Is It Cheaper to Rekey or Change Locks?

By Michael G., 22 years of experience · November 6, 2026 · 6 min read

Is it cheaper to rekey or change locks? Usually, rekeying costs less when the existing lock works and you only need to invalidate old keys. Replace the lock when it is damaged or you want different hardware.

Need help now? (240) 366-2739

Is It Cheaper to Rekey or Change Locks?

Rekeying is usually the less expensive choice when the lock is in good condition and you want old keys to stop working. A locksmith adjusts the lock cylinder so it works with a different key, while the existing lock hardware stays on the door.

Changing a lock means removing the existing lock and fitting another one. That can cost more, but it makes sense when the lock is worn, damaged, or you want a different type of hardware.

Which Lock Problem Calls for Rekeying, and Which Calls for Replacement?

Start with the reason you are considering a change, then check whether the lock itself still works properly. Losing control of a key does not automatically mean you need new hardware; a faulty lock is a different problem.

• You moved into a home or took over a space — If the locks work and you do not know who has copies of the old keys, rekeying can make those keys unusable. Consider replacing the lock if you also want different hardware.
• A key is missing or may be in the wrong hands — Rekeying can prevent the missing key from operating the lock. If the lock is also damaged or difficult to use, ask about replacement rather than treating this as only a key-control issue.
• The lock sticks, jams, or has visible damage — A new key will not fix a worn or damaged lock. Have the lock and door checked before deciding whether repair or replacement is appropriate.
• You want to change the door hardware — Replacement is the direct option when you want a different lock style or new hardware. Check that the new lock is suitable for the door before purchasing it.

How Can You Decide Between Rekeying and a New Lock?

Use these checks to describe the problem clearly and choose what to ask a locksmith. They help you make a decision without taking apart a lock or trying to force a key.

1. Identify every door involved — List the exterior doors and the locks you want addressed. Check how many locks are affected so you can ask for a clear scope of work.
2. Note the reason for the change — Write down whether a key is missing, someone no longer needs access, or the lock is malfunctioning. This helps separate a key-control need from a hardware problem.
3. Check how the lock behaves — Use the key normally and notice whether the lock turns smoothly or sticks. Stop if the key binds or the lock feels unstable, and tell the locksmith what you observed.
4. Look at the visible hardware — Check for loose parts, obvious damage, or a door that does not line up with its frame. Share what you see instead of trying to adjust the lock yourself.
5. Consider who needs access — Make a list of the people who should have keys after the work. Decide whether you want to keep the current hardware or are seeking a different lock.
6. Confirm who can authorize the work — If you rent or manage a property, check with the property owner or manager before changing its locks. Have authorization ready when you arrange service.
7. Ask what the proposed work includes — Ask whether the locksmith recommends rekeying or replacement and why. Confirm which doors and locks are included before work begins.
8. Test the finished lock with the new key — After the work, check that the key operates the lock smoothly with the door open and closed. Make sure the people who should have access receive the correct keys.

Need help now? (240) 366-2739

What Changes a Locksmith’s Cost to Rekey Your Locks?

A locksmith’s cost to rekey depends on the number of locks, the type and condition of the hardware, and whether the locks can be rekeyed as they are. If a lock is damaged or incompatible with the requested key setup, replacement may be needed instead.

When comparing a rekey cost from a locksmith, ask what the quote covers and whether it includes every lock you named. A locksmith rekey price should make clear whether the work is rekeying, replacing hardware, or both. MD Locksmith lists a $15 service call for lock change service; ask what work is appropriate for your locks before authorizing it.

When Does a Damaged Lock Make Replacement the Better Choice?

Replacement is worth discussing when a lock is cracked, badly worn, unreliable, or does not operate normally. Rekeying changes which key works with a lock; it does not repair damage to the lock or correct a door that is out of alignment.

A lock that sticks can have more than one cause. The key, lock, door, and frame may all affect how it operates, so avoid forcing the key or trying to dismantle the hardware. If the problem continues, arrange an assessment through our lock change service.

What Should You Check After Locks Are Rekeyed or Replaced?

Before the locksmith leaves, confirm that the work matches the doors and locks you discussed. These simple checks can catch a mix-up while the service is still in progress.

• Test each new key — Try the key in each lock that was serviced. Confirm that it turns smoothly and that the lock secures the door.
• Check the door with the lock engaged — Make sure the door closes and the lock works when the door is shut, not just when it is open. If it binds or fails to latch, point that out.
• Keep track of the new keys — Confirm how many keys you received and who should have them. Do not assume a key for one lock works with every lock in the home.
• Ask what was changed — Get a clear explanation of which locks were rekeyed and which were replaced. Keep any service details with your household or property records.

Need help now? (240) 366-2739

How Should Renters Handle Rekeying or Lock Changes?

If you rent, contact your property owner or manager before arranging a lock change or rekey. Confirm who can approve the work and who must receive new keys, since the lock may be part of the property’s access plan.

For an owner-occupied home, decide who should have access after the work and whether the existing hardware is still dependable. If you want to keep sound locks but stop old keys from working, ask about rekeying; if you want different hardware, ask about replacement.

When Is It Time to Call a Locksmith About Your Locks?

Call a locksmith when a lock will not operate normally, a key is stuck or damaged, or you need to prevent old keys from working and are unsure which option fits. Do not force the key or try to defeat the lock; that can damage the hardware or door.

For model-specific owner information, consult the lock maker’s support resources, such as Schlage support for Schlage locks. You can also review the Associated Locksmiths of America resources when choosing a locksmith. For service, reach MD Locksmith or see our locksmith in Silver Spring page.

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