If you’re trying to improve your home security, one of the first questions you may ask is whether you should rekey your existing locks or replace them entirely. The answer depends on your situation. Rekeying a lock is often the more cost-effective option if your existing hardware is in good condition, while changing locks is typically the better choice when the lock is damaged, outdated, or you want new features like smart locks or high security locks.

Understanding the difference between these two services can help you make the right decision for your home and your budget.

What Does Rekeying a Lock Mean?

Rekeying a lock changes the lock so it works with a new key without replacing the entire lock.

During lock rekeying, a locksmith removes the lock cylinder and replaces the internal pins, sometimes called key pins or tumblers, inside the lock mechanism. Once the new pins are installed, your old house keys will no longer work, and a new key becomes the only one that operates the lock.

The exterior hardware stays exactly the same. Only the internal components are changed.

What Does Changing Locks Mean?

Changing locks, also called lock replacement, involves removing the existing lock and installing an entirely new one.

This process replaces every part of the lock system, including the lock cylinder, lock mechanism, hardware, and often the doorknob or deadbolt if desired. Homeowners frequently choose this option when upgrading to smart locks, electronic locks, or newer security products.

A complete lock replacement also allows you to change the appearance of your door hardware.

When Should You Rekey Your Locks?

Rekeying is often the best solution when the locks themselves are still in good condition.

You may want to consider rekey service if you are:

  • Moving into a new home
  • Concerned about a lost key
  • Unsure who may still have copies of your house keys
  • Looking for a more cost-effective security upgrade
  • Keeping your existing door locks but wanting a new key

Because the hardware remains in place, rekeying is usually faster and less expensive than changing a lock.

When Is Changing Locks the Better Option?

Sometimes replacing the entire lock simply makes more sense.

Changing a lock is often recommended if:

  • The existing lock has been damaged after a break-in.
  • The lock mechanism no longer operates smoothly.
  • You want to upgrade to smart locks or electronic locks.
  • Your existing hardware is worn or outdated.
  • You want high security locks for added protection.

A professional locksmith can help determine whether repair or replacement is the better long-term investment.

How Lock Rekeying Works

Many homeowners are surprised by how little actually changes during rekeying.

Once the lock cylinder is removed, the locksmith rearranges the internal pins to match a newly cut key. Those tiny tumblers work together with the new key while preventing the old one from turning the lock.

From the outside, nothing appears different. Internally, however, the lock has been completely reconfigured.

Can You Rekey Every Lock?

Many popular residential locks can be rekeyed, including products from brands like Kwikset and Schlage.

However, not every lock is designed for rekeying. Some specialty locks or heavily worn hardware may require replacement instead. A professional locksmith can inspect your locks and recommend the most practical solution.

What About Smart Locks?

Many homeowners are upgrading to smart locks for added convenience.

Smart locks allow keyless entry, remote access, temporary codes for guests, and smartphone integration. If you are already planning to modernize your home's security, changing locks rather than rekeying may be the better investment.

That said, many homeowners combine traditional deadbolt hardware with smart lock technology for additional flexibility.

Can You Rekey Locks Yourself?

Rekey kits are available for some residential lock brands.

These kits typically include replacement key pins and tools for specific products such as Kwikset locks. While experienced DIY homeowners may successfully complete the project, the process requires patience and attention to detail.

If the pins are installed incorrectly, the lock may not function properly. For many homeowners, professional locksmith services offer greater peace of mind.

Consider a Master Key System

If you own multiple properties or want simplified access throughout your home, a master key system may be worth considering.

A master key system allows designated keys to operate multiple locks while maintaining individual security where needed. Professional locksmiths commonly install these systems for larger homes, rental properties, and commercial buildings.

This type of lock system offers both convenience and security.

Which Option Costs Less?

In most cases, rekeying a lock costs less than full lock replacement.

Because the existing hardware remains in place, labor and material costs are generally lower. However, if your locks are damaged or you want upgraded security features, changing locks may provide better long-term value despite the higher initial investment.

Your locksmith can help you compare costs based on your specific situation.

Key Takeaways

  • Rekeying a lock changes the internal pins while keeping the existing hardware.
  • Changing locks replaces the entire lock system.
  • Rekeying is often the more cost-effective solution when hardware remains in good condition.
  • Lock replacement is recommended for damaged locks or security upgrades.
  • Smart locks and electronic locks require full replacement rather than rekeying.
  • Professional locksmith services help ensure proper installation and long-term reliability.
  • Moving into a new home is one of the most common reasons homeowners choose lock rekeying.

FAQs About Rekeying vs. Changing Locks

Is rekeying a lock cheaper than changing locks?

Yes, in most situations rekeying costs less because the existing hardware remains in place. Only the internal pins inside the lock cylinder are replaced, reducing both labor and material costs. If your locks are still in good condition, rekeying is often the more economical option.

Yes. When moving into a new home, you rarely know how many copies of the previous house keys exist or who may still have access. Rekeying provides a new key while allowing you to keep your existing locks.

No. Many residential locks can be rekeyed, especially products from manufacturers like Kwikset and Schlage, but not every lock is designed for this process. A professional locksmith can inspect your hardware and determine whether rekeying or lock replacement is appropriate.

During lock rekeying, the locksmith removes the lock cylinder and replaces the internal pins or tumblers that correspond with the key. The exterior hardware remains the same, but the old key no longer operates the lock. Once complete, only the newly cut key will work.

Changing a lock is usually recommended when the lock mechanism is damaged, after a break-in, or when upgrading to smart locks or high security locks. Replacement may also make sense if the hardware is heavily worn or outdated. Your locksmith can help you evaluate the condition of your existing locks.

Some homeowners successfully use rekey kits for compatible locks. However, installing the internal pins incorrectly can prevent the lock from functioning properly. If you are unfamiliar with lock mechanisms, professional locksmith services are often the safer choice.

A master key system allows one master key to operate multiple locks while still permitting individual keys to open only designated doors. These systems are commonly used for larger homes, businesses, and rental properties. They provide added convenience without sacrificing security.

Smart locks offer convenient features such as remote access, temporary access codes, and smartphone control. Their overall security depends on the quality of the hardware and proper installation. Many homeowners combine smart locks with a high-quality deadbolt for additional protection.

Protect More Than Your Locks with Dwellness

Keeping your home's locks secure is an important part of protecting your property, but maintaining the systems inside your home is just as important. From plumbing and HVAC to major appliances, unexpected breakdowns can happen when you least expect them.

Dwellness helps homeowners protect the home systems and appliances they rely on every day with dependable home warranty coverage. Contact Dwellness today to learn more about our home warranty plans and discover how greater protection can bring lasting peace of mind for your entire home.