When keys go missing, first identify every door they operate, then decide whether the cylinders need different keying, different hardware, or both.
What does a rekey actually change?
A rekey changes the internal keying of a mechanical cylinder so it operates with a different key. It does not necessarily replace the handle, latch, lock body, or other hardware around that cylinder.
Lock replacement is a broader term. It might mean a replacement cylinder, a different lock assembly, or changes to several components. Ask which parts are being discussed. Otherwise, two people can use the phrase new lock while meaning different work.
Neither term explains the condition of the door. A dragging door or a latch that misses its strike needs a separate look.
Which doors did the missing key operate?
Do this before deciding how many cylinders to address. A business key might operate an entrance and an interior room. A management key may be part of a hierarchy that operates several groups of doors.
Write down what you know and mark what is uncertain. Do not test unfamiliar keys by forcing them into cylinders. Use the building's existing key information and the knowledge of the person who issues keys.
- Name each opening the missing key could operate.
- Identify shared doors separately from individual spaces.
- Note whether the key belongs to a master key arrangement.
- Identify who has permission to approve changes at each opening.
When is rekeying the question to ask?
Rekeying belongs in the discussion when the concern is who holds a working key and the existing hardware otherwise operates normally. Whether the cylinder can be rekeyed depends on its design and condition.
A staff departure, occupancy change, or missing key can all prompt that discussion. Returned keys do not tell you whether other copies exist. The owner or manager needs to decide how to handle that uncertainty.
If the entrance also uses electronic credentials, review them separately. Changing a cylinder does not remove a credential, and removing a credential does not change a physical key.
When does replacement enter the discussion?
Replacement becomes a separate question when a component is worn, damaged, unsuitable for the intended operation, or not a candidate for the proposed keying change.
Describe symptoms rather than diagnosing the part. Mention a loose handle, a key that catches, or a door that needs lifting before the key turns. The cylinder may be involved, but the frame, hinges, latch, or strike may also need attention.
A change in how the space is used can also lead to a hardware review. That decision should include the opening's operating requirements, not just the missing key.
What should you have ready for the visit?
Gather the information that connects the access question to the physical opening. For a managed property, include the person who controls shared-door decisions.
- Photos of both sides of each relevant door and its frame.
- Available keys and their known door assignments.
- A description of missing keys and any operating problems.
- The intended recipients of the new keys.
- Any existing master key arrangement or related electronic entry system.
After the decision, agree on key distribution. Choose who issues keys, who keeps spares, and how changes in occupancy or staffing will be handled. A new key arrangement still needs someone responsible for it.
Common questions
Does one missing key mean every lock must change?
No. First establish which cylinders the key operates. A master key can involve several openings, while an individual key may have a narrower role. That map guides the discussion.
Can a rekey fix a sticking door?
Rekeying changes key operation inside the cylinder. It does not reposition the door or adjust its hinges. Explain the sticking so the mechanical cause can be examined.
What should a tenant do before changing a lock?
Establish who can approve the work and whether the lock participates in a shared key arrangement. Permission for an individual space and responsibility for a common entrance are different matters.