If You just got the keys to a house you bought.
Then Rekey every exterior door to one new key.
The seller, their agent and any tradesperson who held a copy are now locked out, and you carry a single key. Lock Rekeying

A deadbolt is only as strong as the hole it was bored into and the plate it throws into. In Oshawa we install new deadbolts on doors that have never had one, replace worn units on doors that have, and set the strike so the bolt slides home without lifting or leaning on the door.
Same fees day or night · Oshawa
Pick the closest, or call (289) 367-6857
Lockout ServicesLocked out of a home or business, a key snapped in the lock or a lock that has seized: entry with the least damage…
Change or Rekey LocksNew keys for the locks you have, or new locks where the hardware has worn out: rekeying, replacement, deadbolts, smart…
High Security LocksCylinders and deadbolts built to resist picking, bumping and drilling, keys that cannot be copied without…
Commercial LocksLocks for shops, offices and buildings: rekeying at turnover, commercial-grade hardware, exit devices, master key…Before a locksmith opens any door in Oshawa, he asks to see that it is yours: a piece of identification, a lease, an ownership paper, or a neighbour who can vouch. Most people are relieved by the question. The rest of the visit follows the same habit of care: explain each step, leave the frame and finish as we found them, and make sure the keys in your hand are the only ones that work.
Nearby Columbus
Locks, keys and doors, done properly.
32 years in business · Call and tell us about the door: (289) 367-6857
Oshawa
Choose a service to see how it works in Oshawa. Each page explains the situation it suits, what the locksmith looks at first, how the job is done, and how to look after the hardware afterwards. If your problem sits between two services, either page will get you to the right conversation.

Panic & Exit Hardware, Mailbox Lock Replacement, Vehicle Lock Repair, Safe Installation & Servicing…
Tap a situation. The answer opens here.
If You just got the keys to a house you bought.
Then Rekey every exterior door to one new key.
The seller, their agent and any tradesperson who held a copy are now locked out, and you carry a single key. Lock Rekeying
If You are renting, and the landlord says the locks were never changed.
Then Ask the landlord to have the locks rekeyed.
Tenants generally need the owner's agreement, and most landlords are glad to do it when asked plainly.
If A tenant moved out and did not return every key.
Then Rekey before the next tenant arrives.
It keeps the same hardware and closes the gap before viewings start. Lock Rekeying
DurhamOntario
Every square is one home in a hundred.
It helps to know which gate or door is affected, roughly how old the lock or closer is, and what exactly is happening: dragging, slamming, refusing a key, or a buzzer that stopped releasing the door. If the entry is shared, a rough idea of how many households or units currently need a working key speeds up the visit considerably. For a building entry, having contact information for a property manager or condo board on hand is useful if a decision needs their sign-off.
Almost always, only the lock: the small cylinder and its cam come out, and a matching replacement goes into the same hole in the same compartment door. The mailbox itself, the door, and the surrounding panel stay exactly as they were. A full compartment door or panel is only replaced when it has been damaged beyond a simple lock swap, and that would be discussed separately before any work begins.
Anchoring leaves small holes at the anchor points, sized to the bolts being used, and on a finished floor these sit under the safe itself where they are never seen again. On tile, the risk of cracking nearby tiles is real enough that an alternative fastening point or a different spot in the room is often chosen instead of drilling straight through the tile itself.
It needs a plug that rotates without catching, pins that return under their springs, and a face free of heavy corrosion or cracks. Most commercial cylinders in daily use pass easily. Ones that are stiff, gritty or green with salt bloom can sometimes be cleaned and repinned, and the locksmith will say when a replacement for that door is the better value; the rest of the doors are rekeyed regardless.
On-site assessment preferred · (289) 367-6857, open 24/7