Two different problems, two different fixes
People often treat rekeying and replacing as competing options, as if one were the lesser version of the other. They are better understood as answers to different problems. Rekeying solves a key problem: you want to change who holds a working key. Replacing solves a hardware problem: the lock itself is worn, damaged, weak, outdated or no longer suits your needs.
Sometimes you have only the first problem. You just bought a home, the locks are sound and you want old keys to stop working. Rekey. Sometimes you have only the second. The deadbolt sticks, the handle sags and you want a keypad. Replace. And sometimes you have both, in which case a replacement lock arrives with a new key and solves both at once.
A good decision starts by naming which problem you are solving. If you cannot name it, step back. Many homeowners who ask whether they need new locks really mean they want to feel secure, and a short conversation with a technician about what worries them often clarifies what to do. Our page on what rekeying is gives the background, and this page builds on it.
Question one: what is the condition of the lock
Start with condition. A lock in good shape works smoothly, the key turns without effort, the bolt extends and retracts fully, the handle is firm, the finish is intact and the parts are tight on the door. A lock in poor shape sticks, grinds, rattles, shows corrosion or has visible damage.
If the lock is in good condition, rekeying is usually reasonable, because the hardware has life left in it. If the lock is worn, replacing it avoids paying to rekey a failing device. A rekey does not fix a worn spring, a loose housing, a stripped screw hole or a corroded latch. It only changes pins in the cylinder.
In South Florida, condition often means corrosion. Exposed exterior hardware near the coast, or on doors that take rain and sun, deteriorates faster than hardware inside a climate-controlled hallway. Green or white powder on brass, rust streaks on steel and pitted finishes are signs that the lock is near the end of its life. Our page on salt air and lock corrosion explains what to look for. In that situation, replacement with hardware designed for harsh conditions may be more sensible than rekeying a failing lock.
Question two: what is the grade of the hardware
Residential locks come in different grades of build quality and strength. Higher grades generally use heavier materials, longer bolts and stronger internal parts. Lower grades are lighter and easier to defeat or wear out. Packaging often shows a grade designation, and a technician can tell you where your lock falls by looking at it.
If you have a low-grade lock and the main concern is security, replacing it with a better one can improve resistance to forced entry in a way that rekeying cannot. If you have a good-grade lock, rekeying keeps that strength while resetting key control. Our page on deadbolt grades and throw length explains the terms.
Grade is not the whole story. A strong lock on a weak door or frame is only as strong as the weakest part. If the strike plate is held by short screws into soft wood, or the frame is cracked, even the best lock can be defeated. Consider the door, the frame and the strike plate as part of the decision. Our page on strike plates and door reinforcement covers those.
Question three: what are your goals
Goals matter as much as condition. Write down what you want from the change. Common goals include ending access for people who hold old keys, using one key for several doors, adding convenience through a keypad or smart lock, improving resistance to forced entry, updating appearance to match a renovation, standardizing hardware across a rental portfolio or restoring function to a failing lock.
Match each goal to the approach that serves it. Ending access for old keys points to rekeying. One key for several doors points to rekeying or to replacement with matching cylinders. Convenience features such as keypads and smart locks point to replacement. Improved resistance points to replacement and reinforcement. Appearance points to replacement. Standardization points to replacement or rekeying to a common keyway. Restoring function points to repair or replacement.
If your goals pull in different directions, a combination may work. For example, you might replace the front door deadbolt with a higher grade keypad lock while rekeying the back door and garage entry to match a new key. A technician can lay out combinations and explain the tradeoffs.
| Your main goal | Usually points to | Why |
|---|---|---|
| Stop old keys from working | Rekey | Changes the pin arrangement and keeps sound hardware |
| Lock is worn, loose or corroded | Replace | A rekey does not repair failing parts |
| Want a keypad or smart lock | Replace | Electronic features need different hardware |
| One key for several doors | Rekey or replace | Depends on keyways and lock condition |
| Stronger resistance to forced entry | Replace and reinforce | Grade, bolt length and frame all matter |
| Match a renovation style | Replace | Finish and design are hardware choices |
Question four: can this lock be rekeyed at all
Not every lock can be rekeyed. Most standard pin-tumbler locks from major makers can. Some inexpensive locks are built so that the cylinder cannot be taken apart or the pins cannot be changed, and replacement is the only way to change the key. Some specialty cylinders, sealed units and older designs have limited parts support.
Smart locks vary. Some have a conventional mechanical cylinder that can be rekeyed, while the electronic function uses PINs and apps. Others are fully keyless and have nothing to rekey. In those cases, the equivalent step is changing PINs and removing users. A technician can tell you which parts of your lock can be rekeyed and which cannot.
Keyway compatibility also matters. If you want several locks to share a key, they must use the same keyway, or the cylinders must be changed to a common one. Locks from different makers often use different keyways, and a technician may suggest replacing one or more cylinders to match. This is a practical limit and not a sales tactic. Our page on rekeying all doors to the same key goes through it.
Question five: what kind of property is it
The type of property shapes the answer. A single-family home owner has the most freedom and can choose either route freely. A condo owner may face association rules, such as a requirement that unit locks remain on a master key system or that hardware match a building standard. Check before replacing, since a mismatch can cause trouble. Our page on locksmith authorization for condos and HOAs covers the usual restrictions.
A renter has the least freedom, because the lock belongs to the landlord and the lease usually prohibits changes. A tenant should ask the landlord for a rekey or a replacement, not do it themselves. A landlord, by contrast, may prefer rekeying at each turnover for efficiency, and replacement when hardware wears out, or standardization across many units.
A business may have different needs: panic hardware, fire-rated doors, commercial grade locks, master key systems and access control. Commercial doors often use heavier hardware, and rekeying is common within a system. Our page on master key systems for businesses goes through those considerations.
A simple way to put it together
You can combine the questions into a short sequence. First, name the problem: is it a key problem, a hardware problem or both? Second, check condition: is the lock sound, or worn and corroded? Third, check grade: is it strong enough for how you use the door? Fourth, state your goals: do you want convenience features, matching keys or appearance changes? Fifth, check feasibility: can this lock be rekeyed, and does it share a keyway with your others? Sixth, check the rules: do your lease or association restrict changes?
If the lock is sound, the grade is adequate and your goal is key control, rekey. If the lock is worn, low grade or you want new features, replace. If you are uncertain, ask a technician to look at one or two locks and give an honest opinion, then decide.
You can also work in stages. Rekey now to deal with an immediate concern, and plan replacement of worn hardware over time, door by door, as budgets and schedules allow. There is no rule that you must do everything at once.
- Rekey when the lock is sound and the issue is who holds keys.
- Replace when the lock is worn, corroded, low grade or lacks the features you want.
- Do both when you want new hardware and a clean key count.
- Reinforce the door and frame whichever route you choose.
- Stage the work if you want to spread the effort over time.
No pressure: how a fair conversation sounds
The way a technician talks about this decision tells you a lot about whether to trust them. A fair conversation includes looking at your locks before recommending anything, explaining what rekeying can and cannot do, describing replacement options without insisting on the most elaborate one and leaving the choice with you. A technician who urges replacement of every lock without inspecting them, or who refuses to discuss rekeying, may be steering you toward the larger job.
You should also expect honesty about limits. If your door or frame is the weak point, a good technician says so, even if the fix is a reinforcement kit rather than a new lock. If your lock is fine and a rekey will do, they say that too. Our guides on locksmith quotes and avoiding scams describe warning signs worth knowing.
On this site, quotes are given only by phone, and complicated jobs may need an on-site visit before a final quote. A service call charge applies to visits and is explained before anyone is dispatched. We do not quote figures on web pages because the right answer depends on your locks.
Examples from South Florida homes
Examples make the framework concrete. A homeowner in Pembroke Pines has a ten-year-old deadbolt that turns easily and shows no corrosion, and just bought the house from sellers who gave out keys to several people. The lock is sound and the concern is key control, so rekeying fits.
A condo owner in Delray Beach has a balcony-facing entry door whose lock is green with corrosion and sticks every morning. The key problem is minor, but the hardware is failing. Replacing it with a lock built for salt air solves the real issue, and the new lock arrives with a new key.
A landlord in Lauderhill turns over eight units a year. The locks are a uniform mid-grade model, in decent condition, and the landlord wants predictable turnover. Rekeying at each turnover keeps the hardware in service and the key count clean, and the landlord plans replacement of any lock that shows wear during inspection.
A family in Weston wants a keypad on the front door so that children can enter without a key. The existing lock is fine mechanically, but a keypad needs different hardware. Replacement is the route, and the family also asks for the back door to be rekeyed to match a spare key kept for emergencies.
A small office in Oakland Park has a wooden door with a frame that has cracked near the strike plate. A new lock would not help much until the frame is repaired. The better first step is reinforcing the frame and strike plate, with the rekey or replacement decision made afterward.
Getting started
When you call, tell us about the locks you have. If you can, note the brand and the type, such as deadbolt, knob or lever, and whether any are keypad or smart. Describe any problems, such as sticking, wobbling or corrosion. Tell us your goals and whether you own or rent, and whether you are in a condo or a managed community.
Have your photo ID and something linking you to the address on your phone. If you rent, have the landlord's authorization. Photos of the locks and doors help us understand what we are dealing with before anyone is dispatched.
Call when you are ready, and we will talk through rekeying and replacement honestly, based on what you tell us, so you can choose the route that fits your home.
Questions people ask
Is rekeying as secure as replacing the lock?
For key control, yes: old keys stop working either way. For hardware strength, it depends on the lock. A good-grade lock keeps its strength after rekeying, while a weak lock stays weak. If strength is your concern, discuss grade, bolt length and reinforcement along with the key question.
When should I choose replacement over rekeying?
Choose replacement when the lock is worn, loose, corroded or low grade, or when you want features such as a keypad or smart lock. A rekey does not repair failing parts or add features. A technician can inspect your locks and tell you which route fits.
Can I rekey some doors and replace others?
Yes. Many households rekey sound locks and replace worn or outdated ones. You can also stage the work over time. A technician can plan a mix so that all locks work with a consistent key arrangement if you want that.
Do all locks work with a single key after rekeying?
Only if they share a compatible keyway or their cylinders are changed to match. Locks from different makers often use different keyways. A technician can tell you whether your locks can be unified and what, if anything, would need to change.
Does my condo or lease limit what I can change?
It may. Associations sometimes require unit locks to stay on a master key system, and leases often prohibit tenant changes. Check the rules and get written permission where needed before arranging any work on a lock you do not fully control.
How do I know I am getting honest advice?
Look for a technician who inspects your locks first, explains what rekeying can and cannot do, describes options without pressure and leaves the choice with you. Be cautious of anyone who insists on replacing everything unseen or refuses to discuss rekeying.
Describe the situation by phone and we will tell you what the job involves. Quotes are given by phone. Jobs that cannot be quoted without seeing them need a technician on site, and the service call charge is explained on the phone before anyone is dispatched.
Related pages
Walking a real doorway with the decision in hand
When a technician stands at your door to help you choose between rekeying and replacing, the conversation usually begins with a quiet physical look rather than a pitch. The finish, the way the latch retracts, any play in the knob or lever, and the condition of the keyway all tell a story. A lock that turns smoothly and sits firmly in its bore is a strong candidate for new pins and fresh keys. A lock that wobbles, drags, or shows deep wear is a different case. Looking first, and explaining what is seen, keeps the choice tied to the hardware in front of you.
Next comes a short test that you can watch. The technician operates the key several times, checks whether the bolt throws fully into the frame, and feels for grinding or sticking. If the cylinder fights the key only when the door is closed, the problem may be alignment rather than the lock, and neither rekeying nor replacing would fix it. Naming that early saves you from paying for work that does not solve the complaint. It also shows why a decision made over the phone is only a starting guess until someone has handled the door.
Finally, expect the scope to be laid out before any tool touches the lock. That means which parts would be changed, which would stay, and what the quote covers, all explained in plain words so you can say yes, no, or ask for a simpler option. Having your goal ready helps: tell the technician whether you worry about lost keys, a former tenant, or simply tired hardware. A clear goal turns a vague conversation into a fitting recommendation, and you stay in control of the decision from the first minute to the last.