YOUR LOCK REPLACEMENT ENQUIRY
Planning your lock replacement job
Request a replacement lock for a fault, lost key or planned security change, with compatibility agreed.
What to include in your enquiry
- Existing lock and door
- Reason for replacement
- Insurer or landlord requirements
What should the quote cover?
Specify the complete fitting, keys, fixing and any door changes, plus disposal and testing.
Can a stronger cylinder make an unsuitable door secure?
The complete opening matters. Ask about the frame, mechanism and fitting rather than selecting a cylinder alone.
Local property and responsibility checks
Check authority, retained door details and current property controls before cutting or replacing hardware; no generic lock choice grants consent.
- Existing lock and door
- Reason for replacement
- Insurer or landlord requirements
Further guidance: Planning heritage and building control · Mid Suffolk repair responsibilities
Why change a lock?
Quick answer
Request a quote to replace a worn lock, change cylinders after moving home or update a lock after keys are lost.
Lost or unreturned keys, a failed component, damage after a break-in or an unsuitable security specification can justify replacement. These are different reasons and may lead to different work. Explain whether you want to prevent an old key working, correct a mechanical fault or improve resistance to attack. An upgrade should suit the whole door and frame. A new lock cannot compensate for poor hinges or rotten timber, and an entry problem may need alignment work as well as replacement.
| Purpose | What the proposal should address |
|---|---|
| Prevent use of a missing key | Which entrances or managed systems still use that key? |
| Restore operation | Is the fault in a cylinder, mechanism or surrounding door? |
| Improve security | What compatible specification is proposed for the complete entrance? |
Lost keys and a change of occupier
If you cannot account for all copies, discuss changing the appropriate keyed component. Mention linked locks, communal doors and any restricted or managed key system. A tenancy or managed building may impose arrangements for authorisation and key supply, so check directly with the relevant person. Do not send key photographs or identifying security details through this form. Record who is to receive the new keys and how obsolete copies will be dealt with. Replacement should give legitimate occupants reliable access without bypassing agreed management arrangements.
Cylinder or complete lock?
On some doors, a cylinder can be changed while the rest of the locking mechanism remains sound. Other failures involve the case, latch or multipoint gearbox. Ask the locksmith to identify the component and explain why that scope is sufficient. The new cylinder must be the correct size and compatible with the handle and door; appearance is not enough. A complete mechanism replacement should also account for the keep positions and normal operation. Do not assume every lost-key job needs a new door.
Ask for separate prices where there is a genuine choice between retaining a sound mechanism and replacing more of the system. The cheaper option is useful only if it achieves the intended function and security. Conversely, replacing serviceable hardware may add cost without addressing door movement. A written proposal should explain the choice and any limitations, including unavailable parts, unsuitable surrounding material or a need for other repair work before the new component can be fitted reliably.
Useful next steps
Insurer requirements and the complete opening
Provide the insurer’s actual wording, if any, and ask how the proposed fitting meets it. No universal lock specification is established here; the whole door, frame and mechanism must be compatible.
Timber, composite and protected doors
Identify the door construction and existing fitting. Describe any new holes, changed faceplate or visible hardware for a property-specific heritage check before altering a protected opening.
Sources: Mid Suffolk interactive mapping · Planning heritage and building control
Keys, exit arrangements and access needs
Consider how the door is used from inside as well as outside. Tell the professional about household mobility needs, children and any required escape arrangements. The right approach depends on the door, property use and applicable requirements; do not add a lock that obstructs an essential exit. Ask how spare keys, restricted copying or a thumbturn affect the chosen arrangement. Discuss these directly with the installer rather than requesting a product solely because it has the highest advertised rating. Demonstrate ordinary use before accepting completion.
A complete replacement quote
What to confirm
Specify the product, fitting work, supplied keys, old-part disposal and any adjustment. Ask the business to explain compatibility and evidence for a claimed security standard; no guide can verify a product from a vague description.
- The precise replacement part and why it is appropriate.
- Who can approve the work and receive the keys.
- Normal operation, exit arrangements and completion records.
After fitting the new lock
Check every supplied key and normal operation from both sides, where appropriate. Ask for the product details and retain the invoice. Store spare keys securely and avoid labels showing the property address. If other locks remain on an old shared key, establish whether the change achieves your intended security goal. Report stiffness or alignment problems promptly rather than forcing the new hardware. For planned work, send a clear enquiry including the postcode, door type and reason for replacement.
Useful next steps