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Just Moved In? Here's How to Think About Rekeying Your Locks

The locks on a home you just bought have a history you don't know. Here's how to think through what to do about it.

September 23, 2026 · 3 min read

Just Moved In? Here's How to Think About Rekeying Your Locks

Buying or renting a home that someone else lived in first means inheriting a set of locks with a history you don't know. A previous owner might have handed out keys to a house sitter, a contractor, a family member, or an old roommate, and there's no way to know how many of those keys are still out there. It's one of those details that's easy to push to the bottom of the moving list, right after the boxes are unpacked and the internet is set up, but it's worth thinking through early.

What Rekeying Actually Means

In general trade terms, rekeying a lock means changing the internal pins inside the existing lock cylinder so that the old keys no longer work, while a new key does. The lock hardware itself, the deadbolt, the knob, the finish on the door, all stay exactly the same. Only the internal pin combination changes. It's a different process from replacing the lock outright, which swaps out the entire mechanism for a new one.

Most pin tumbler locks, which cover the large majority of residential deadbolts and doorknobs, are built to be rekeyed. A locksmith removes the cylinder, takes out the existing pins, and replaces them with a new set matched to a new key. From the outside, the door looks exactly the same before and after. The only thing that changes is which key turns it.

Rekey or Replace: What to Weigh

Whether rekeying or replacing makes more sense usually comes down to the condition and type of what's already on the door. A few general points worth thinking about:

  • If the existing hardware is in good working condition, rekeying is often the simpler route since it keeps the same locks and just changes what opens them
  • If a lock is worn out, damaged, or you want a different style or brand of hardware, replacement makes more sense
  • Rekeying multiple doors in a house to work off a single key can be convenient if the current locks are different brands or already keyed separately
  • Older or unusual lock types may limit which option is realistic, which is worth checking before deciding either way

Don't Forget the Doors People Overlook

Front and back doors get most of the attention, understandably, but a full walk-through of a new home's security is worth extending to every exterior door. Side doors, garage entry doors, and any door leading from an attached garage into the house are all doors a previous owner or tenant could have handed a key out for, just like the front door. It's an easy thing to overlook simply because those doors don't get used as often day to day.

It's Not Just About Who Has a Key

New keys aside, moving into a home is a reasonable time to just look over what's on the doors generally. JK Locksmith Co.'s residential page puts it simply: if you're having an issue with a door or lock, or you need locks rekeyed, that's the kind of thing the shop handles, and they come prepared with a range of parts and hardware since every situation is a little different.

That range of parts and hardware matters more than it might seem. Homes built across different decades end up with different lock brands, different strike plate styles, and sometimes hardware that isn't made anymore. Being ready for that variety, rather than carrying just one brand's parts, is part of what makes a straightforward job actually straightforward instead of a special order that takes another trip.

One Recent Example

This isn't only a moving-day question. E E left a review describing a related job: "Quenten installed three new deadbolts. I was a bit nervous having holes drilled into oversized, hard to replace, old doors but he did a great job and didn't rush the work. He made sure everything was done right." Older doors and unusual hardware come up often enough that it's a normal part of the work, not an exception.

Get the Locks Looked At

If you've just moved into a home in Wixom or the surrounding area and want the locks rekeyed, or you're not sure whether rekeying or replacing makes more sense for your doors, JK Locksmith Co. is a walk-in shop at 47705 West Rd, Suite B101, open Monday through Friday, 9:00 AM to 4:30 PM. Call (248) 347-1133 or send a message through the contact page with a bit of detail on what's on your doors now.

JK Locksmith Co., (248) 347-1133

Call (248) 347-1133