Before you call a locksmith in London: checks and what to have ready

A good share of calls to a locksmith in London end with a job that the householder could have avoided, or at least made cheaper, by spending five minutes checking the door first. The lock that will not turn is often a dropped door; the key that will not go in is often a jammed cylinder; and the ‘broken’ night latch is sometimes just on the snib. This article sets out the checks you can safely make, the point at which to stop, and the information a locksmith needs so that the quote is accurate.

Safe checks for a door that will not lock or unlock

• Lift the handle before turning the key. On a uPVC or composite door, the multipoint lock only engages when the handle is lifted fully. If the key turns with the handle up but not down, the mechanism is fine and the problem is elsewhere.
• Look at the gap around the door. If the gap is wider at the top of the lock side than at the bottom, the door has dropped on its hinges and the bolts are missing the keeps. Lifting the door gently by the handle while turning the key often works as a temporary fix and tells you the lock itself is sound.
• Check the snib or deadlock button. Many night latches have a small button or lever that holds the latch back or deadlocks it. If it has been knocked, the door will behave as if the lock is broken.
• Try a different key. Worn keys are a common cause of a cylinder that will not turn. If a spare key works, the fix is a new key cut from the spare, not a new lock.
• Do not force it. If the key turns part way and stops, forcing it will snap the key in the cylinder and turn a cheap job into a dearer one.

If the key has snapped

Leave the broken piece alone. Pushing it in with a second key, tweezers or glue almost always pushes it deeper and damages the pins. A locksmith can usually extract a snapped key from a euro cylinder in minutes if nothing has been forced in after it.

What to have ready when you ring

1. Your full address, postcode and, for a flat, the floor and any entry code.
2. The door type: timber, uPVC, composite or aluminium, and whether it is a communal entrance or your own flat door.
3. The lock type if you can tell: a euro cylinder (the oval profile that takes a flat key), a mortice lock (the key goes into the edge of the door through a keyhole plate), or a night latch (the round cylinder with a latch on the inside).
4. What exactly has happened and when it started.
5. A photograph of the lock and the key, sent by text, which lets a locksmith quote accurately.
6. Proof you live there. A locksmith should ask for it before opening a door, and a good one will not open a door without it.
7. Any insurance requirement, such as BS3621 or TS007, if a lock is being replaced.

What is different in London

Greater London’s housing stock makes the pre-call checks matter more than anywhere else, because so much of it is shared. In a Victorian or Edwardian terrace that has been converted into flats, there are usually two doors between the street and your sofa: the communal front door, whose lock is the freeholder’s or managing agent’s responsibility, and your own flat door, which is yours. Tell the locksmith which one has failed. In a purpose-built block, the flat door is often a fire door with a certified lock, and the lease may restrict what can be fitted; a locksmith in central London or south London who works on flats regularly will ask about this. Leaseholders generally need the managing agent’s consent to change a communal lock, and renters need the landlord’s consent to change any lock, though a landlord cannot refuse an urgent repair.

Access is the other London factor. Most inner boroughs have controlled parking everywhere, and a locksmith who has nowhere to stop will charge waiting time or decline the job. Warn them about parking, and if you have a resident visitor permit, say so. A locksmith based in your borough will usually be cheaper than a 24 hour locksmith London call centre dispatching from the other side of the city.

When to call a professional

Stop checking and ring someone when the door is open and will not lock (you cannot leave the property secure), when a key has snapped, when a uPVC handle has gone floppy (the gearbox has failed and the door may not open at all once closed), or when there has been a break-in. Locksmithing is unregulated in the UK, so check Master Locksmiths Association membership and ask for identification at the door. If a break-in has damaged a door frame, a joiner may be needed. If the lock in question is an electric strike or entry system wired into the building, new circuits in England are notifiable under Part P of the Building Regulations and need a registered competent person such as an NICEIC or NAPIT electrician, not a locksmith.

How much does it cost for a locksmith in London?

As a rough guide, a daytime lockout typically costs between £80 and £140 in London, more at night and more again for an emergency locksmith London call centre booking, and a lock change typically starts at around £100 plus the lock. The checks above will not change the rate, but they will change whether you need the call at all. Always get a written quote by text before anyone sets off.

If you have done the checks and still need a locksmith in London, describe the door and what you found to The Household Daily help desk on WhatsApp and the team will help you take the next step.

Guidance is general and refers to the authority that sets each rule. Costs are indicative ranges; always get written quotes. Trade availability and credentials are confirmed when you enquire.