Should You Rekey or Replace Your Locks? Here’s What Experts Recommend

When it comes to protecting your home and loved ones, the strength and reliability of your locks matter more than most people realize. Whether you've just moved into a new house, experienced a break-in, or are upgrading your home’s security system, you’ll eventually face this critical question: Should you rekey or replace your locks?

The answer isn’t always straightforward, and choosing the wrong option can cost you both time and money, not to mention peace of mind. In this guide, we’ll break down the pros, cons, and ideal scenarios for both rekeying and replacing your locks. Plus, we’ll share expert insights to help you make the smartest choice for your home’s safety.

What’s the Difference Between Rekeying and Replacing Locks?

Before we dive into what the experts recommend, let’s quickly define the two:

• Rekeying a lock means changing the internal mechanism (called pins or tumblers) so that the old key no longer works. A locksmith provides a new key, but the hardware stays the same.
  
  

• Replacing a lock involves removing the entire lock and installing a new one—new hardware, new keys, and sometimes a new door adjustment.

Understanding this difference is key (pun intended) to making the right choice for your home’s specific security needs.

When Should You Rekey Your Locks?

Rekeying is often the preferred option in many common home security situations. It’s faster, less expensive, and just as secure—when done correctly.

Best Scenarios to Rekey:

1. You’ve Just Moved Into a New Home
   You have no idea who may still have a copy of the old keys—real estate agents, contractors, previous owners, or even tenants. Rekeying ensures that only you have access.
   
   

2. Lost or Stolen Keys
   If your keys have gone missing, and you’re concerned someone may use them to enter your home, rekeying is a fast way to regain control over your property.
   
   

3. You Want to Match Multiple Locks to One Key
   Tired of juggling a dozen different keys? A professional locksmith can rekey your existing locks to use a single master key—convenient and secure.
   
   

4. You’ve Had a Recent Tenant Move Out
   For rental properties or Airbnb units, rekeying is a cost-effective way to reset access without full replacement.
   
   

Pros of Rekeying:

• More affordable than replacing

• Faster service, often completed in under an hour

• Keeps existing hardware (ideal for high-end or historic homes)

Cons of Rekeying:

• Won’t fix hardware that’s worn, damaged, or outdated
  
  

• Requires the original key (or a way to access the cylinder)

When Should You Replace Your Locks?

In some cases, rekeying just doesn’t go far enough. Upgrading your locks entirely may be the safer, smarter option.

Best Scenarios to Replace:

1. Your Current Locks Are Damaged or Worn
   If your locks are hard to turn, stick often, or feel flimsy, replacement is the only real fix. Replacing improves both functionality and appearance.
   
   

2. You Want to Upgrade to Smart Locks or High-Security Systems
   Rekeying can’t turn a basic deadbolt into a Wi-Fi-enabled smart lock. If you want keyless entry, smartphone control, or biometric features, you’ll need new hardware.
   
   

3. After a Break-In or Attempted Forced Entry
   Intrusions often compromise the integrity of your lock, even if the door wasn’t fully breached. For peace of mind, full replacement is usually recommended.
   
   

4. You’re Remodeling or Changing Doors
   Aesthetic upgrades are a great time to match your locks to your new style. Plus, new hardware ensures modern protection.
   
   

Pros of Replacing:

• Allows for full hardware upgrades
  
  

• Can improve aesthetics and add resale value
  
  

• Enables smart home integrations
  
  

Cons of Replacing:

• Higher cost (due to labor and materials)
  
  

• Requires more time and may involve door adjustments

So, What Do the Experts Recommend?

Most locksmith professionals agree: Start with rekeying unless your locks are damaged, outdated, or you’re upgrading to smart security. Rekeying preserves your existing investment and offers top-notch protection when done by a trusted technician.

However, if you’re serious about security, replacing outdated or builder-grade locks is one of the best investments you can make for your home—especially in luxury properties or areas with high foot traffic.

A balanced strategy? Rekey your locks immediately when moving in or changing occupants. Then, plan for a full hardware upgrade every 7–10 years to stay current with technology and standards.

How to Choose Between Rekeying and Replacing

Here’s a quick side-by-side comparison to help you decide:

Work with a Trusted Professional Locksmith

Whether you choose to rekey or replace, the quality of work matters. Cheap DIY solutions or unlicensed technicians can leave your home vulnerable and lead to costly repairs down the line.

For best results, always consult a professional locksmith who’s certified, insured, and experienced with your type of lock hardware. KeyZoo Locksmiths offers top-tier service, same-day appointments, and cutting-edge solutions tailored for modern homeowners.

Your locks are your first line of defense—and understanding the difference between rekeying and replacing can make all the difference in your home’s safety and value. While rekeying is fast, affordable, and often the perfect solution, replacing your locks is a powerful upgrade when better protection or aesthetics are needed.

Whichever option you choose, make sure it's done by a qualified locksmith who puts your security first.

Need help deciding? Contact a professional locksmith to assess your home’s current locks and recommend the best course of action.

Related Articles:

• What Are The 7 Essential Components of Modern Home Security Systems?
• Mastering Smart Home Security