Whether you’ve just moved into a new home, ended a lease with a tenant, or had a set of keys go missing, one question comes up often: should you rekey your locks, or replace them entirely? Both options improve your security, but the right choice depends on your situation, goals, and budget. In this post, we’ll break down the differences between rekeying and replacing locks, the pros and cons of each, and how to determine which solution is best for your home or business.
What Is Rekeying?
Rekeying a lock means changing the internal pins of the lock cylinder so that it works with a new key—and only that new key. The physical lock hardware stays the same, but any old keys will no longer operate it. A locksmith removes the lock, disassembles the cylinder, and resets the pin configuration using a different key cut.
This option is ideal when the lock itself is still in good shape and you simply want to change who has access to it. Rekeying is commonly done after moving into a new home, after employee turnover, or when a key has been lost or stolen.
What Is Lock Replacement?
Replacing a lock involves removing the entire lock and installing a brand-new one. This could be a similar model to what was there before or a completely different type of hardware, like upgrading a basic lock to a high-security deadbolt or a smart lock.
Lock replacement is a good choice when the hardware is old, damaged, outdated, or when you’re looking to upgrade to a different locking system altogether. It’s also the right solution when the existing lock doesn’t meet your current security needs or code compliance requirements for commercial spaces.
When Should You Rekey?
Rekeying is a cost-effective and efficient option in several common scenarios:
You just moved into a new property.
Even if the previous owner or tenant returned their keys, you can’t be sure who else had a copy. Rekeying gives you full control over access without having to replace every lock on the property.
You’ve lost a key or had one stolen.
If you can’t account for where your key is, it’s better to be safe than sorry. Rekeying prevents any old keys from working and gives you peace of mind.
You want to match multiple locks to one key.
If you have different keys for your front door, back door, and garage, a locksmith can rekey them all to match a single key—provided the locks are compatible.
An employee or tenant has moved out.
Rekeying is a smart way to reset access without replacing commercial lock hardware or door handles entirely. It’s especially helpful for high-turnover properties or offices with multiple staff changes.
When Should You Replace Your Locks?
Replacing your locks is the right move in situations like these:
The lock is damaged or worn out.
If your lock sticks, wobbles, rusts, or is physically broken, rekeying won’t solve the problem. New hardware will improve both function and security.
You want to upgrade your security.
Maybe you’re switching to a pick-resistant deadbolt or installing an electronic keypad. New locks are the only way to introduce new features and modern tech into your system.
You’re going through a major renovation or remodel.
Aesthetic changes may call for new hardware to match updated doors or décor. This is a great time to consider better security options too.
You want to switch keyways or lock brands.
If you’re upgrading all your locks to a high-security brand or specific key system, rekeying won’t apply. New lock hardware ensures uniformity and better access control.
Cost Comparison: Rekeying vs. Replacing
One of the biggest differences between rekeying and replacing is cost. Rekeying is typically more affordable since you’re only paying for labor and new pins—not an entirely new lock. If you have multiple locks that can be rekeyed to use the same key, you may also save time and money compared to replacing each lock.
Lock replacement, while more expensive, provides the opportunity to upgrade. You’ll be investing in brand-new hardware, which may include better materials, enhanced security features, or smart capabilities. Depending on the lock style and complexity, replacement costs can vary, so it’s always a good idea to ask your locksmith for a recommendation based on your goals and budget.
Security Considerations
From a security standpoint, both options can be effective—but it depends on the condition and quality of your existing locks. Rekeying is perfectly safe as long as your current locks are in good working condition. However, if your locks are outdated or low-grade, replacing them with stronger, pick-resistant models will offer better protection.
For businesses or properties requiring access control or audit trails, lock replacement with electronic or smart locks may be the better long-term solution. And if you’re concerned about someone using an old key to gain entry, both rekeying and replacing will immediately cut off access.
Aesthetic and Functional Upgrades
Aside from security, replacing your locks gives you the chance to improve the look and usability of your door hardware. You might choose a more modern finish, a better grip, or a design that matches your home’s style. If you’re looking to reduce the number of keys you carry, install a keypad, or add remote access, replacing your lock is the only option that offers these features.
Rekeying, on the other hand, keeps your existing hardware intact, which can be helpful if you have custom or vintage locks that match the aesthetic of your home.
Which Option Is Right for You?
Ultimately, the decision between rekeying and replacing depends on what you’re trying to accomplish. If your current locks are in good condition and you simply want to change who has access, rekeying is an efficient and affordable solution. But if your locks are damaged, outdated, or lacking the features you need, replacing them is the smarter long-term investment.
A professional locksmith can inspect your hardware, assess your security needs, and guide you toward the best option for your specific situation. In some cases, a combination of both may be ideal—rekeying interior locks while replacing exterior ones with higher-security models.
Final Thoughts
When it comes to your safety and peace of mind, your locks play a crucial role. Whether you choose to rekey or replace them, taking action is always better than putting it off and hoping for the best. At M&H Locksmith, we help homeowners and businesses make informed decisions based on their unique needs. If you’re unsure about which option is best for your property, we’re happy to take a look and walk you through it—no pressure, just honest advice you can trust.
