Rekey vs Replace Locks: Which is the Right Choice for Your Home?

Choosing between rekeying and replacing your locks can be confusing, but it's one of the most important decisions for your home security.

In short, Rekeying changes the internal pins of your existing lock so old keys no longer work, while replacing means installing completely new lock hardware. Rekeying is usually more affordable and faster, while replacing gives you a full hardware and security upgrade.

In this guide, you'll learn how each option works, what they cost, and when to choose one over the other.

Rekeying is a process in which a locksmith modifies the internal components of your existing lock.

A locksmith removes the lock cylinder and changes the pins and tumblers inside it to match a brand-new key. Your existing lock hardware, like the knob or deadbolt, stays the same. The final result is that the old key will no longer work, securing your home.

A locksmith rekeys a lock by removing the cylinder, replacing the pins inside it, and reassembling the lock. The process is quick and precise:

1. Remove the Cylinder: The locksmith professionally removes the lock cylinder from the doorknob or deadbolt housing.
2. "Repin" the Cylinder: The internal pins are removed and replaced with a new set that is cut to match a new key.
3. Reassemble: The cylinder is placed back in the hardware. The lock looks identical, but your security is restored.

Replacing a lock involves removing the entire locking mechanism and installing a brand-new one. This process involves the complete removal of all components, including the old deadbolt, knobs, and any exterior handles. A locksmith then installs entirely new hardware.

This is the option you choose when you want to change the style of your hardware, such as getting a new finish or moving from a knob to a lever, or when you want to install a different type of lock, like a keypad.

Here is a quick breakdown of the key differences to help you compare them at a glance.

You should rekey your locks when your hardware is in good condition, but you need to change who has access. Rekeying is the best choice in these common situations:

• You are moving into a new home and want to ensure you're the only one with a key.
• You lost a key or had one stolen.
• A tenant, roommate, or employee has left, and you need to revoke their access.

Your locks are all in good working condition.

You must replace your locks when they are old, broken, or you want to upgrade your style or security level. Sometimes, rekeying isn't enough. Replacing is your best or only option when:

• Your locks are old, rusted, or malfunctioning. If your key sticks, jiggles, or the lock is hard to turn, it's worn out and needs to be replaced.
• You want a new style. If you're updating your home from old brass to matte black, you'll need to replace the hardware.
• You want a security upgrade. This includes moving to areas that are pick-resistant or drill-resistant.
• You're upgrading to a smart lock or keypad. This is the most common reason for a full replacement today.
• Your locks are all different brands, and you want them keyed alike. A locksmith can't rekey a Kwikset lock to use a Schlage key; you'd need to replace it with a matching set.

Choosing between rekeying and replacing depends on your needs. Rekeying is a cost-effective way to control key access (like after moving or losing a key) if your locks are in good condition.

Opt to replace your locks when the hardware is broken, old, or you want an aesthetic or security upgrade, such as a smart lock. At Locksmith Express, our expert locksmith near you can help you determine the best option for your home. Get an honest recommendation. Request your free security quote.

"Changing locks" refers to the complete replacement of the locking hardware. Rekeying is a service where a locksmith alters the internal pin structure of your existing lock cylinder. This renders all previous keys inoperable and provides you with a new set, all while keeping your original hardware.

The cost to rekey is almost always more affordable than a full replacement. The final price typically consists of a standard service call fee plus a per-cylinder charge. This method avoids the expense of new hardware, offering significant savings when securing multiple locks.

The best option depends on the condition of your lock and your security goals. Rekeying is the ideal solution if your hardware is in good working order but you need to revoke access (e.g., after moving in). Replacement is necessary when locks are damaged, worn out, or when you wish to upgrade your hardware for aesthetic or security reasons, such as installing smart locks.

Rekeying is a quick and efficient service. A professional locksmith can typically rekey a standard lock cylinder in approximately 10 to 20 minutes. An entire home with multiple locks can usually be completed well within an hour.

Yes, this is a common request known as "keying alike". Provided your locks are the same brand or use the same "keyway" (the shape of the keyhole), a locksmith can rekey multiple locks to operate using a single, existing key for your convenience.