That is the useful idea behind rekeying. With suitable hardware, the parts that match a key can be changed so a new key works and the old one no longer does. The handle and much of the lock can stay where they are.
It can make sense after a move, a missing set or a change in who should have access. Rekeying isn't the answer to every lock problem, though. A worn cylinder, damaged latch or door that won't line up needs attention beyond changing the key.
Count the locks, not just the doors
One door may have a keyed handle and a separate deadbolt. Another entrance may use a different system altogether. Make a short list of the locks you want assessed, with a note about which key currently works in each.
For a home, include the entrance you use from a private garage if it has its own key. At a small business, include the rear or staff door rather than only the public entrance. Our residential and commercial pages explain the different access questions behind those lists.
One key is convenient when the hardware allows it
Locks have different keyways and internal designs. They can't all be made to accept one everyday key simply because they sit in the same property. The existing hardware needs to be checked before a shared-key arrangement is promised.
A master key plan is a different choice from giving every lock the same key. It can allow one key to open a larger group while other keys open fewer doors. That takes a clear access plan, not just a request for fewer keys on a ring.
The key change won't straighten the door
A bolt that catches the frame may remain awkward after rekeying. If you've been lifting the door or pulling it hard, include that history. A repair assessment can separate the fit of the door from the condition of the keyed parts.
It's worth keeping a working key available if you have one. If none remains, explain that when discussing the job. Don't throw away usable hardware or order replacement cylinders before the setup is understood.
A unit door isn't the whole building's key system
In a Jersey City apartment, the common entrance may be managed separately from your own lock. Work out who controls each door before arranging a change. A management-issued fob belongs to another access process and isn't rekeyed like a mechanical cylinder.
Once the work is complete, test the new key in every lock included in the job. If the aim was to retire old keys, confirm the change as well. Keep a labelled spare apart from the key you carry. The apartment key guide helps organize that handover.
Keep the quote tied to the list
The number of cylinders, their condition, whether working keys are available and any extra copies affect the work. Compare estimates against the same list rather than treating every request to rekey a home as identical.
A couple of useful questions
Is rekeying the same as replacing a lock?
No. Rekeying changes which key operates suitable existing hardware. Replacement involves changing hardware. Repair may also be needed if parts are worn or the door doesn't work properly.
Will rekeying cancel a lost building fob?
No. A managed electronic credential must be handled through the system's administrator. Rekeying a mechanical lock doesn't remove an electronic fob's permissions.