

Change or rekey · Toronto
Lock Rekeying
The whole key ring went missing somewhere between the grocery store and the bus.
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 whole key ring went missing somewhere between the grocery store and the bus. You got back in with the spare, but a set of keys is out there, and you would sleep better knowing they open nothing.
Inside the lock
What a rekey changes


01
The lock you already have

02
Inside the cylinder

03
Pins, springs and the shear line

04
A new key, new pins
Lock Rekeying
How the visit goes


Reading the keyway on each lock
Whether several doors can share one key depends on the cylinders, not the number of doors. Each lock has a keyway, the profile a key must match to enter the plug, and only cylinders with the same keyway can be pinned to the same key. The locksmith looks at the face of each cylinder and the profile of each existing key to sort the house into families. Most homes carry one or two of the common residential keyways, sometimes with an odd one on a side door or a padlock. Anything from a different family is noted so you can decide whether to swap that cylinder for a matching one and bring the door onto the house key.
Proving the old keys are finished
The last operation at every door is the test that matters most. The locksmith turns the new key from outside and inside with the door open, then closed, and confirms the bolt throws fully and draws back cleanly. Then the old key is tried in the same cylinder and must turn nothing. This is repeated at every rekeyed door, because the door that gets skipped is the one an old key still opens. Spares cut from the new pinning are tried in every lock they are meant for. The old keys, now just shaped brass, are collected or handed back to you for the recycling bin.
New keys, counted and tried in every door
You finish the visit holding the only keys that work, and you know exactly how many there are. The locksmith cuts the agreed number from the fresh pinning rather than copying one from another, so each is as true as the first, and tries every one in every door it should open before handing them over. Count them, decide who in the household gets one, and put the spare somewhere you will remember. If a door was left on a separate key on purpose, that key is tagged so it does not get mixed into the house set. The whole set fits comfortably on one ring.
Lock Rekeying
In the van
Pinning tweezers and tray
Replacement cylinder for odd keyways
Cylinder shim
Key tags and keying record
Retaining clip tool

Lock Rekeying
What affects the quote
One key group or several
Keying every door alike is the simplest plan. Setting up separate keys for a basement suite, an office or a shed adds a group to pin and label, and the quote shows that as separate work.
Interior doors added to the plan
Bedroom, office or storage-room locks brought onto a key are lighter work than exterior deadbolts, but each is still a cylinder to pin and test, and the count includes them.
Condition 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.
What to have ready
- Do you own the home, rent it, or manage it for someone else?
- Has a key gone missing, or is one still held by someone who has moved on?
- Is there a shed, gate, mailbox or padlock you would like on the same key?
Lock Rekeying: questions
QuestionsCan I keep one door on a different key from the rest?
Yes, and it is common. A basement suite or in-law apartment often gets its own key so the tenant's key opens their door and nothing else, while your key opens the main house. A home office, a storage room or a shed can be kept separate for the same reason. The locksmith sets up the groups you want, pins each accordingly and tags the keys so the separate one is not mixed into the household set.
Will I need to prove I own or rent the home?
Yes, and it is a welcome part of the job. Rekeying decides who can enter, so the locksmith confirms the person asking has the standing to make that decision. For an owner that means photo identification alongside a document that links them to the property, for instance a property tax notice or the closing statement. A manager brings the owner's written authorization. A tenant mentions that the landlord has agreed and will be given a key, since tenancy rules here expect both to hold one.
My house is older and has a mortise lock. Can that be rekeyed?
Yes. A mortise lock, the kind with a large case set into the edge of the door, uses a threaded cylinder held by a set screw reached from the door's edge. The cylinder unthreads, is pinned like any other and screws back in. Where a very old lock uses a bit key or a lever mechanism instead of a pin cylinder, the locksmith will explain the options, which may include fitting a modern cylinder into the existing case so the door keeps its original hardware.
Related services

- Lock Replacement & UpgradeSomeone tried the back door while you were away.
- Vintage Mortise Lock ServiceThe knob flops loose on its spindle and never springs back to level.
- Smart Lock InstallationYour mother still lives on her own, and the personal support worker, the pharmacy delivery and two siblings all need to get in on different days.