Check who can authorise the work. A landlord, utility, council or emergency service may be the right first contact. This enquiry form is not an emergency dispatch service. Local reporting contacts are below; this enquiry service does not provide emergency dispatch.
Why change a lock?
Quick answer
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
Check the actual insurance terms and ask which documented lock specification meets them. A more expensive cylinder does not correct every weakness in a door, frame, hinges or fitting. Request the product identity, compatible installation and any making good in the quotation; our enquiry service does not endorse a particular lock or contractor.
Suffolk Police guidance discusses the whole entry point rather than the lock alone. Apply that as a reason to inspect the Haverhill door assembly, not as proof of local crime rates or a universal product requirement. Communal and fire doors need the responsible manager's agreement before changes.
Sources: Suffolk Police door security · Havebury repairs and maintenance
Timber, composite and protected doors
Identify the door and existing lock before ordering a replacement. Fixing position, thickness, frame condition and how the door must open from inside affect compatibility. Ask whether repair or a correctly fitted component can provide the intended result without unnecessary loss of sound fabric.
In Haverhill's protected buildings, replacing visible hardware or cutting into retained material can require a property-specific check. Listing and Article 4 controls are distinct; neither applies universally across the town. Obtain current advice for the actual proposal and confirm who can authorise it. A quotation should describe the component and fitting rather than promise that one lock makes the home secure.
Sources: West Suffolk listed building consent · Haverhill Article 4 directions schedule · Suffolk Police door security
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
Request the part specification, number of keys, attendance, fitting, adjustments and VAT. Clarify whether the old mechanism is retained, whether extra keys cost more and what any warranty covers. Agree how a failed door/frame condition will be addressed if discovered during installation. A basic cylinder swap, a security upgrade and a full mechanism replacement have different scopes, so compare the written detail before the total.
- 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