Homeowners: Rekey or Replace Locks. Which to Choose?
For most homeowners, rekeying is the cheaper, faster way to regain exclusive access to a home, typically running $40 to $160 per job according to Angi, while full replacement makes more sense when hardware is damaged or you want a genuine security upgrade. Replacement costs more, often landing between $130 and $500, but it solves problems rekeying cannot touch. The right call depends on what condition your locks are actually in, not just what feels safer.
TL;DR:
Rekeying typically costs $40 to $160 per lock and takes 10 to 15 minutes, making it a quick and affordable option for controlling access.
Hardware damage, wear, or outdated locks require replacement, especially for high-security needs or after a break-in, where rekeying cannot fix mechanical issues.
A lock’s physical condition and ANSI/BHMA grade are crucial to determine if rekeying suffices or if hardware replacement is necessary for improved security and durability.
DIY rekey kits work with compatible cylinders but cannot fix hardware damage or antique locks that are not rekey-compatible, necessitating professional assistance.
Replacing locks is more environmentally sustainable than rekeying and offers opportunities for upgrading security features, but it involves longer installation time and higher cost.
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How much rekeying and replacing actually cost
Rekeying and replacing solve the same basic worry, unauthorized access, but at very different price points and time commitments. Professional rekeying commonly falls between $40 and $160 per visit, while full lock replacement typically runs $130 to $500, with many consumer sources citing an average closer to $315 depending on hardware quality, according to Angi.
Rekeying often takes 10 to 15 minutes per lock, according to Angi, since a locksmith only swaps the pins inside the existing cylinder. Replacement takes longer, usually 30 to 60 minutes or more, especially if the door needs new prep work for a different strike plate or bore size.
Rekeying: minutes per lock, minimal tools, no door modification.
Replacement: 30 to 60 minutes or more, sometimes with drilling or hardware fitting.
DIY rekey kits generally cost $10 to $25, but they only work with rekey-compatible cylinders.
Emergency or after-hours calls tend to cost more than scheduled appointments, so booking during regular hours saves money when the situation allows it.
Decision checklist for choosing rekeying or replacement
Matching your situation to the right fix keeps you from overspending or, worse, leaving a weak lock in place.
Moving into a new home: Rekey any lock that looks and functions well, since you have no idea who holds copies of the current keys.
Lost or possibly copied keys: Rekey immediately rather than replacing, unless the lock itself shows wear.
Removing access for a former tenant, roommate, or contractor: Rekeying revokes their key instantly without new hardware.
Visible damage or repeated jamming: Replace the lock, since rekeying will not fix a worn or broken mechanism.
Wanting smart lock features or a higher security grade: Replace, since rekeying cannot add features a lock was never built with.
Lock was compromised during a break-in attempt: Replace, since forced entry often damages the cylinder or strike plate beyond a simple pin swap.
A staged approach works well for budget-conscious homeowners: rekey now for immediate peace of mind, then replace later once you are ready to invest in upgraded hardware.
Pro Tip: Take a photo of your lock’s keyway and exterior face before calling anyone. It often lets a locksmith confirm compatibility over the phone and quote you accurately without an extra visit.
How to inspect a lock and know when replacement is the only option
A quick visual and physical check tells you more than guesswork. Look for these before deciding.
Mechanical wear: sticking, grinding, a key that requires wiggling, or a deadbolt that wobbles in its housing.
Physical damage: rust on the cylinder, a cracked or fractured cylinder face, loose trim, or a bent strike plate.
Tamper evidence: scratch marks around the keyway, a strike plate pried loose, or any sign of a prior forced-entry attempt.
Compatibility issues: antique mortise or rim locks that modern rekey pins cannot fit, or a door frame that needs repair before new hardware will seat properly.
Any of these point toward replacement, since rekeying only changes what key opens the lock, not the mechanical condition behind it.
What rekeying changes and why hardware grade matters
Rekeying replaces the pins and tumblers inside a cylinder so old keys stop working, but it does nothing to reinforce the lock body, the strike plate, or the door frame. If the physical hardware is weak, rekeying leaves that weakness exactly where it was.
This is where the ANSI/BHMA grading system becomes useful. Grade 1, 2, and 3 locks are rated through standardized tests for operational cycles, strength, and security, according to the ANSI Blog, with grade 1 built for heavy-duty commercial and high-traffic residential use.
Grade 1: highest durability and security rating, suited to primary entry doors.
Grade 2: mid-range performance, common in standard residential exterior doors.
Grade 3: lighter-duty rating, typically used on interior doors.
Paying for a grade 1 replacement makes the most sense on front entry doors, rental units between tenants, or any home where long-term durability matters more than upfront savings.
When DIY makes sense and how to avoid locksmith scams
Some locks are built for homeowner rekeying. Schlage, for example, documents an Advanced Rekey feature that lets homeowners rekey their own locks in minutes, provided they have the current working key. DIY kits run roughly $10 to $25, but compatibility is the catch: not every brand or cylinder type supports self-rekeying, and a mismatched attempt can damage the mechanism.
Hiring a professional still makes sense for master key systems, keyed-alike setups across multiple doors, or any job where a warranty matters more than saving an hour.
Verify licensing and ask for identification before letting anyone start work.
Insist on a written estimate before any tools come out.
Be cautious of unsolicited door-to-door lock or security offers.
Know that in-home purchases carry a three-business-day cooling-off right, according to the FTC, which lets you cancel certain contracts signed at your home.
For a deeper walkthrough on vetting a locksmith before booking, see our guide on avoiding locksmith scams.
Pro Tip: Get a written estimate before work begins, even for a routine rekey. It protects you from inflated pricing once the technician is already at your door.
A locksmith’s rule of thumb for making the call
Rekey if the hardware is sound and the problem is who holds a key. Replace if the hardware is damaged, outdated, or you want stronger security. Local Locksmith & Car Keys Delaware handles both as mobile jobs, arriving at your location with the tools to rekey or replace on the spot.
— Brian
Does rekeying or replacing affect your home insurance policy
Insurers care about the overall security of a home more than the specific method used to control access. A functioning, undamaged lock, whether rekeyed or brand new, typically satisfies standard policy requirements as long as the door secures properly and shows no signs of neglect.
Where it can matter is after a claim. If you file a burglary claim and the investigation finds evidence that locks were left in poor mechanical condition, worn strike plates, a door that never latched correctly, that can factor into how the claim is reviewed. Replacing damaged hardware after an incident, rather than simply rekeying, may better demonstrate that you addressed the underlying problem.
Some insurers offer modest discounts for verified security upgrades such as high-security deadbolts or monitored smart locks. A basic rekey rarely qualifies for these discounts because it does not change the hardware itself, only who holds working keys. If you are shopping for a discount tied to lock upgrades, check with your carrier before assuming either option qualifies, since requirements vary by insurer and are not standardized industry-wide.
The safest approach is to keep any receipts or invoices from lock work done, whether rekeying or replacement, since documentation supports both insurance conversations and resale disclosures down the line.
Limitations of rekeying, including master key system complications
Rekeying has real limits worth knowing before you commit to it as a fix. It only changes which key operates a lock, so it does nothing for a cylinder that is mechanically failing, corroded, or already damaged.
Master key systems add another layer of complexity. In a building or home with a master key setup, rekeying one lock without updating the entire system can break the hierarchy, leaving that single door unable to be opened by the master key, or worse, accidentally granting broader access than intended if pins are miscut. Any property using master keying should have the whole system rekeyed together by someone who understands the pinning chart, not just the one lock causing concern.
Rekeying also assumes a compatible cylinder. Older mortise locks, some antique hardware, and a handful of proprietary systems cannot be rekeyed with standard pin kits, which pushes those cases toward replacement regardless of preference.
Finally, rekeying does not remove smart lock vulnerabilities or app-based access issues, since those systems are not mechanical pin-and-tumbler locks in the traditional sense. A rekey job addresses physical keys only.
Environmental impact of rekeying compared to full replacement
Rekeying generates far less waste than replacement, since the existing lock body, faceplate, and strike plate all stay in place. Only the small internal pins get swapped, and the old ones are lightweight enough that the overall material footprint of the job is minimal compared to manufacturing and shipping an entirely new lockset.
Replacement means the old hardware, often a mix of brass, steel, and zinc alloy, gets discarded, and a new unit gets manufactured, packaged, and shipped to take its place. For homeowners weighing sustainability alongside cost and security, rekeying is the lower-impact choice whenever the existing hardware is still mechanically sound.
That said, replacement is sometimes the more responsible long-term choice. A lock that fails repeatedly and gets serviced over and over may end up costing more in repeated locksmith visits and replacement parts than simply installing a durable grade 1 unit once. Buying quality hardware upfront, and keeping it maintained rather than replacing it reactively, tends to reduce total resource use over the life of a home.
Why the standard advice oversimplifies this decision
Most guidance on rekeying versus replacing treats it as a binary cost question: rekey is cheap, replace is expensive, choose accordingly. That framing misses the point. The real question is whether your current hardware deserves to keep working, and plenty of homeowners rekey locks that were already due for retirement simply because rekeying felt like the lower-effort choice.
The bigger blind spot is security grade. Homeowners rarely check whether their front door lock carries any ANSI/BHMA rating at all, and a rekeyed grade 3 lock is still a grade 3 lock afterward. Rekeying preserves whatever security level you already had, for better or worse.
The priority should be inspecting the hardware honestly before deciding. If it is sound, rekeying is the sensible, lower-cost move. If it shows wear, damage, or was never rated for exterior use in the first place, replacement is not an upgrade you are choosing so much as a fix you are overdue for.
Getting help from Local Locksmith & Car Keys Delaware
Some locksmith services handle both rekeying and full lock replacement as mobile jobs, arriving at your home or business rather than asking you to remove hardware and bring it somewhere. Services typically include residential rekeying, new lock installation, and smart lock upgrades, along with high-security lock options for homeowners seeking grade-based improvements rather than like-for-like swaps.
If you are unsure which option fits, take a photo of your lock’s keyway and face and request a written estimate. Ask specifically about ANSI/BHMA-grade options if you are leaning toward replacement, and confirm what warranty coverage applies before work begins. Visit the locksmith services page to review the full list of residential, automotive, and commercial options, or read more on choosing a trusted locksmith before you book.
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FAQ
Is it better to rekey or replace locks?
Rekeying is usually the better choice when the lock hardware is in good condition and you simply need to control who has a working key. Replacement is better when hardware is damaged, outdated, or you want a security upgrade such as a higher ANSI/BHMA grade.
Does rekeying mean replacing the entire lock?
No, rekeying only changes the pins and tumblers inside the existing cylinder so old keys no longer work. The lock body, faceplate, and strike plate all stay exactly as they were.
How much does rekeying usually cost?
Professional rekeying commonly costs between $40 and $160 per job, according to Angi. Exact pricing depends on the number of locks, the lock brand, and whether the visit happens during regular hours or as an emergency call.
Can you rekey a lock without changing the lock?
Yes, that is the entire point of rekeying: the lock itself stays in place while a locksmith swaps the internal pins to match a new key. Some manufacturers, including Schlage with its Advanced Rekey feature, even let homeowners do this themselves if they have the current working key.
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