How to Rekey a Lock in Just a Few Simple Steps

Whether you’ve just moved into a new home, lost a key, or want more control over who has access to your house, rekeying your locks is a smart, cost-effective solution. Many homeowners wonder how to rekey a lock without calling in a locksmith. The good news is, with the right tools and guidance, you can do it yourself.

In this article, we’ll break down how to rekey a lock in just a few simple steps. We’ll also cover when it’s better to rekey versus replace your locks, common tools you’ll need, and tips to help make the process smooth and secure.

Rekeying vs. Replacing Locks: What’s the Difference?

Before jumping in, it’s important to understand the difference between rekeying and replacing locks.

• Rekeying a lock means changing the internal pins and springs so a new key will work while the old one no longer does. The exterior hardware stays the same.
• Replacing a lock involves removing the entire locking mechanism and installing a brand-new one.

Why choose rekeying?

• It’s less expensive than replacing locks.
• It’s quicker and easier when you have matching lock brands.
• It helps maintain a uniform appearance for your doors.

If your locks are in good condition and you’re simply concerned about who has access, rekeying is often the smarter choice.

When Should You Rekey Your Locks?

Here are some common situations where rekeying your locks makes sense:

• You’ve just moved into a new home.
• You’ve lost your keys or had them stolen.
• A roommate, tenant, or contractor no longer needs access.
• You want all your doors to use the same key.
• You’re upgrading home security on a budget.

Knowing how to rekey a lock can empower you to take control of your home’s security without needing a full hardware upgrade.

Tools You’ll Need to Rekey a Lock

Rekeying a lock at home doesn’t require professional locksmith equipment, but you will need a few essential tools:

• Rekeying kit (matched to your lock’s brand—e.g., Kwikset, Schlage)
• New keys (usually included in the kit)
• Plug follower (a small cylinder used during the pin replacement process)
• Pinning chart (comes with most kits)
• Tweezers or small needle-nose pliers
• Screwdriver

You can find rekeying kits at most hardware stores or online for $10 to $25.

How to Rekey a Lock

Here’s a simple walkthrough for how to rekey a lock at home. Note that these instructions are generalized. Please be sure to follow brand-specific guidance included with your rekey kit.

Step 1: Remove the Lock from the Door

Use a screwdriver to remove the lock hardware (typically the interior and exterior knobs or levers). Carefully remove the cylinder from the lock housing.

Step 2: Take Out the Lock Cylinder

Insert the original key into the cylinder and turn it slightly (usually 90 degrees) to align the key pins. Use the plug follower to push out the cylinder plug while keeping pressure steady. Be careful not to dislodge the top pins or springs.

Step 3: Remove the Old Pins

Once the plug is out, remove the old key pins from the plug. Discard the old pins and make sure the plug is clean.

Step 4: Insert New Pins for the New Key

Use the pinning chart from your rekeying kit to match new pins to your new key. Insert your new key into the plug and place the correct pins into the chambers. All pins should be flush with the surface of the plug when aligned correctly.

Step 5: Reassemble the Lock

Carefully reinsert the plug into the cylinder using the plug follower to keep everything aligned. Reinstall the cylinder into the lock housing. Attach the lock back onto the door and test your new key.

Common Mistakes to Avoid When Rekeying

While the process is straightforward, a few common errors can cause headaches:

• Mismatched rekey kits and locks: Always use a rekeying kit that matches your lock’s brand.
• Incorrect pin heights: If pins are not flush, the key won’t turn smoothly.
• Losing small parts: Work on a clean, flat surface to keep track of pins and springs.
• Forcing the plug: Use even, steady pressure when inserting or removing the plug.

Take your time, and don’t hesitate to repeat a step if something doesn’t feel right.

When to Call a Locksmith

While DIY rekeying works for many homeowners, there are times when hiring a pro is the best choice:

• You’re dealing with a high-security lock or a smart lock.
• The lock is damaged or very old.
• You’ve attempted rekeying but the key doesn’t turn smoothly.
• You want all locks rekeyed to one key across multiple brands.

Professional locksmiths have access to more advanced tools and techniques and can complete complex jobs quickly and securely.

Benefits of Rekeying Your Own Locks

Taking the time to learn how to rekey a lock can offer multiple benefits:

• Cost savings: Rekeying costs a fraction of full lock replacement or professional locksmith fees.
• Convenience: You can rekey multiple locks to work with one key.
• Improved security: Regain control over who has access to your home.
• Self-sufficiency: Gain a new skill that can come in handy whenever needed.

Now that you know how to rekey a lock, you can take a proactive step toward better home security without the need for expensive replacements or locksmith services. Whether you’re a new homeowner or just want to simplify your keyring, rekeying is a valuable skill worth learning.

At Liberty Home Guard, we’re here to support every aspect of homeownership from securing your doors to protecting your systems and appliances. Check out our full range of home warranty plans and expert tips to keep your home safe, efficient, and worry-free.