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

Locks for shops, offices and buildings: rekeying at turnover, commercial-grade hardware, exit devices, master key systems and access control.
Office managers, franchise owners, property managers and shopkeepers all come through the commercial pages. The work is the same trade as residential locksmithing, but the hardware is heavier, the keying is planned and the paperwork matters more.
Commercial RekeyingThe manager's key ring went missing somewhere between the bank and the car, and the master on it opened every door in the…
Master Key System DesignA property manager taking over a small commercial building inherits a shoebox of keys with no labels and no chart.
Access Control InstallationThe team has grown past the point where one shared key still makes sense.
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…
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…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
On-site assessment preferred · (289) 367-6857, open 24/7