A new home usually comes with old keys. Builder keys, previous-owner keys, copies held by relatives, cleaners, contractors, neighbors, and agents can all still exist. That does not mean the house is unsafe, but it does mean you do not fully control who has access until the locks are addressed.
The two common options are rekeying and replacing. They sound similar, but they solve different problems. Rekeying changes the lock cylinder so old keys stop working. Replacing removes the hardware and installs a different lockset or deadbolt.
When rekeying is the better choice
Rekeying is usually the right move when the existing locks work smoothly, feel solid, and match the level of security you want. A locksmith changes the pins inside the cylinder so a new key operates the lock and the old key no longer does. The door hardware stays in place.
This is common after buying a home in Lawrenceville, Dacula, Grayson, Suwanee, or anywhere nearby where the locks are still in good condition but key control is uncertain.
- You just moved in and want old keys retired.
- The lock hardware works well and does not need to be replaced.
- You want several compatible doors keyed alike.
- You lost a house key and do not know where it went.
When replacement makes more sense
Replacement is the better choice when the lock is damaged, worn out, corroded, loose, mismatched, or not the style you want. If the deadbolt drags, the latch does not seat correctly, or the lock has been forced, rekeying alone may not solve the problem.
Replacing is also the right time to upgrade hardware, add a deadbolt, or switch to a keypad or smart lock if the door is compatible.
- The lock sticks, spins, or feels loose.
- The door has no deadbolt and needs one added.
- You want a keypad or smart lock installed.
- The existing lock has damage from a break-in attempt or heavy wear.
What a locksmith checks on site
A good residential locksmith does not choose rekey or replace from a script. The door, strike plate, lock condition, keyway, and alignment all matter. Sometimes a lock feels bad because the door is sagging or the strike plate is misaligned, not because the cylinder itself is bad.
That is why the best answer often comes after the hardware is inspected. If the locks are compatible, many homeowners also choose to have the front, back, garage entry, and side doors keyed alike during the same visit.
The practical recommendation
If you just bought a home and the locks are in good shape, start with a rekey. If any exterior lock is damaged, unreliable, or below the security level you want, replace that hardware while rekeying the rest. This keeps the project practical without replacing parts that still work.
Common Questions
Should I rekey every exterior door after buying a house?
Yes, it is usually a smart first step. Rekeying gives you control over who has working keys without requiring all new hardware when the existing locks are still good.
Can several home locks be changed to use one key?
Usually, yes, as long as the locks are compatible. A locksmith can confirm compatibility on site and key matching locks alike during the same visit.
Is replacing locks more secure than rekeying?
Not automatically. Rekeying a solid lock restores key control. Replacement is better when the hardware is worn, damaged, poorly installed, or not secure enough for the door.