

Commercial · Mississauga
Commercial Rekeying in Mississauga
You have just signed the lease on a unit the previous tenant ran for a decade.
In plain words
Losing a master key exposes every door it opened, and a commercial rekey brings that exposure back to zero. The locksmith first works out which level the missing key sat at: a single change key affects one or two cylinders, while a master reaches every lock in its group. Only the affected cylinders are repinned, which keeps the rest of the system intact and the response proportionate. Where a keying chart exists the work is precise; where the chart has been lost, the visit begins by reading and recording the existing cylinders so the new plan starts from facts rather than memory.
How the visit goesThe manager's key ring went missing somewhere between the bank and the car, and the master on it opened every door in the building. Until the cylinders are changed, whoever finds it is holding the run of the place.
Commercial Rekeying
How the visit goes


Which doors are the landlord's
In a plaza, an office building or a multi-tenant industrial unit, some doors on your floor plan are not yours to rekey. Corridor doors, electrical and mechanical rooms, shared loading doors and the building's fire exits usually sit on the landlord's master system, and a suite entrance may be required to accept the landlord's key as well as yours. The locksmith sorts the openings into two columns before starting: those the lease puts under your control, which get the new plan, and those that stay as they are or need the property manager's say-so. Where a suite door must accept both a tenant key and the building master, it is pinned to do exactly that.
Retiring the old keys
The job is finished when the old keys are proven dead, not when the new ones work. At every rekeyed opening the locksmith tries a sample of the old keys, including the master if one existed, and confirms that each one enters the keyway and turns nothing. The collected old keys are then cut through with snips in front of the manager and can be handed back as scrap or taken away. Any door deliberately left on its original key is written on the chart in plain words so nobody assumes it changed. That last check is what turns a day of brass work into a genuine reset of who can open the business.
A routine for the next departure
Turnover stops being a security event once there is a procedure for it. When someone leaves, their key is collected against the register and ticked off; if it cannot be produced, the chart shows exactly which cylinders that key opened, and only those are dealt with. Businesses that chose interchangeable cores can go further: the manager takes the control key from the safe, swaps the affected core for a spare in less time than a coffee break, and the locksmith repins the removed core at leisure for the next time. Either way the response is measured and specific, and the front door is never left answering to a key that walked out with a former employee.
Commercial Rekeying
In the van
Cylinder removal and spanner tools
Commercial pin kit
Key stamp set and tags
Interchangeable cores and control key
Dry graphite or PTFE lubricant

Commercial Rekeying
What affects the quote
A master key plan
Pinning cylinders to accept both a change key and a master, and designing the chart so no key opens a door it should not, is more work per cylinder than keying everything alike.
Upgrades chosen on the day
Some businesses use the visit to move to interchangeable cores, add a lockbox for the alarm company or fit a heavier cylinder on the cash room. Each is a separate line you can accept or leave.
Doors out of alignment
A door whose cam, strike or closer needs adjusting so the freshly rekeyed cylinder throws the bolt fully is corrected during the visit, and that adjustment is a separate item.
What to have ready
- Can you gather every existing key so they can be read on site?
- Do you want one key for everything, or separate groups with a master?
- Which staff need to open which doors on a normal day?
Commercial Rekeying: questions
QuestionsHow do you confirm I am allowed to have the locks changed?
For a business the locksmith looks for someone with standing: the owner, a director, or a manager who can show written authority from one of them. A lease, a business registration or a letter on company paper usually settles it, along with photo identification. Where doors belong to a landlord, the property manager's approval is asked for as well. This is a short step and it protects the business from having its own locks changed by the wrong person.
Can all our doors be put on a single key?
Yes, if the cylinders share a keyway or can be fitted with ones that do. Keying everything alike is popular with small shops because staff carry one key and spares are simple. The trade-off is that one key then opens the cash room as readily as the front door. Many businesses choose a middle path: the doors everyone uses on one key, the sensitive rooms on another, and an owner's master that opens both.
What happens with our fire exit doors and panic bars?
The outside cylinder on an exit door controls entry only, and it can be rekeyed like any other. The inside stays as it must: one push or one turn, no key, no special knowledge, on the exit door itself and on any door on the way to it. A locksmith will not add a keyed device to the inside of an exit, and will point out one if it already exists.
Related services

- Access Control InstallationThe keypad on the side door has started sticking on cold mornings, codes get shared instead of reset, and half the staff still remember a code you meant to retire two hires ago.
- Panic & Exit HardwareThe new access-control reader at the staff entrance works fine going in, but nobody has sorted out the door's exit side, and right now a card reader and a pushbar exist as two separate ideas.
- Commercial-Grade Lock ReplacementThe kitchen delivery door gets shouldered open more than a hundred times a shift, and lately the latch slips past the strike plate instead of catching it on the first push.