Door Lock Services
The right lock depends on your door — not just your budget
A uPVC front door, a solid oak door and a composite door all lock differently. They use different mechanisms, different cylinder types and different standards. Fitting the wrong lock doesn't just leave you vulnerable — it can void your home insurance without you realising it.
We cover every mainstream door type across South London. uPVC doors get multi-point locking gearboxes and TS007 3-star cylinders. Composite doors get high-security lock cases matched to their specific make. Wooden doors get BS3621 5-lever deadlocks or appropriate Yale rim locks, depending on what the frame can carry.
All the pages below explain each door lock type in detail — what it is, what it fits, what it costs and when to replace it. If you just want a locksmith on the phone, call us and we'll work out which service you need.
Lock by Door Type
Security standard + recommended lock
uPVC door
TS007 3★Anti-snap cylinder + multi-point gearbox
Composite door
High-secMatched lock case + anti-snap cylinder
Wooden door
BS36215-lever mortice deadlock + rim latch
Aluminium door
Call usSpecialist cylinder — confirm before ordering
Our Door Lock Pages
Find your door lock type
Tap the page for your door type — full pricing, service details and coverage areas inside.
uPVC Door Lock Mechanism
Gearbox replacement, mechanism repair and handle barrel replacement for uPVC doors when the mechanism fails or feels stiff.
View Mechanism Repair →uPVC Multi-Point Locking
Full multi-point locking system replacement when your uPVC door won't lock properly, keys turn but don't engage, or the door has dropped.
View Multi-Point Locking →Composite Door Locks
Dedicated composite door lock service — covering Ultion, Yale Superior, and Avocet lock cases for composite doors.
View Composite Door Locks →Wooden Door Locks
Mortice deadlocks, rim locks and night latches for traditional wooden doors. All fitted to BS3621 where the frame allows.
View Wooden Door Locks →Best Locks for Wooden Doors
Independent comparison of BS3621 deadlocks, rim locks and night latches — which gives a wooden door the most security for the money?
Read the Guide →What to expect when you call us
Four things that actually matter when you need a lock fixed today.
Insurance-Approved Stock Only
We only carry BS3621 and TS007 3-star rated locks. Everything we fit satisfies standard UK home insurance policy requirements.
All South London Door Types
uPVC, composite and wooden doors across all South London postcodes — SE, SW, CR, SM, BR. We know which locks fit which doors.
Same-Day Service
Most door lock jobs are completed the same day. We carry common gearboxes, cylinders and lock cases in the van — no waiting for parts to be ordered.
12-Month Parts Guarantee
Every lock we supply and fit carries a 12-month parts guarantee. If a component fails within the year, we come back and replace it at no cost.
Why South London Chooses Us
Nine things that separate us from a locksmith who just shows up.
BS3621 & TS007 Only
Every lock we stock is insurance-rated. We won't fit a substandard cylinder because it's cheaper to source.
DBS Checked Engineers
Every engineer is DBS cleared, carries photo ID and arrives in a marked uniform. You know who's at your door before you open it.
24/7 — Including Weekends
Lock problems don't wait for Monday. We cover South London round the clock, 365 days a year, with no premium for antisocial hours.
Fixed Prices Upfront
You get the price before we start. No call-out fee, no surprise labour charge added at the end. What we quote is what you pay.
Fully Stocked Vans
We carry the most common uPVC gearboxes, cylinders and lock cases. Most jobs are done in a single visit with no return trip for parts.
5.0★ on Google — 155 Reviews
Real reviews from real South London customers. Read them on Google — we don't filter or curate what people say about us.
Local Engineers — Not a Callcentre
When you call, you speak to a locksmith who knows South London postcodes. No dispatch centre, no outsourcing to a sub who's never been to Croydon.
12-Month Guarantee
Every lock we fit is guaranteed for 12 months on parts. If anything fails in that time, we return and fix it. No debate, no charge.
No Subcontractors
The engineer who answers is the one who shows up. We don't outsource jobs to freelancers we've never met. Your address and security stay with us.
What our customers say
Real reviews from South London homeowners and landlords.
Our uPVC front door stopped locking properly on a Friday evening. Called at 7pm and the engineer was with us by 8:30. He had the gearbox in the van, replaced it on the spot, and the door's been perfect since. The price he quoted on the phone is exactly what we paid.
Natasha W.
Mitcham · uPVC door lock repair
Had a composite door fitted last year and the lock case developed a fault. Most locksmiths I called hadn't heard of the brand. These guys knew the Avocet lock case immediately, sourced a direct replacement and had it fitted in under an hour. Knew what they were doing from the first call.
David F.
Streatham · Composite door lock
I needed a BS3621 deadlock on my Victorian front door for insurance reasons. The locksmith arrived, checked the door frame properly before recommending anything, and fitted a 5-lever Chubb that works perfectly with the existing night latch. Didn't push me towards anything I didn't need.
Amma O.
Norbury · Wooden door BS3621 deadlock
Door lock questions answered
If your question isn't here, call us — we'll answer it in 60 seconds.
Also serving across South London
Need a door lock fitted or repaired today?
Tell us your door type — uPVC, composite or wooden — and we'll confirm the right lock and the price before sending anyone out.
No call-out fee · Fixed prices · DBS checked engineers · 24/7
24/7 emergency locksmith serving South London since 2015 — trusted by homeowners, landlords and businesses across Sutton, Mitcham, Wallington, Cheam, Purley and surrounding areas.