Ever found yourself staring at a lock, wondering if you should rekey it or just replace the whole thing? Yeah, me too. Let me tell you about the time I moved into my first apartment. The previous owner handed over a single key, grinned, and said, “Good luck!” Turns out, five different neighbors also had copies. Cue panic. Did I need to swap out all the locks? Or was there a cheaper, faster fix? Spoiler: I went with rekeying. But let’s break down why—and when you might pick one over the other.
Rekeying vs Replacing: The Basics
Before we geek out over pins and tumblers, let’s get clear on what these terms actually mean. Because, let’s be real, nobody wants to sound clueless at the hardware store.
What is Rekeying?
Rekeying a lock is like giving it a software update instead of buying a new phone. You keep the same lock hardware, but a locksmith tweaks the inner pins and springs so your old key no longer works. They’ll create a new key that fits the updated setup.
Here’s the play-by-play:
- The locksmith removes the lock cylinder.
- They replace the current pins with new ones of different lengths.
- A fresh key is cut to match the new pin configuration.
Pros of Rekeying:
- Cheaper than replacing (usually 20–50 per lock vs 80–200+ for new hardware).
- Faster—most locks take 10–15 minutes to rekey.
- Ideal if you like your existing locks but want to invalidate old keys (landlords, I’m looking at you).
Cons of Rekeying:
- Doesn’t fix physical damage or upgrade security.
- All locks must use the same brand/keyway to work with one key.
FYI, I’ve rekeyed my own locks before using a kit from Amazon. Let’s just say it involved sweat, tears, and a YouTube tutorial playing at 0.5x speed. DIY can save cash, but if you value your sanity, maybe call a pro :).
What is Replacing a Lock?
Replacing a lock is exactly what it sounds like: yanking out the old hardware and installing a brand-new lock. This could mean swapping just the doorknob/deadbolt or upgrading the entire system.
Pros of Replacing:
- Fixes broken or outdated locks.
- Lets you upgrade to smarter, sturdier hardware (think smart locks or commercial-grade deadbolts).
- No compatibility issues—choose any style/brand you want.
Cons of Replacing:
- Costs more (new hardware + labor).
- Takes longer, especially if you’re swapping multiple locks.
When my buddy’s antique front door lock finally gave up (RIP, 1940s brass beauty), replacing was the only option. We toasted its retirement with pizza and a shiny new deadbolt.
Key Differences: Cost, Time, and Security
Let’s cut to the chase. How do these two stack up where it matters?
Cost Showdown
- Rekeying: 20–50 per lock (or 5–10 for a DIY kit, if you’re brave).
- Replacing: 80–300+ per lock, depending on brand and complexity.
Winner for Budget-Conscious Folks: Rekeying, hands down.
Time Commitment
- Rekeying: 10–30 minutes per lock for a pro. DIY? Maybe an hour… or three.
- Replacing: 15–60 minutes per lock, especially if dealing with finicky door alignment.
Winner for Impatient Humans: Rekeying. Unless you’re installing a smart lock that lets you ditch keys forever. Then, maybe worth the wait?
Security
- Rekeying: Great for neutralizing lost keys, but doesn’t improve physical security.
- Replacing: Lets you upgrade to high-security picks, like bump-proof or pick-resistant locks.
Winner for Paranoid Plot Twist Lovers: Replacing. Because sometimes you need a lock that laughs at bolt cutters.
When to Rekey vs Replace: A Handy Cheat Sheet
Still stuck? Ask yourself these questions:
“Do I like my current locks?”
- Yes, but I don’t trust who has copies → Rekey.
- No, they’re rusted/sticking/older than my car → Replace.
“Am I renting or owning?”
- Renting → Rekey (landlords often prefer this).
- Owning → Replace if you want long-term upgrades.
“Is this an emergency?”
- Lost keys at 2 a.m.? Rekeying can usually wait until morning.
- Broken lock after a break-in? Replace yesterday.
DIY vs Hiring a Pro: Know Your Limits
Look, I’m all for saving money. But locks are one area where “good enough” can bite you.
When to DIY:
- You’re rekeying a basic lock with a kit.
- You’ve successfully assembled IKEA furniture without rage-quitting.
When to Call a Locksmith:
- Dealing with high-security or smart locks.
- Your DIY attempt ended with a hammer and a muttered “I’ll just leave the door open, I guess.”
True story: My cousin tried replacing a lock himself and accidentally superglued the deadbolt shut. The fire department may or may not still have a photo.
Final Verdict: Which Should You Choose?
Rekeying is like editing a draft—it’s quick, affordable, and gets the job done if the foundation’s solid. Replacing is rewriting the whole thing; it’s costlier but lets you upgrade your “story.”
Go with Rekeying If:
- You’re moving into a new place.
- You lost keys or gave one to an ex who’s… let’s say, overly nostalgic.
- Your locks are in good shape but need a key refresh.
Go with Replacing If:
- Your lock is damaged, ancient, or looks like it survived a zombie apocalypse.
- You want smart features (keyless entry, app control, Alexa judging your comings and goings).
- Aesthetic upgrades matter (brushed nickel > crusty brass, fight me).
TL;DR: Don’t Overthink It
At the end of the day, both rekeying and replacing solve the same core problem: keeping your space secure. Rekeying is your budget-friendly, speedy option. Replacing is the upgrade path for better security or style.
Next time you’re debating the two, just channel your inner locksmith and ask: “Does this lock deserve a second chance, or is it time to swipe left?” Either way, you’ve got options. Now go forth and conquer that front door—preferably without superglue.
