Jammed Locks
A key that won't turn either way feels like a broken lock, but the cause is usually elsewhere — a door that's dropped, a keep out of line, or a mechanism gummed up with wear. Knightsbridge Locksmiths frees and repairs jammed locks across Knightsbridge and London, opening the door without damage wherever possible and putting right whatever caused the bind.
Why a Lock Jams in the First Place
A jam is a symptom, and the fix depends on the cause. Sometimes it's the door that has moved, sometimes the mechanism that has seized, and sometimes the key itself — so it helps to describe exactly what's happening.
Key Won't Turn Either Way
When the key goes in but won't move in either direction, the door has usually dropped and bound the bolt. Realigning it frees the turn.
Seized or Gritty Mechanism
A lock stiff from wear, dirt or age can seize entirely. Servicing the mechanism, or replacing the worn part, gets it moving again.
Key Stuck or Snapped
Sometimes the key jams or shears inside the barrel. We extract it cleanly and free the cylinder without wrecking the lock.
One Team to Free a Jammed Lock
A bound bolt, a seized cylinder or a snapped key — the same engineer diagnoses why it jammed and frees it, opening the door non-destructively where we can and pricing the work before we travel.
Freed Without Wrecking the Door
A jammed lock doesn't have to mean a drilled one. We work the mechanism loose by picking, bypass and realignment first, keeping your door and cylinder intact, and only cut in as a last resort when nothing else will open it.
Non-destructive first
Picking, bypass and realignment before anything is drilled, so most doors open intact.
Cause fixed, not masked
The dropped door or worn part behind the jam put right, so it doesn't seize again.
Keys kept where possible
Freeing the mechanism rather than replacing it means your keys often still work.
Cut in only as last resort
Where a cylinder truly won't yield, we open it cleanly and fit a replacement on the spot.
Getting You Back Through the Door
Diagnosed at the door
We find why it jammed — alignment, wear or the key — before forcing anything.
Priced before we travel
Describe the jam and the quote you're given holds all the way to the invoice.
Damage kept to nil where we can
Most jams open without a mark on the door, which keeps repair costs down.
Local to SW1, SW3 and SW7
Based on Montpelier Street, we're quick to reach across Knightsbridge and nearby.
How We Clear a Jammed Lock
- Describe what's happening
Key won't turn, won't come out, or has snapped — a quick note helps us arrive ready.
- Opened on site
On arrival we free the lock non-destructively where possible and get the door open.
- Cause put right
Alignment, a worn part or an extraction sorted, with the fix quoted before we start.
- Tested and handed back
Cycled through until the lock turns cleanly, then handed over working.
Jammed Lock Call-Outs, Neighbourhood by Neighbourhood
Locks jam for different reasons across Central London — here's what our call-outs tend to involve in four of the areas we're called to most.
Jammed Locks Knightsbridge (SW7)
Heavy front doors around Ennismore Gardens swell in damp weather and bind the bolt, jamming a lock that was fine a week earlier. Easing the door and realigning the keep usually frees it without new parts.
Jammed Locks Chelsea & Belgravia (SW3 / SW1X)
Shop doors off Draycott Place take heavy footfall and their cylinders eventually seize mid-day. We free them fast and service the mechanism, so trading isn't held up.
Jammed Locks South Kensington (SW7)
Communal entrances around Queensberry Place jam when a worn cylinder finally seizes for every resident at once. A service or swap gets the door turning again for the whole building.
Jammed Locks Pimlico & Belgravia (SW1P / SW1E)
Back doors around Warwick Way often jam because a key has snapped off in an ageing cylinder. Extracting the key and freeing the barrel usually saves the lock.
Where We Free Jammed Locks
Based at 4 Montpelier Street in SW7, we clear jammed locks across Knightsbridge, Belgravia, South Kensington and Chelsea, with wider cover through the SW1 postcodes and central London. A key stuck fast or a fully seized cylinder, the callout works the same.
Knightsbridge & Belgravia
- Ennismore Gardens
- Montpelier Square
- Montpelier Walk
- Princes Gate
- Princes Gardens
South Kensington
- Queensberry Place
- Cromwell Place
- Petersham Place
- Elvaston Mews
Chelsea & Brompton
- Draycott Place
- Cadogan Gate
- Culford Gardens
- Blacklands Terrace
Home or business, the routine holds: find why the lock jammed, free it without wrecking the door, and leave it turning cleanly again.
FAQs — Jammed Locks
Why has my lock suddenly jammed?
Most sudden jams come from the door dropping or swelling, which binds the bolt against the frame. Worn or dirty mechanisms and a snapped key are the other common causes.
Can you open a jammed door without damaging it?
In most cases, yes. Picking, bypass and realignment open the majority of jammed locks with the door and cylinder left intact.
My key won't turn either way — is the lock broken?
Not usually. A key that won't turn in either direction more often means the door has moved and bound the bolt, which realigning fixes.
Can you get a snapped key out of the lock?
Yes. Broken keys are extracted with the right tools, and the cylinder is freed and often reused rather than replaced.
Will I need a new lock after a jam?
Often not. Where a jam is caused by alignment or a stuck key, freeing and adjusting it is enough — a replacement is only needed if the lock is worn out.
How fast can you come out?
Same-day visits are usually available from our Knightsbridge base for most SW1, SW3 and SW7 addresses. Call or WhatsApp to check the next slot.