Rekey vs. Replace: What Your Locks Actually Need
Rekeying costs a fraction of replacement and solves most key problems. Here's when each one is the right call, with honest 2026 prices and a quick decision checklist.
Rekeying keeps your locks and kills your old keys
Rekeying means a locksmith opens up the cylinder inside your existing lock, swaps the small pins for a new set, and cuts fresh keys to match. The hardware on your door never moves. From the outside, nothing looks or feels different. The one thing that changes is the important thing: every old key stops working, instantly and permanently.
For a pro, this takes about 10 to 15 minutes per lock. There's no drilling, no new holes, no mismatched finish on your door. If your lock turns smoothly and the deadbolt throws all the way, the mechanical part of your security is fine. Rekeying just resets who has access.
What rekeying costs in 2026
When a locksmith comes to your home, expect $30 to $60 per cylinder, plus a service-call or trip fee that usually runs $75 to $150 depending on your area and time of day. A typical house with four to six locks lands somewhere around $225 to $375 all-in. If you can pull the locks off the doors yourself and bring them to a locksmith's shop, the per-cylinder price often drops to $23 to $38 with no trip fee at all.
One warning that matters more than the exact numbers: a phone quote of "$19 service call, tech will price the rest on site" is the classic bait-and-switch setup. A legitimate locksmith can give you a real range for rekeying over the phone, because it's routine work with predictable pricing. If the quote only exists once the truck is in your driveway, hang up and call someone else.
When rekeying is the right answer
If the lock itself works and your only problem is who might have a key, rekey. That covers most of the situations people call about. You're not paying for new metal; you're paying to make every unknown copy of your key worthless, and that's usually exactly what you need.
The most common cases where rekeying is the correct, cheaper call:
- You just moved into a new home (previous owners, their relatives, agents, and contractors may all have copies)
- You lost a key and don't know where it ended up
- A roommate, tenant, ex-partner, or house sitter moved out and may still have a key
- Your keys were stolen but the locks themselves are undamaged
- A contractor, cleaner, or dog walker had a copy you never got back
- You want one key to open every door in the house
When full replacement genuinely earns its price
Replacement costs several times more than rekeying, so it should solve a problem rekeying can't. There are real cases where it does. Rekeying a worn-out lock is putting new pins in failing hardware; you'll be calling someone again within a year.
Replace instead of rekey when:
- The lock is worn or failing: the key needs jiggling, the cylinder sticks, the bolt doesn't throw fully, or the whole assembly wobbles
- Someone attempted a break-in and the lock, strike plate, or door frame took damage, even damage you can barely see
- You're upgrading security: moving from builder-grade hardware to an ANSI Grade 1 deadbolt or a high-security cylinder that resists picking and bumping
- You're switching to a smart lock or keypad; there's no rekeying your way into electronics
- Your doors carry a mix of old brands and finishes and you want matching, keyed-alike hardware, since different brands often use incompatible keyways
The cost comparison, honestly
Rekeying a typical home in 2026: roughly $225 to $375 for a locksmith visit covering four to six locks. Replacing those same locks: builder-grade deadbolts run $25 to $60 each in hardware, solid Grade 1 or high-security deadbolts run $80 to $200 each, and smart locks run $150 to $350 and up. Add professional installation at $75 to $225 per door and a whole-house replacement easily reaches $600 to $1,500 or more.
So replacement typically costs three to five times what rekeying does. That's not an argument against it; it's an argument for making sure you're buying what you actually need. If the hardware is healthy and the problem is stray keys, the expensive option buys you nothing the cheap one doesn't. And the two aren't exclusive: plenty of people replace one damaged front-door lock and rekey the rest of the house in the same visit.
One key for every door
Here's the trick a lot of homeowners don't know: during a rekey, ask the locksmith to key all your locks alike, so a single key opens the front door, back door, side door, and garage entry. If your locks share a brand and keyway, this costs little or nothing extra, often $8 to $15 per cylinder at most, and some locksmiths fold it into the standard rekey price.
The catch is the keyway, the shape of the slot the key slides into. A Kwikset lock and a Schlage lock can't share a key because the blanks physically don't interchange. If your doors carry mixed brands, the locksmith can usually swap a cylinder or two so everything matches, which is still far cheaper than replacing every lock.
About those DIY rekey kits
Hardware stores sell rekey kits for $15 to $30, and they do work, with caveats. Each kit is brand-specific: a Kwikset kit won't touch a Schlage, and neither helps with the off-brand lock on your side door. The work itself is fiddly. Cylinders come apart into springs and pins the size of rice grains, and one dropped spring on a dark porch can turn a $20 project into a locked-out evening. Kwikset's SmartKey line is the exception; those rekey with a simple tool in under a minute.
There's also a paper-trail issue. After a theft or break-in, some insurance claims and most landlord situations go smoother with a locksmith's invoice showing the locks were professionally rekeyed on a specific date. A DIY job gives you no documentation and no guarantee. If you're handy and every lock in the house is the same brand, a kit is a fair Saturday project. Otherwise the professional visit is usually money well spent.
The 60-second decision checklist
Run down this list before you call anyone. It settles most cases in under a minute:
Still not sure? Ask the locksmith to quote both options on site, in writing, before any work starts. A good one will walk you through it without pressure. If anyone pushes hard toward the expensive option on locks that work fine, that tells you something about the company, not your locks.
- Lock turns smoothly and the bolt throws fully → rekey
- Your only worry is who might have a key → rekey
- Key needs jiggling, or the lock sticks or wobbles → replace that lock
- Any damage from a break-in attempt → replace, and check the strike plate and frame
- You want a smart lock or keypad → replace that door's lock
- You want a higher security grade → replace
- You want one key for every door and locks are the same brand → rekey, keyed alike
Frequently asked questions
How much does it cost to rekey a house in 2026?
Expect $30 to $60 per lock cylinder plus a service-call fee of $75 to $150 when a locksmith comes to you, so a typical four-to-six-lock home runs about $225 to $375 total. Bringing the locks to a locksmith's shop yourself usually cuts that to $23 to $38 per cylinder with no trip fee. Be wary of very low phone quotes like "$19 service" — that's a common bait-and-switch opener.
Does rekeying make my old keys stop working?
Yes, that's the entire point. The locksmith replaces the pins inside the cylinder, so old keys no longer turn and only the newly cut keys work. Just make sure every exterior lock gets rekeyed in the same visit; a skipped back door still opens with the old key.
Is it cheaper to rekey or replace my locks?
Rekeying is almost always cheaper, usually a third to a fifth of the cost of replacement. Rekeying a whole house typically runs $225 to $375, while replacing the same locks with decent hardware and professional installation can reach $600 to $1,500 or more. Replacement only earns its price when the hardware is worn, damaged, or you're upgrading to a higher security grade or a smart lock.
Should I rekey or replace the locks after buying a house?
Rekey, unless the locks are visibly worn or flimsy builder-grade hardware you wanted to upgrade anyway. You have no way of knowing how many key copies the previous owners handed out to relatives, contractors, and neighbors over the years. A rekey makes every one of those copies useless for a modest price, usually in a single one-hour visit.
Can one key open every door in my house?
Yes, it's called keying alike, and a locksmith can do it during a standard rekey for little or no extra charge. The requirement is that your locks share the same keyway, which generally means the same brand, such as all Kwikset or all Schlage. If you have mixed brands, the locksmith can swap a cylinder or two to match, which still costs far less than replacing everything.
Are DIY rekey kits worth it?
They can be if you're handy and all your locks are one brand, since every kit is brand-specific and the pin work is genuinely fiddly. Kwikset SmartKey locks are the easy case, rekeyable with a small tool in about a minute. The trade-off is that DIY gives you no locksmith invoice, which insurance claims and landlords sometimes want as proof the locks were changed on a specific date.