What Rekeying Actually Means
Rekeying changes the internal pins inside your lock cylinder so old keys no longer work. A locksmith removes the cylinder, swaps out the pin stack, and cuts a new key to match. Your existing hardware—deadbolt, knob, strike plate—stays in place.
Most pin-tumbler locks can be rekeyed in minutes. Wafer locks (common in older file cabinets and some exterior doors) also rekey easily. The process is fast, affordable, and works on nearly any mechanical lock in decent shape.
You keep the same finish, the same knob style, the same everything—just a new key. If you like your current hardware and it still latches smoothly, rekeying is usually the smarter move.
When Rekeying Makes Sense
Choose rekeying when your locks function fine but your key control is compromised. Common scenarios:
- New home purchase: You don't know who has copies of the previous owner's keys.
- Lost keys: A roommate moved out with a spare, or you can't find the key you lent a contractor.
- Employee turnover: A former worker had office keys and never returned them.
- Match multiple locks to one key: Tired of juggling five keys? A locksmith can rekey your front, back, and garage deadbolts to operate on a single key.
Rekeying costs a fraction of replacement—often $20–$40 per lock depending on your area and lock type. If the bolt throws smoothly and the cylinder turns without grinding, you're a perfect candidate. Need advice on your specific setup? Our team can assess your locks over the phone or on-site—check out our full range of residential locksmith services.
What Lock Replacement Involves
Replacement means removing the entire lockset—cylinder, knob or lever, latch assembly, strike plate—and installing brand-new hardware. You'll get fresh keys, a new finish, and often an upgrade in security grade.
Deadbolts and knobs are rated by ANSI/BHMA standards: Grade 1 (highest security, commercial-grade), Grade 2 (residential heavy-duty), and Grade 3 (builder-grade basic). If your current lock is a flimsy Grade 3 with a short throw and a stamped strike, replacement lets you step up to a Grade 1 or 2 deadbolt with a reinforced strike plate and a one-inch throw.
Installation takes longer than rekeying—typically 30–60 minutes per door if no prep work is needed. Prices vary by hardware choice, but expect $75–$200 per lock installed, including the lockset itself.
When You Should Replace Instead of Rekey
Replace your locks if any of these apply:
- Visible damage: Bent bolt, cracked housing, stripped screws, or a cylinder that binds when you turn the key.
- Forced entry or attempted break-in: Even if the lock still latches, internal components may be compromised. Replace for peace of mind.
- Outdated or low-grade hardware: If you have builder-grade knob-in-knob locks with no separate deadbolt, upgrading to a Grade 1 deadbolt is a real security improvement.
- Style or finish change: Moving from brass to satin nickel, or from a standard knob to a lever handle for accessibility—rekeying won't help.
- Smart lock upgrade: Adding a keypad, Bluetooth, or Z-Wave deadbolt requires new hardware. Make sure the new lock matches your door's backset (usually 2⅜" or 2¾") and bore diameter (standard is 2⅛").
Replacement also makes sense if you're consolidating to a master-key system across multiple properties. A locksmith can install matching cylinders and set up master, sub-master, and change keys in one visit.
Cost and Speed Comparison
Rekeying is faster and cheaper. Expect $20–$40 per lock and 10–20 minutes per cylinder. If you're rekeying five locks to one key, total labor might be an hour.
Replacement costs more—hardware plus installation. A decent Grade 2 deadbolt runs $40–$80 retail; professional installation adds labor. Total per-door cost typically lands between $100 and $200, depending on the lockset you choose and any door-prep work required.
Speed matters in emergencies. If you're locked out or dealing with a security scare, a mobile locksmith can rekey on the spot with parts on the truck. Replacement might require ordering specific finishes or styles, adding a day or two. For urgent situations, rekeying gets you secure now.
We offer flat-rate pricing quoted up front before dispatch—no surprise trip fees, no hourly clock-watching. Half the price, twice the speed compared to the big franchise locksmiths.
Can You Rekey Any Lock?
Most mechanical pin-tumbler and wafer locks rekey easily. Deadbolts, knob locks, lever-handle locks, and even some padlocks qualify.
Exceptions and complications:
- High-security locks: Medeco, Mul-T-Lock, and Assa Abloy cylinders use restricted keyways and specialized pins. Rekeying requires factory blanks and training. Many locksmiths handle them, but confirm first.
- Smart locks: Electronic deadbolts don't use traditional pins. Some models let you delete old user codes (which is similar in spirit), but you can't "rekey" a Bluetooth credential the way you'd swap pins.
- Damaged cylinders: If the plug is frozen with corrosion or the pins are broken, rekeying won't fix it. Replacement is your only option.
- Non-rekeyable designs: A handful of cheap import locks have riveted cylinders or proprietary designs that make disassembly impossible. Rare, but it happens.
A qualified locksmith will tell you honestly if your lock can't be rekeyed. If you're unsure about your hardware, reach out via our contact page or call—we'll walk you through it.
Making the Right Decision for Your Home
Start with these questions:
Are your locks physically sound? Smooth operation, no rust, no wiggle in the bolt? Rekey. Damage, binding, or a flimsy Grade 3 lockset? Replace.
Is this purely a key-control issue? Lost keys, new home, ex-roommate with a spare? Rekeying solves it.
Do you want better security or a style update? Upgrading to Grade 1 deadbolts, adding a smart lock, or changing finishes requires replacement.
What's your timeline? Need security restored today? Rekey. Planning a renovation and want matching hardware throughout? Replacement can wait for the right product to arrive.
Most homeowners find rekeying covers 80% of scenarios. It's cost-effective, fast, and keeps quality hardware in service. Replacement shines when you're genuinely upgrading or fixing broken components.
Still not sure? A mobile locksmith can evaluate your doors in person and give you a same-day quote for both options. For more locksmith insights and tips, browse our blog anytime.