Rekeying vs. Replacing Your Locks: What Homeowners Should Know

Rekeying your locks means changing the internal pins so old keys no longer work, while replacing your locks involves removing the entire lock hardware and installing new ones. For most homeowners, rekeying is the faster and more affordable option, especially after moving, losing keys, or changing tenants. In fact, locksmith industry data shows that over 60% of residential lock security updates can be solved with rekeying rather than full lock replacement. Understanding the difference helps you protect your home without overspending.

 “Many homeowners assume they need new locks when rekeying would fully restore security. Replacing is sometimes necessary, but rekeying is often the smarter first step.” - KeyMe Locksmiths

What Does It Mean to Rekey a Lock?

Rekeying changes the internal pin configuration of a lock so it works with a new key and rejects all previous keys.

What Rekeying Involves

• Removing the lock cylinder
• Replacing internal pins
• Creating new matching keys
• Testing for smooth operation

When Rekeying Is Ideal

• You just moved into a new home
• Keys were lost or stolen
• A roommate, tenant, or contractor moved out
• You want all doors to work with one key

Nearly 8 in 10 new homeowners rekey their locks within the first month, often instead of replacing them.

Learn more about rekeying services: https://key.me/locksmiths 

What Does It Mean to Replace a Lock?

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

Replacement May Include

• New deadbolts
• New doorknobs or levers
• Smart locks
• High-security locks

When Replacement Makes Sense

• The lock is damaged, worn, or malfunctioning
• You want to upgrade to a smart or high-security lock
• The lock is outdated or builder-grade
• The hardware doesn’t meet current security standards

“If the lock itself is in good shape, rekeying is usually all that’s needed. Replacement is best when the hardware can’t reliably protect the door.” - KeyMe Locksmiths

Rekeying vs. Replacing: Key Differences at a Glance

Cost Comparison: Rekeying vs. Replacing Locks

Typical Rekeying Costs

• $20–$50 per lock
• $80–$200 for an entire home

Typical Lock Replacement Costs

• $100–$350+ per door (including hardware)
• Smart or high-security locks may cost more

Homeowners who choose rekeying instead of replacement save an average of 40–60% on lock-related security updates.

Security Considerations Homeowners Often Miss

Rekeying and replacing both improve security, but in different ways.

Rekeying Improves Security By:

• Eliminating unauthorized key access
• Preventing old keys from working
• Allowing better key control

Replacing Improves Security By:

• Upgrading lock strength
• Adding advanced features (keypads, smart access)
• Improving resistance to picking or forced entry

“The best solution isn’t always rekey or replace, it’s choosing the option that matches the condition of your door, lock, and security needs.” - KeyMe Locksmiths

Common Homeowner Scenarios & Best Choice

• Just moved in = Rekey
• Lost keys = Rekey
• Break-in attempt = Replace
• Old, loose, or sticking locks = Replace
• Want one key for all doors = Rekey
• Upgrading to smart locks = Replace

Can You Rekey a Lock Yourself?

DIY rekey kits exist, but they require:

• Precise pin matching
• Experience with lock cylinders
• Correct tools

Mistakes can leave locks unreliable or unusable.

Locksmith service data shows DIY rekey attempts result in lock failure about 25% of the time, often requiring professional repair afterward.

When to Call a Professional Locksmith

A professional locksmith can:

• Assess whether rekeying or replacement is best
• Rekey multiple locks quickly
• Install new locks correctly
• Align doors and strike plates
• Ensure smooth, secure operation

Residential locksmith services: https://key.me/locksmiths
Lock installation & repair: https://key.me/locksmith-repair-install 

FAQs

Does rekeying make my home secure?

Yes, rekeying prevents old keys from working and restores access control.

How long does rekeying take?

Most homes can be rekeyed in under an hour.

Can all locks be rekeyed?

Most standard pin-tumbler locks can. Some specialty or smart locks require replacement.

Should I rekey or replace after buying a house?

Rekeying is usually sufficient unless the locks are damaged or outdated.

Final Thoughts: The Right Choice Saves Money and Improves Security

For most homeowners, rekeying is the fastest and most affordable way to restore security. Replacing locks makes sense when hardware is damaged, outdated, or when upgrading to smarter technology. A professional locksmith can help you choose the right solution based on your home—not guesswork.

Need help deciding? Call KeyMe Locksmiths 24/7
Schedule residential service or find a nearby kiosk: https://key.me/kiosks