Rekeying vs. Replacing Locks: Which Is Better and Cheaper for Your Home?
Picture this: you just bought a house, and the previous owner swears they handed over every copy of the keys — but can you really be sure? That single moment of doubt is exactly why homeowners across the country face the same decision every year: rekey the locks you already have, or rip them out and start fresh. The right call depends on your budget, your hardware, and exactly what kind of security gap you're trying to close.
Rekeying vs. Replacing Locks: The Basic Difference Nobody Explains Well
Most homeowners assume these two services are basically the same thing with different price tags. They're not. Rekeying means a locksmith opens up the existing lock cylinder and swaps the internal pins so your old keys stop working and a new set takes over — the hardware on your door stays exactly the same. Replacing means the entire lock, including the cylinder, housing, and sometimes the strike plate, gets pulled off the door and a brand-new unit goes in its place.
Think of rekeying as changing the combination on a safe you already own, while replacing is like buying a whole new safe. One works with what's already installed; the other starts from zero. This distinction matters because it drives almost every other decision in this article — cost, timeline, and how much of an upgrade you actually get for your money.
A licensed locksmith can typically rekey a standard residential lock in under 15 minutes per door once they're on site. Replacement takes a bit longer since it involves removing screws, fitting new strike plates, and sometimes adjusting the door itself if the bore holes don't line up perfectly. Neither option is inherently "better" — it's about matching the service to your actual problem, not just picking whichever sounds more thorough.
