Can Locks Be Rekeyed Twice? What to Know
A tenant moves out, an employee leaves with a key, or a spare key goes missing. You rekey the lock to restore control, then a few months later another situation comes up. Naturally, you may ask: can locks be rekeyed twice? In most cases, yes. A quality, serviceable lock can usually be rekeyed more than once without replacing the entire lock.
The better question is whether the lock is still in good condition and whether rekeying is the right security move for your situation. A second rekey can be a practical, affordable way to make old keys stop working. But it will not fix worn hardware, a damaged cylinder, or a lock that no longer provides the level of protection your property needs.
Can Locks Be Rekeyed Twice Without Problems?
Most standard residential and commercial keyed locks are designed so the internal keying can be changed. Rekeying does not mean installing a new lock on the door. A locksmith removes the lock cylinder, changes the small internal pins or wafers that match the key cuts, and creates a new working key combination.
That process can generally be repeated. In fact, rental homes, offices, retail spaces, and other properties with changing occupants may have their locks rekeyed several times over the life of the hardware. The outside trim and much of the lock mechanism stay in place, while the key combination changes.
A lock does not have a fixed “two rekeys only” limit. Its practical limit depends on its condition, construction, and the quality of prior work. A well-made deadbolt that operates smoothly may be rekeyed again years later. A bargain-grade knob lock that is loose, sticking, or heavily worn may be better replaced rather than serviced again.
When a Second Rekey Is a Good Choice
Rekeying again makes sense when your concern is key control, not a hardware failure. For homeowners, that may mean you gave a key to a contractor and are unsure whether copies were made. For a property manager, it may mean turning over a unit between tenants. For a small business, it may mean changing access after staffing changes or a lost master key.
A second rekey is often the right choice when the following are true: the lock works properly, the door closes and latches correctly, the existing hardware is appropriate for the door, and you simply need previous keys disabled.
It can also simplify your key setup. If the front door, back door, garage entry, and side gate use different keys, a locksmith may be able to rekey compatible locks so one new key works across several doors. That convenience is useful, but compatibility matters. Not every brand, keyway, or type of lock can be keyed alike.
For businesses, rekeying can be part of a broader access plan. A locksmith can set up a master key system so individual employees have keys for designated doors while management has access to more areas. If keys change hands frequently, it is worth reviewing whether a traditional key system still fits the business or whether electronic access control would provide better tracking and control.
What Can Prevent a Lock From Being Rekeyed Again?
The biggest limitation is not how many times the lock has been rekeyed. It is the condition of the lock cylinder and the rest of the door hardware.
Pins, springs, wafers, and keyways experience wear over time. Dust, corrosion, poor lubrication, and repeated force can make a lock difficult to turn. A key that must be jiggled, pushed hard, or pulled back slightly to work is a warning sign. Rekeying may change the key combination, but it does not rebuild every worn internal part or correct a misaligned door.
Some locks also cannot be rekeyed in the conventional way. Certain low-cost locks have non-serviceable cylinders. Many electronic deadbolts use physical backup keys, but their mechanical cylinders may have different service requirements. Older locks, specialty hardware, mailbox locks, cabinet locks, and high-security cylinders can require specific tools, parts, or replacement cylinders.
A lock may also be a poor candidate for rekeying if it has been damaged during a break-in attempt, drilled, forced, or exposed to severe weather. In those cases, replacing the lock can be the safer route. The goal is not just to make an old key stop working. The door needs to lock reliably every time.
Rekeying Does Not Fix Door or Lock Problems
It helps to separate a key-control issue from a mechanical issue. If an unauthorized person may have a key, rekeying addresses that concern. If the bolt will not extend fully, the latch rubs the strike plate, or the deadbolt binds when the door is closed, the problem may involve alignment, the strike, the door frame, or worn internal hardware.
A professional inspection can identify the cause before work begins. Sometimes a simple adjustment and rekey is enough. Other times, new hardware is the more sensible long-term solution.
Rekey or Replace: How to Decide
Rekeying is usually preferred when your locks are in solid working order and you want new keys. Replacing is often preferred when the hardware is damaged, outdated, low quality, or no longer meets your security needs.
For example, a homeowner who has just purchased a house may choose to rekey good deadbolts immediately. There is no reliable way to know how many copies of the old keys exist. On the other hand, if those deadbolts are loose, corroded, or paired with weak door hardware, a lock upgrade may make more sense than putting new pins into old equipment.
Commercial properties have additional considerations. A second rekey might be enough after an employee departure, but a business with frequent turnover could benefit from a restricted keyway, a master key system, or access control. Those options can reduce the confusion that comes from copying keys and manually changing locks after every staffing change.
For rentals, state and lease requirements can also affect the decision. Property managers should maintain reliable, secure locks and keep a clear record of who receives keys. Rekeying between occupants is often a straightforward way to reset access, provided the hardware remains in good condition.
Why Professional Rekeying Matters
Rekeying looks simple from the outside, but the tolerances inside a cylinder are precise. The new pins must match the new key correctly, and the lock must be reassembled and tested so it turns smoothly. An incorrect pin setup can leave a key sticking, a cylinder turning roughly, or a lock failing when you need it.
Professional service is especially valuable if you have multiple doors, need one-key convenience, use commercial hardware, or want to preserve a master key system. A locksmith can determine what can be rekeyed, identify incompatible hardware, and make sure the new keys work consistently before leaving.
If you are in Aurora, Federal Heights, Denver, or a surrounding Colorado community, BS Locksmith can inspect your hardware on-site and help you decide whether another rekey or a lock replacement is the better fit. That is useful after a move, lost key, employee change, tenant turnover, or any event that puts your key control in question.
A Few Smart Steps After Rekeying
Once a lock has been rekeyed, treat the new keys as part of your security plan. Keep track of who receives them, avoid hiding spare keys outside, and retrieve keys when contractors, tenants, or employees no longer need access. If you have several doors, label keys carefully until you know which key operates each lock.
It is also a good time to check the door itself. Make sure the deadbolt reaches fully into the frame, the strike plate is secure, and the door does not sag or bind. Good locks work best when the door, frame, and hardware support them.
A second rekey is usually a normal maintenance decision, not a sign that you waited too long. If the lock turns smoothly and still suits the door, changing the key combination can restore control quickly. If it shows wear or no longer meets your security needs, replacing it now can prevent a bigger problem later.