The short answer
Rekey when the existing locks are compatible, secure, and working well but you need old keys to stop working. Replace the hardware when it is damaged, worn, poorly matched to the door, or you want a different function, finish, security level, or keyless option. If the door only locks when you lift or pull it, diagnose the alignment too—neither rekeying nor a new cylinder fixes a binding door by itself.
- Rekeying changes which key operates a compatible lock; it does not make worn hardware new.
- Replacement makes sense for damage, incompatibility, or a desired hardware upgrade.
- Test the latch and deadbolt with the door open before deciding what the opening needs.
What rekeying actually changes
During rekeying, a locksmith changes the cylinder’s internal pin combination and cuts keys to match. The lock body stays on the door, and previously working keys should no longer operate that cylinder. This is useful after a move, a lost key, a roommate change, or employee turnover. The existing hardware still needs to be in serviceable condition, and cylinders must be compatible if you want several locks to use one new key.
- The old key stops working after the cylinder is rekeyed and tested.
- The lock’s exterior appearance and basic security grade stay the same.
- A broken latch, loose handle, or misaligned strike may need separate repair.
When replacement is the more useful choice
Choose replacement when the lock is corroded, cracked, unreliable, or no longer suits the opening. Replacement also lets you change from a keyed knob to a deadbolt-and-lever arrangement, coordinate finishes, or install a keypad deadbolt. For a smart lock, check the door thickness, bore holes, backset, deadbolt travel, and battery access before buying. A new lock cannot operate smoothly if the door and frame are preventing the bolt from moving freely.
A five-minute check before you call
Open the door and slowly extend and retract the latch or deadbolt. Repeat with the door closed without forcing the key. If it works while open but binds while closed, note that detail for the locksmith. Count the locks you want changed, photograph the edge of the door and the existing keyway, and note whether one key currently operates every lock. These details help distinguish a key-control job from a door-repair or hardware-replacement job.
- List every door, including the garage entry and any outbuilding.
- Keep one working key available if you have it, but do not force a sticking lock.
- Ask whether rekeying, repair, replacement, or a combination is being recommended.
What to ask in the estimate
Ask whether the price includes the service call, labor per cylinder, new keys, parts, and any door-alignment work. If you are comparing options, request the rekey and replacement scopes separately so you understand what changes. After the work, test each new key with the door both open and closed, confirm old keys no longer operate rekeyed locks, and keep an itemized receipt.
Questions about this topic
Is rekeying cheaper than replacing every lock?+
It often requires fewer new parts, but the total depends on the number and condition of cylinders, key compatibility, and any repair the door needs. Ask for a job-specific estimate rather than assuming one option is always less expensive.
Can all my house locks use one key after rekeying?+
Many compatible locks can be keyed alike. Different keyways, damaged cylinders, or incompatible hardware may prevent it. A locksmith can check the existing keyways before recommending the setup.
Does rekeying fix a deadbolt that sticks?+
Not by itself. Rekeying changes the key combination. A sticking bolt can involve door alignment, the strike, latch, weather stripping, or worn hardware and should be diagnosed separately.
Need service rather than general advice? Read about our residential locksmith service in the Minneapolis metro or call 763-238-4915.
Need help with your specific situation?
Call with your Minneapolis-area location and the lock, key, or vehicle details.
