

Commercial · Hamilton
Commercial Rekeying
The manager's key ring went missing somewhere between the bank and the car, and the master on it opened every door in the building.
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 goesA key turned up in the parking lot with the shop's name on its fob. It came back to you, which is lucky, but it means keys are leaving the building on rings you have never seen, and the shop's locks have not changed since opening day.
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.
Cutting and marking the new keys
Keys are cut to the new combinations on a code machine rather than traced from another key, so every copy is exact and the tenth key fits as cleanly as the first. Each key is stamped with a short code that means something only on the keying chart; the business name, the address and the word for the door it opens stay off the metal, so a lost key gives nothing away. Keys are counted out by group, tagged, and listed against the names of the people who will carry them. Where the plan uses a restricted keyway, the blanks are drawn against the authorization letter, and that letter is filed with the chart for future orders.
Keys counted into named hands
Alongside the chart comes a key register: each key's stamped code, the person it was issued to, the date, and a line for the date it comes back. Filling it in as keys are handed out on the first morning takes ten minutes and pays off at every departure afterwards, because the question becomes 'return key A-07' rather than 'did she have a key?'. Spare keys are counted too and kept somewhere locked rather than in the drawer where the old tangle lived. When the register and the chart agree with the keys on the hook, the business knows exactly who can open it, which is the whole point of the exercise.
Commercial Rekeying
In the van
Master pins
Rekeyable padlocks
Commercial pin kit
Key gauge and decoder
Plug follower

Commercial Rekeying
What affects the quote
After-hours or split visits
Work done after closing, before opening or split across two visits to suit trading hours costs the same amount as a single daytime block. The exact figure is confirmed on site once the number of cylinders and the keying plan are known.
Restricted keyway
Moving to a patented, restricted keyway means new cylinders or cores rather than a repin of the old ones, and the blanks themselves carry a higher price than standard keys.
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
- Are any cylinders stiff, loose or hard to turn at the moment?
- Which staff need to open which doors on a normal day?
- How many doors, padlocks and cabinets do you want included, and where are they?
Commercial Rekeying: questions
QuestionsWe are a landlord with a tenant leaving. When should the unit be rekeyed?
Between tenants is the ideal moment: the departing tenant has handed back their keys, the new one has not yet received any, and the unit is empty for the work. The incoming tenant then starts on keys nobody else has held, and the landlord's own master or emergency key is set up at the same time. Where a lease has ended in dispute, the locksmith asks to see the paperwork before changing locks on a unit that still holds a tenant's goods.
What do you do with the old keys?
They are gathered, tested at each rekeyed door to confirm they no longer work, and then cut through so they can never be used or copied. You can keep the pieces or the locksmith takes them away. Any old key that still operates a door you chose to leave unchanged is handed back and noted on the chart, so it is clear which keys remain live and which are scrap.
Can the work be done while we are open?
Yes, and many businesses prefer it. The locksmith works one door at a time, finishing and testing each before starting the next, and leaves the main entrance until a quiet moment or until after closing. Doors staff are using are done last and their new keys are handed over first. Where a business would rather nobody sees the work, an early morning or after-hours window is arranged instead.
Related services

- Access Control InstallationThe back door of the shop runs on one key, and by now it lives on six different rings: yours, two managers, a cleaner, a supplier who restocks early, and a keyholder nobody quite remembers approving.
- Panic & Exit HardwareThe fire inspector's note is blunt: the banquet hall's second exit still turns on a deadbolt, and the crowd it is rated to hold needs a door that opens under one motion, no key involved.
- Commercial-Grade Lock ReplacementAn inspection report flagged the rear exit as needing hardware that opens with one motion and no key, and that door currently has an ordinary keyed knob on the inside.