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uk Home & property emergencies

What to do if…
a key snaps in the lock and you cannot lock or unlock the door

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Stop turning, pushing, or forcing the key. Get yourself to the safest side of the door, keep the property as secure as you reasonably can, and arrange a reputable locksmith before the lock is damaged further.

Do not do these things

  • Do not keep twisting the remaining key or pulling hard with pliers; this can jam the lock or snap more metal inside.
  • Do not push the broken piece deeper with another key, pin, knife, screwdriver, or paperclip.
  • Do not pour glue into the keyway or try internet tricks that can permanently foul the lock.
  • Do not take the door lock apart yourself.
  • Do not accept pressure to drill the lock before the locksmith has inspected it; drilling or replacement may be needed sometimes, but it should usually follow inspection.
  • Do not be rushed by a very low headline price without asking what the call-out, labour, parts, VAT, and possible replacement costs include.
  • If you are inside, do not block your only safe exit with furniture or a wedge.

What to do now

  1. Get to the safest position first.

    • If you are outside and cannot secure the property, move to a well-lit place and, if possible, stay with a neighbour, friend, or nearby safe place while you arrange help.
    • If you are inside and cannot lock the door, keep the door closed, stay away from the doorway, and use a temporary wedge only if it does not trap you in an emergency.

  2. Check what has happened without forcing anything.

    • Look closely at the keyway: is any broken metal sticking out, or is it flush inside the lock?
    • Notice the lock type if you can, such as a euro cylinder on a uPVC or composite door, a mortice lock, or a night latch.
    • Check whether another door is usable for safe entry or exit.

  3. If the broken piece is visibly sticking out, avoid making it worse.

    • Do not pull hard, twist, or lever the fragment.
    • If the fragment is already loose and comes away with a light fingertip lift, keep it with the rest of the key.
    • If it resists at all, stop and leave it for the locksmith.

  4. If the broken piece is flush or deep, stop DIY.

    • Do not insert tools into the keyway.
    • Do not use another key to push, turn, or test the lock.
    • Keep all broken key pieces for the locksmith.

  5. Arrange a reputable locksmith.

    • Use the Master Locksmiths Association finder or a trusted local recommendation.
    • On the phone, say: “The key has snapped in the lock and I cannot lock or unlock the door.”
    • Ask for an estimate range and what is included, including call-out, labour, VAT, extraction, cylinder replacement, and extra keys.
    • Ask whether extraction is likely before replacement.

  6. If you rent or live in a managed building, use the fastest proper route.

    • Contact your landlord, letting agent, building manager, concierge, or emergency repairs number if you can do so without delaying urgent safety.
    • Ask whether they have an approved locksmith or access procedure.
    • Check your tenancy agreement later if there is any dispute about changing locks or paying for repairs.

  7. Make the visit easier without dismantling the door.

    • Take a clear photo of the lock, the door edge, and any multipoint locking strip.
    • Keep the broken key pieces together.
    • Move pets, shoes, and furniture away from the door so the locksmith can work safely.

  8. Call the police only if there is danger or crime.

    • If someone is trying to get in, you feel threatened, or there is immediate danger, call 999.
    • If there is no immediate danger but you need to report suspicious activity or a crime, use 101 or the police online contact route.

What can wait

  • You do not need to decide now whether to upgrade every lock.
  • You do not need to choose a new long-term security setup tonight.
  • You do not need to argue with the lock; stopping early can prevent a bigger repair.
  • You do not need to contact your insurer immediately unless there has been damage, a break-in attempt, theft, or your policy requires prompt notice.

Important reassurance

A snapped key is a common, fixable problem. It often happens because of wear, a sticking lock, the wrong key, or force on a jammed lock; pausing now can keep the repair simpler.

Scope note

These are first steps to keep you safe, avoid worsening the lock, and arrange practical help. Later decisions about lock upgrades, tenancy disputes, insurance, or locksmith charges may need specialist help.

Important note

This is general information, not professional locksmithing, legal, insurance, security, or emergency-services advice. If the door is your only safe exit, someone is at risk, or you are unsure what to do, prioritise immediate safety and use an appropriate professional or emergency service.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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