · BR postcodes 30–45 min average arrival Fitted prices include parts, labour & VAT No call-out fee BS3621 insurance-approved stock Anti-snap TS007 3-star cylinders

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 £89 fitted, full stop. A BS3621 mortice change is £180. A night latch replacement is £89. 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.

Pricing in Surbiton, Kingston, Eltham and Blackheath follows the same public floor — £89 lock replacement, no postcode surcharge inside our service area. (Pre-booked: Surbiton · Eltham · Blackheath.)

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.

Lock Replacement Pricing

Lock Replacement Cost — No-Surprise Prices

Fixed from-prices. Anything bespoke — send a photo on WhatsApp for a fixed quote.

Lockout Entry

£89 +
From
  • Non-destructive opening
  • 30-minute response
  • No call-out fee
  • Card or cash accepted
Call Now

Lock Change

£89 +
From
  • New cylinder + new keys
  • BS3621 insurance grade
  • Same visit, all keys cut
  • Move-in lock change ready
Call Now

Lock Replacement

£189 +
From
  • Full lock body swap
  • Mortice / multi-point / euro
  • Insurance-approved fitting
  • Stock in the van
Call Now

Other Work

Quote
WhatsApp Us
  • Anti-snap upgrades
  • Smart / sash / euro locks
  • uPVC mechanism repairs
  • Send a photo — fixed quote

uPVC & Security Door Lock Replacement Costs

Two of the most common questions we get are how much it costs to replace a uPVC door lock and what a security (insurance-grade) lock replacement runs to. The honest answer depends on which part has failed — here is a clear breakdown so there are no surprises.

How Much Does It Cost to Replace a uPVC Door Lock?

A "uPVC door lock" is really two separate parts, and the cost depends on which one needs replacing:

uPVC lock job From When you need it
Euro cylinder swap£135Worn, stiff or snapped barrel; new-home key change
Anti-snap cylinder upgrade£200TS007 3-star upgrade against lock snapping
Multi-point gearbox£350Floppy handle, hooks won't throw when you lift
Full mechanism strip£450Whole multi-point strip replaced end to end

Most uPVC "lock won't work" calls are actually the cylinder, not the whole mechanism — so the typical replacement is the lower figure. Because the exact gearbox brand varies, the safest way to get a fixed price is to send a photo of your lock on WhatsApp — see our full uPVC door problems guide for help identifying the fault.

Security Door Lock Replacement Cost

If you are replacing a lock specifically to meet your home insurance requirements, you want a British Standard, insurance-approved lock fitted properly:

  • BS3621 5-lever mortice lock — from £180. The insurance standard for wooden front and back doors.
  • TS007 3-star anti-snap cylinder — from £200. The security standard for uPVC and composite doors.

Every security lock we fit is insurance-approved and backed by a 12-month parts and labour guarantee. Compare the options on our security locks hub or read about anti-snap locks.

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 £89. 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

1

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.

2

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.

3

Fitted & guaranteed

New lock installed, tested, and handed over. 12-month workmanship guarantee. Card or cash accepted 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

SW2SW4SW9SW11SW12SW15SW16SW17SW18SW19 SE1SE5SE11SE15SE19SE20SE21SE22SE23SE25SE26SE27 CR0CR2CR4CR5CR7CR8 SM1SM2SM3SM4SM5SM6 BR1BR2BR3

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

5.0
Google · 155 Reviews
30min
Average Arrival Time
£0
Call-Out Fee
12mo
Workmanship Guarantee
DBS Checked Engineers BS3621 Insurance Stock TS007 3-Star Cylinders Fully Insured

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."

Olu A.Tooting, SW17

"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."

Hannah W.Peckham, SE15

"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."

Ricardo M.Streatham, SW16
Euro cylinder lock replacement South London fitted price

Lock replacement cost FAQ

How much does it cost to change a lock in the UK?
A standard Euro cylinder lock change in South London starts at £89 fitted. A BS3621 5-lever mortice lock starts at £180. Anti-snap cylinder upgrades start at £200. All our prices are fixed, with no call-out fee, and include parts, labour, and VAT.
Is it cheaper to change just the barrel or the whole lock?
For uPVC and composite doors, changing only the Euro cylinder barrel is usually the cheapest option at £89 fitted — the main lock body rarely needs replacing unless it's damaged. For timber doors with a BS3621 mortice, the whole lock body is typically changed as a single unit because the case and levers are integrated.
How much does an emergency locksmith cost out of hours in London?
Our daytime prices apply right up until midnight, seven days a week. Only after midnight do out-of-hours rates increase, and we'll give you the exact figure on the phone before we dispatch. There's no call-out fee at any time of day.
Do my locks need to be BS3621 for home insurance?
Most UK home insurance policies require BS3621 5-lever mortice locks on timber exit doors and anti-snap TS007 3-star cylinders on uPVC/composite doors. A non-compliant lock can void a claim, so the cheapest lock is rarely the best value. We check your policy wording first and fit only what it requires.
How much does it cost to change all the locks in a house?
A typical South London property with a front and back door plus 2–3 window locks usually costs £300–£550 fitted, depending on the lock grade you choose. We offer a free security audit and only recommend what's needed for insurance compliance and real-world security — never a forced upsell.

Also serving locksmith customers across South London

Same fixed prices, same 30–45 minute arrival, every location and service below.

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.

Pre-booked installs across South London

Same public-floor pricing — £89 lock change, no postcode surcharge — for pre-booked work in Battersea, Clapham, Surbiton, Kingston, Eltham and Blackheath.

The same £89 public-floor price applies to lock changes in Thornton Heath, Coulsdon, Sutton, Mitcham, Sidcup and Lock change in Bexleyheath DA6.

The same £89 public-floor price covers central and south-west London lock changes in Pimlico, Victoria, Fulham, Battersea, Chelsea and Balham.