
Change or rekey · Hamilton
Lock Rekeying
The previous owners left a coffee tin of keys on the counter, some labelled, most not. The house is yours now, but you have no idea how many copies were cut over the years or who still has one in a drawer somewhere.
Lock Rekeying
In plain words
A rekeying visit follows a straightforward order. First the locksmith confirms you are entitled to change the locks, which for an owner is identification and for a tenant includes the landlord's agreement. Next comes a walk around the house to list every door to include, read the keyway on each cylinder and check its condition. The cylinders come out one at a time, are pinned to the new key and go back in. Every door is then tested with the new key and with the old one, spares are cut and tried in each lock, and you receive a note of what was done.
How the visit goesThe previous owners left a coffee tin of keys on the counter, some labelled, most not. The house is yours now, but you have no idea how many copies were cut over the years or who still has one in a drawer somewhere.
Hamilton
How the visit goes
Smart locks and user-rekeyable cylinders
Modern hardware gets its own look. Many keypad or app-controlled deadbolts have a conventional override cylinder behind a cover that can be rekeyed to the house key so the backup key is not a stranger on your ring, though some models are key-free and use an external battery backup instead. Some residential cylinders are designed to be reset by the owner with a small tool and a working key; the locksmith checks whether one has been reset correctly and whether it accepts the new key. Where a smart lock is being kept, codes are reviewed at the same time so a departed keyholder's code goes the way of their key.
Bringing several doors onto one key
Keying doors alike is the same operation repeated with the same new key. Once the first cylinder is pinned and proven, the locksmith removes the second, follows the plug out, and loads bottom pins to the identical depths so the same key operates it, and so on around the house. Where a door carries a cylinder from a different keyway family, that cylinder is exchanged for a matching one in the same finish and then pinned to the house key. The result is one key on your ring that turns every exterior door, with the individual locks unchanged in appearance and function.
Knowing when to rekey again
Rekeying is not a once-in-a-lifetime event; it is a habit tied to changes in who holds keys. The moments to think about it are the same ones that brought you here: a move, a tenant or roommate change, a key lost with anything identifying the address, a contractor who has finished, or a relationship that has ended. Between those events there is nothing to schedule. Because the house is now on a known system with a record, a later rekey is a shorter visit, and any new lock you add along the way can be pinned to the existing key so the household never drifts back to a ring full of mismatched keys.
Lock Rekeying
In the van
- Cylinder shim
- Graded bottom pin kit
- Code cutter or key duplicator
- Reset tool for user-rekeyable cylinders
- Pinning tweezers and tray
What affects the quote
Same fees day, night or weekend
1Condition of the existing cylinders
A clean cylinder is repinned as it is. One with collapsed springs, a plug packed with old oil or a worn housing needs service or replacement while it is apart, and that shows separately.
2Smart lock override cylinders and codes
Pinning the backup cylinder of a keypad or app lock to the house key is a small extra task, and reviewing or deleting user codes at the same time is another, each named in the quote.
3Type of lock on each door
A standard deadbolt, a knob or lever set, a mortise lock in an older door, a padlock and a smart lock's override cylinder each come apart differently and take different time on the bench.
Lock Rekeying: questions
What happens to my old keys?
They become ordinary pieces of brass. Once the cylinders are pinned to the new combination, the old keys turn nothing on your property, so there is no security reason to keep or hide them. Hand them to the locksmith for disposal or drop them in the metal recycling. If a former roommate or contractor still has one, it no longer matters, which is the whole reason for the visit. Keep only the new set, counted and tagged.
How many new keys will I get, and can I get more later?
As many as you ask for, cut on site from the fresh pinning and tested in each door they should open; two or three is typical for a household. More can be cut later. When you do, bring one of the locksmith's originals to be copied rather than a copy of a copy, since every generation strays slightly from the intended depths. If any key is a restricted type, additional copies come from the record kept for that system rather than from a hardware store.
How is rekeying different from replacing the lock?
Rekeying keeps your existing deadbolt or handle set and gives it a new key, commonly by changing the pins inside, though some cylinders reset a different way. Replacing removes the whole lock or cylinder and fits new hardware. Rekeying suits locks that are in good condition and simply need a fresh key. Replacement is the better call for hardware that is worn or damaged, built to a low grade, on a keyway the other doors cannot share, or due for a change of style or a keypad.
Change or Rekey Locks

- Lock Replacement & UpgradeThe century home's original mortise lock takes a key the size of a spoon, sticks in humid weather…
- Vintage Mortise Lock ServiceThe knob flops loose on its spindle and never springs back to level.
- Smart Lock InstallationThe deadbolt is a stiff double-cylinder model that needs a key from both sides, and in the dark…
Lock Rekeying near you
Think of this as the workshop list for Hamilton. Emergency lockouts and key extraction. Rekeying after a move or a staff change. Lock replacement and deadbolt installation. High-security cylinders and reinforced strikes. Commercial hardware, closers and master keys. Safe opening and service. Key cutting for house and car.