Rekeying vs. Replacing Your Locks: What Homeowners Should Know

Rekeying changes the internal pins of your existing lock so old keys no longer work, while replacing a lock involves installing entirely new hardware. For many homeowners, rekeying is sufficient after moving, losing a key, or changing access. Full replacement is typically recommended when locks are damaged, outdated, or no longer meet security needs.

Understanding the difference can help you choose the most practical and secure option for your home.

What Does Rekeying a Lock Mean?

Rekeying involves adjusting the internal components of a lock cylinder so it works with a new key.

The external hardware stays in place, but:

• Old keys stop working
• A new key is created
• The lock’s functionality remains the same

According to national housing data, millions of Americans move into new homes each year, making rekeying one of the most common residential locksmith services.

“Rekeying is often the first step we recommend after a move, it ensures previous keys no longer grant access.” - KeyMe Locksmiths

When Rekeying Makes Sense

Rekeying is typically appropriate when:

• You’ve moved into a new home
• A key has been lost or not returned
• You want all locks to work with one key
• The existing hardware is in good condition

Because the physical lock stays in place, rekeying is often less involved than full replacement.

What Does Replacing a Lock Mean?

Replacing a lock means removing the existing hardware and installing a new lock entirely.

This may be necessary if:

• The lock is worn or damaged
• You want upgraded security features
• The lock model is outdated
• You’re switching to smart lock technology

“Replacement makes sense when the hardware itself no longer meets your security expectations.”  - KeyMe Locksmiths

Modern deadbolts and smart locks often include improved pick resistance and reinforced strike plates compared to older models.

Security Considerations: Which Is Safer?

Both rekeying and replacement can improve home security when done properly.

The FBI reports that a large percentage of residential burglaries involve unlawful entry through doors, highlighting the importance of functioning, properly secured locks.

If your current lock is structurally sound, rekeying can effectively eliminate access from old keys. However, if the lock is outdated or compromised, replacement may offer stronger protection.

“The decision comes down to conditions and security goals.”  - KeyMe Locksmiths

Cost and Convenience Differences

While exact costs vary, rekeying typically involves fewer materials and less labor than full lock replacement.

Replacement may be preferred if:

• You want upgraded hardware
• You’re changing finishes or aesthetics
• You need enhanced durability

The best option depends on your home’s condition and your long-term plans.

Can You Rekey All Locks?

Many standard residential locks can be rekeyed. However:

• Some high-security locks require manufacturer authorization
• Certain smart locks cannot be traditionally rekeyed
• Severely worn locks may not function reliably after rekeying

A professional evaluation helps determine compatibility.

Frequently Asked Questions

Is rekeying enough after buying a home?

In most cases, yes. Rekeying ensures previous keys no longer work without replacing all hardware.

How often should locks be replaced?

Locks don’t have a fixed lifespan, but replacement is recommended if they show wear, damage, or outdated security features.

Can I rekey instead of replacing after losing a key?

Often, yes—especially if the hardware is in good condition.

Are smart locks better than traditional locks?

Smart locks offer convenience features, but overall security depends on installation quality and lock design.

Should I rekey or replace after a break-in?

If the lock is damaged, replacement may be necessary. If not, rekeying can restore key control.

Choosing the Right Option for Your Home

Rekeying and replacing both serve important roles in residential security. If your locks are in good shape and you simply need new key control, rekeying may be the practical solution. If your hardware is worn or outdated, replacement could provide stronger protection and peace of mind.

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About KeyMe Locksmiths

KeyMe Locksmiths is a leading provider of local locksmith services and key copy kiosks across 50 states and the District of Columbia. Proud to serve over 5 million customers, KeyMe Locksmiths cuts over 10 million keys annually. With more than 7,500 self-service kiosks in major retailers, an e-commerce platform delivering over 10,000 keys weekly, and a nationwide locksmith network, KeyMe Locksmiths provides fast, reliable solutions for residential, commercial, and vehicle needs. KeyMe Locksmiths is committed to delivering exceptional service backed by a 100% money-back guarantee. KeyMe Locksmiths also operates one of the nation’s leading retail media networks, connecting consumers to other brands seeking to advertise in-store and delivering over 2B monthly impressions.