Why Rekeying Matters When You Move
You don't know who has keys to your new place. The previous owner, their relatives, contractors, house cleaners, dog walkers — any of them could have made copies. Even if you trust the seller, you can't control what happened before they owned it.
Rekeying changes the internal pin configuration so old keys no longer work. You keep the same hardware, same finish, same deadbolts. New pins, new keys. It takes minutes per lock and costs a fraction of full replacement.
Most pin-tumbler deadbolts and knob locks can be rekeyed. Wafer locks (common in older doors) usually can too. If your locks are damaged, corroded, or use outdated keyways, replacement makes sense. Otherwise, rekey first.
Rekey vs. Replace: What's the Difference?
Rekeying swaps the pins inside the cylinder so a new key operates the lock. The deadbolt, strike plate, and exterior hardware stay in place. A locksmith does this in 10–15 minutes per lock on site.
Replacing means removing the entire lock assembly and installing new hardware. You'd do this if the lock is broken, the finish doesn't match your style, or you want to upgrade to ANSI Grade 1 deadbolts for better security. Replacement takes longer and costs more — new locks plus labor.
If your existing locks work and you just want control over who has keys, rekey. If you're upgrading security or the locks are worn out, replace. A mobile locksmith can assess on the spot and quote both options before starting work.
When to Rekey Immediately
Rekey the day you move in if:
- The previous owner gave you only one or two keys — a sign copies exist elsewhere.
- The property was a rental. Tenant turnover means multiple key sets floating around.
- You bought a foreclosure or estate sale. Unknown key distribution.
- Contractors did renovation work before closing. Builders and painters often keep keys during projects.
Even if the seller seems trustworthy, you're paying for peace of mind. It's not about suspicion — it's about control. One rekeying session secures every entry door, and you can add garage side doors or back gates to the same service call.
How Long Does Rekeying Take?
A standard single-family home with three to five locks takes 30–60 minutes total. Each lock is disassembled, pins are replaced to match your new key, then reassembled. If you want all locks keyed alike (one key opens every door), that's a single key cut and one pin set across all cylinders.
Commercial properties or homes with high-security locks take longer. Medeco, Mul-T-Lock, and other restricted keyways require special pins and blanks. A locksmith will tell you up front if your hardware needs extra time or parts.
Mobile locksmiths carry pin kits and key blanks on the truck. No need to drop off locks at a shop or wait days. Schedule a visit, and you're done in under an hour most times.
What Rekeying Costs (and How to Save)
Expect $20–$35 per lock for standard residential rekeying. That includes labor, new pins, and key cutting. If you rekey multiple locks at once, many locksmiths discount the per-lock rate — ask when you call.
Big-brand locksmith chains often charge trip fees on top of per-lock pricing. A $99 service call plus $30 per lock adds up fast. Half Off Locksmith quotes flat-rate pricing before dispatch — no hidden trip charges. You know the total cost before anyone shows up.
Replacing locks runs $75–$150 per lock depending on the deadbolt grade and finish. ANSI Grade 1 deadbolts (the strongest residential rating) cost more than Grade 3, but they resist kick-ins and drilling. If you're replacing anyway, upgrade the strike plate to a reinforced model with 3-inch screws into the door frame.
Should You Rekey or Change Smart Locks?
Smart locks and keypad deadbolts don't use traditional keys, so rekeying doesn't apply. Instead, reset the lock to factory settings and create new access codes. Delete any codes the previous owner set.
If the smart lock uses a backup mechanical key (many do), rekey that cylinder. The electronic part handles day-to-day access, but the physical keyway is still a potential entry point. A locksmith can rekey the cylinder without removing the smart lock electronics.
Check the lock's app or manual for a master reset procedure. Most require a pin-hole reset button or a specific button sequence. After reset, pair the lock with your phone and set new codes. If you're not sure how, a mobile locksmith can walk you through it or handle the reset on site.
Other Security Steps After Moving In
Rekeying is step one. Also consider:
- Reinforce strike plates. Most builder-grade deadbolts use short screws that pull out under a hard kick. Swap in 3-inch screws that anchor into the stud behind the frame.
- Add a deadbolt if you only have a knob lock. Knob locks (spring latches) are easy to bypass. A Grade 1 or Grade 2 deadbolt adds real resistance.
- Check window locks. Ground-floor windows are common entry points. Make sure sash locks work and consider adding window pins or security film.
- Garage door keypads. Change the code if one is installed. Old codes might still work.
Layered security beats any single upgrade. Start with the locks, then work outward. A locksmith visit is a good time to ask about strike plates, deadbolt upgrades, and other weak points you might not notice on your own.