Send photographs, product or model details where relevant, your postcode and the result you need.
Locksmith · London
London locksmith help for secure, properly working doors
Whether a key turns badly, a latch no longer aligns or access has changed, the right solution starts with the complete door—not the lock in isolation.
- Lock faults and replacement options
- Door, frame and alignment checked together
- Homes, landlords and commercial premises
Send photographs, your postcode and a concise description of the work for a useful first assessment.
Locksmith guide
Identify the fault before changing the lock
A difficult key can be caused by a worn cylinder, damaged key, misaligned door, loose hardware or movement in the frame. Replacing the cylinder will not correct a door that is dropping on its hinges. We ask when the problem occurs, whether it changes with weather and if the door locks normally when open.
Send photographs of both sides of the door, the edge, lock faceplate and key profile without showing identifying key codes. A short description of the movement helps distinguish a lock fault from joinery or multipoint mechanism trouble.
The work, considered in detailLocksmith
Lock changes and replacement
Locks may be changed after moving home, loss of control over keys, tenant turnover or mechanical failure. The appropriate replacement depends on door material, lock case, dimensions and the level of security required. Existing holes and hardware condition also determine whether a straightforward change is possible.
We do not describe every replacement as an upgrade. A security improvement must suit the full doorset, including frame, strike, hinges and any glazing. Options and compatibility should be explained before parts are ordered.
- Cylinder and lock assessment
- Like-for-like replacement where suitable
- Latch and strike alignment
- Security review of accessible door hardware
Locksmith guide
UPVC and multipoint doors
A UPVC or composite door may use a multipoint strip with hooks, rollers or bolts. Problems can arise from alignment, handles, gearbox or cylinder. Forcing the handle can worsen damage. Model markings and clear edge photographs help identify the likely system.
Some mechanisms are obsolete or require exact measurements before sourcing. In those cases the first visit may be diagnostic rather than a completed replacement. This should be clear when the appointment is arranged.
Locksmith guide
Flats, communal doors and managed buildings
Communal entrances and flat front doors may form part of a controlled access or fire-safety system. Residents should not alter shared locks, closers or rated doors without permission. Lease conditions and management rules may specify approved hardware or contractors.
For rented premises, the person requesting work must have authority. Where access is requested rather than a routine repair, proof of identity and a legitimate connection to the property are essential. These checks protect occupants and should never be treated as an inconvenience.
A finish suited to the existing propertyLocksmith
Door alignment and physical security
A sound lock cannot perform properly if the door does not close into the frame. Loose hinges, warped timber, failed seals and worn keeps affect operation. Minor alignment may be part of the locksmith scope; substantial frame or door repairs may need carpentry.
Security is best considered in layers. Good key control, suitable hardware, correct fitting and everyday habits work together. We avoid absolute claims such as “burglar proof” because no single product can provide that promise.
Locksmith guide
Quoting and preparing for the visit
Pricing depends on the fault, door construction, parts and access. A standard identifiable cylinder differs from an obsolete multipoint mechanism or damaged timber door. The quote should identify parts where known and explain whether diagnosis, fitting and additional repairs are included.
Have identification and proof of authority available. Remove obstacles around the door and mention parking, concierge access or restricted hours. Do not dismantle a working security door before the appointment, as this can leave the property unsecured or make diagnosis harder.
Locksmith guide
Keys, handover and ongoing use
After replacement, count the supplied keys and test each from both sides where the door design permits. Check that the latch engages without lifting, pulling or forcing the door unless that action is an intended part of the mechanism. Household members and authorised occupants should understand any change in operation.
Avoid oiling a cylinder with an unsuitable household product, as residue can attract dirt or damage components. Keep key control organised and do not label spare keys with the full address. If operation becomes stiff again, report the circumstances early rather than applying more force to the handle or key.
Businesses and shared households benefit from a simple record of who holds keys and when they are returned. If several locks are to work with one key or access responsibilities are complex, explain that at quotation stage. Keying arrangements need to be designed deliberately and may affect product choice, lead time and future replacement options.
External doors should be checked periodically for loose screws, dragging, damaged weather seals and changes in alignment. Seasonal movement is common in timber, but repeated force is not a maintenance method. Early adjustment can protect the mechanism and may avoid a more disruptive failure when the door is next locked.
A clear visit
From first details to a checked finish
We review access, likely materials and important limitations before the appointment is agreed.
The working area is treated carefully and any material change to the scope is raised before extra work proceeds.
Operation, alignment or finish is checked as appropriate, with practical next steps explained clearly.
Transparent scope
Locksmith pricing
The figures are practical labour guidance. The confirmed price depends on the task, access, condition and required materials or parts.
Parking, congestion, specialist parts, disposal and work outside the agreed scope are separate where applicable.
See all price guidance →| Work | Price guidance | Useful detail |
|---|---|---|
| Guide starting price | From £83 | Final price depends on scope, access and materials. |
| Weekday first 30 minutes | £47 | Working-hours labour guidance. |
| Each additional weekday 30 minutes | £36 | After the initial period, where time-based pricing applies. |
| Weekday half day / full day | £260 / £460 | Four-hour and eight-hour labour guidance. |
Your confirmed quote and booking terms take precedence. A material change is discussed before additional work is undertaken.
London coverage
Planned around access to your part of London
Appointments are arranged across London subject to the job, access and schedule. Share the full postcode when enquiring so travel, controlled parking, loading restrictions and building rules can be considered.
For flats, managed buildings and commercial premises, include concierge details, lift booking, permitted working hours and the name of the person authorised to approve the work.
Find your London handyman area →Useful answers
Locksmith questions
These answers set out the practical starting point. Photographs and exact product or fault details allow a more specific response.
Can you replace a lock when I move home?
Yes, subject to door type, compatible hardware and proof that you are authorised to request the work.
Why does my door lock when open but not closed?
That commonly points to alignment between the door and frame rather than the key cylinder alone.
Can I supply my own lock?
You can, but dimensions, type and security suitability must match the existing doorset.
Do you work on communal entrance doors?
Only with appropriate authority and within building-management and fire-safety requirements.
What should I photograph?
Photograph both faces, the door edge, handles, lock faceplate and frame, without exposing identifying key information.
Is every faulty UPVC lock an emergency replacement?
No. The cause may be alignment, handle, gearbox, cylinder or the full mechanism, so diagnosis comes first.
Locksmith across London
Tell us what needs doing.
Send clear details, photographs and your postcode. We will use them to understand the scope and the sensible next step.