One of the most common questions homeowners ask is: should I rekey my locks or replace them? Both accomplish the goal of making old keys work — but they are very different in cost, time, and when they are appropriate. Here is a clear breakdown.
What Is Rekeying?
Rekeying changes the internal pin configuration of your existing lock cylinder so that old keys no longer work and only a new key will open the lock. The hardware (the lock body, the knob or handle, the deadbolt mechanism) stays exactly the same — only the small metal pins inside the cylinder are changed.
Cost: $20–$50 per lock (labor only) plus a service call fee. See our lock rekeying page.
Time: About 10–15 minutes per lock.
What Is Lock Replacement?
Lock replacement means removing the entire existing lock and installing a brand-new one. This gives you new hardware, a new cylinder, and new keys — a complete fresh start.
Cost: $110–$300+ per lock (labor + hardware) depending on brand and type. See our lock change page.
Time: 20–40 minutes per lock.
When to Rekey Your Locks
Rekeying is the right choice when:
- You just moved in — You do not know who has copies of the previous owner’s keys. Rekeying is faster and cheaper than full replacement when the hardware is in good shape.
- A roommate moved out or a relationship ended — They returned their key, but may have made copies. Rekeying immediately makes those copies useless.
- Keys were lost or stolen — Rekey the affected locks as soon as you get home.
- Your locks are relatively new and in good working order — No reason to throw away good hardware.
- You want all your doors on one key — We can rekey all your locks to work with the same key (called “keying alike”), which is a very popular upgrade.
When to Replace Your Locks
Lock replacement is the better choice when:
- Your lock is damaged, worn, or stiff — A lock that is hard to turn or shows wear should be replaced entirely, not just rekeyed.
- You want to upgrade security — Moving from a basic Kwikset to a Schlage B-series or a high-security Medeco requires full replacement.
- You want a smart lock — Keypad locks, Bluetooth locks, and app-controlled locks require full replacement. You cannot rekey them to work with a new physical key configuration because there often is no key at all.
- There are signs of attempted break-in — Scratches around the keyhole, a bent strike plate, or a loose lock body all indicate the lock has been compromised and should be replaced.
- Your lock is 10+ years old — Older locks may not meet current security standards and the metal pins can wear out.
Rekeying vs. Replacing: Quick Comparison
| Factor | Rekeying | Replacing |
|---|---|---|
| Cost per lock | $20–$50 | $110–$300+ |
| Time per lock | 10–15 min | 20–40 min |
| Security upgrade | No (same lock) | Yes (new lock) |
| Smart lock option | No | Yes |
| Best for worn locks | No | Yes |
| Best for new move-in | Yes | If upgrading |
Get a Same-Day Quote in Prosper TX
Not sure which option is right for your situation? Call us at (972) 544-4574 and describe your locks — we can advise over the phone and dispatch a technician to your Prosper, Frisco, Celina, McKinney, or Collin County home the same day. We provide an upfront written quote before starting any work.
Ready to get started? Explore our lock rekeying service or lock replacement service in Prosper TX.
