Should You Rekey or Replace the Locks After Moving In?

A lot of homeowners use the terms interchangeably, but rekeying and replacing a lock are two very different services. When you rekey a lock, a locksmith disassembles the cylinder inside your existing hardware and replaces the small internal pins (called key pins or driver pins) with a new set. The result: every old key stops working, and only the new key cut to match the fresh pin arrangement will operate the lock. The lock itself — the hardware, the finish, the deadbolt mechanism — stays exactly where it is. This is generally the fastest path to a fresh security slate without touching your door hardware.

Replacing a lock, by contrast, means removing the entire lockset — deadbolt, knob, or mortise lock assembly — and installing a brand-new unit. This is the right call when hardware is worn, damaged, or simply outdated. It's also the option you'll want if you're upgrading to a higher-security grade, switching lock brands (say, moving from a basic door knob lock to a Grade 1 deadbolt), or making the jump to a smart lock platform. Both services are performed on-site by a mobile locksmith, so there's no need to remove and haul hardware to a shop.

Here's how the process works in practice. A trained locksmith arrives with a rekey kit sized to your specific lock brand — Schlage, Kwikset, and similar standard cylinders each require brand-matched pin sets. The cylinder is removed from the door, the current key is used to expose the existing pin stack, old pins are swapped out for new ones of different heights, and the cylinder is reassembled and reinstalled. You're then handed a new key that matches the new pin configuration. From start to finish on a standard deadbolt, this typically takes less than 20 minutes per lock.

So can you rekey any lock? In most cases, yes — if the lock is in good working condition and uses a standard pin-tumbler cylinder (which covers the vast majority of residential deadbolts and knob locks). There are edge cases: very old or damaged cylinders may not accept new pins cleanly, and some specialty hardware (including certain mortise lock setups common in older San Antonio homes and commercial properties) requires a skilled hand and the right tooling. Disc-detainer locks and some high-security systems also have their own rekey procedures. A quick inspection by an experienced locksmith will tell you immediately whether your hardware is a candidate.

Rekeying is elegant and efficient, but there are clear situations where replacing the lock outright is the smarter investment. If the existing deadbolt or door knob lock is visibly worn — stiff to turn, loose in the door, or showing signs of forced entry from before your ownership — new hardware eliminates those mechanical vulnerabilities rather than masking them. The same logic applies if you're moving into an older home where the locks haven't been updated in 20 or more years. Security standards and materials have improved significantly, and aging hardware may not meet modern Grade 1 or Grade 2 ratings even after a fresh rekeying.

One area where full replacement is almost always the better choice is the mortise lock. Mortise locks — the rectangular, multi-component locksets you'll find recessed into the door edge on many historic San Antonio properties, older commercial storefronts along Commerce Street, and high-end residential doors — are more complex than standard cylindrical locks. A mortise lock replacement (or a full mortise lock installation on a new door) should always be handled by a professional locksmith with specific experience in mortise hardware. When the mechanism is worn or misaligned, rekeying the cylinder alone doesn't solve the underlying mechanical problem. Our team handles mortise lock service regularly across Bexar County — residential and commercial alike. If you're unsure what you have, call us at (210) 512-4768 and we can assess on arrival.

Smart locks add a layer of questions homeowners don't always think about until after the move. Can you rekey a smart lock? It depends on the specific product. Many smart locks — including several popular Yale models — do have a rekeyable cylinder on the keyed side, meaning the backup physical key entry can be rekeyed the same way as a traditional deadbolt. However, can you rekey a Yale smart lock or similar device without the original key? In most cases, no — the rekeying process for pin-tumbler cylinders requires the existing working key to align the pins during disassembly. Without it, the cylinder typically needs to be replaced rather than rekeyed. If you've moved into a home where smart locks were already installed and you don't have the original key or access credentials, let a locksmith evaluate the hardware before you assume anything — the solution may be simpler or more involved than you'd expect.

Another common question: can you rekey a lock to match an existing key — so all your exterior doors work off one key? Absolutely. This is called keying alike, and it's one of the most practical services a locksmith can perform for a new homeowner. Instead of juggling three or four different keys for your front door, back door, and side entry, a locksmith can rekey all your cylinders to a single key cut. It requires that all the locks share a compatible keyway (or that some hardware is swapped to match), but for most standard residential setups it's entirely doable in a single visit.

When homeowners ask how much a local locksmith charges, or what the typical prices for locksmith services in San Antonio look like, the honest answer is: it varies — and anyone quoting a flat number without knowing your situation is guessing. The factors that actually determine your final quote include the type and brand of lock (a basic door knob lock rekey is a different job than a full mortise lock replacement), whether it's a standard residential call or an after-hours emergency locksmith response, your location within Bexar County (travel distance factors in), and the parts needed — replacement cylinders, new locksets, or smart lock components all carry different material costs. There is no single call-out fee formula that applies universally, and cost-per-hour framing doesn't really apply to most locksmith work, which is priced by job rather than by time.

What we commit to at Bexar County Locksmith is transparency: before any work begins, we confirm an exact price and you decide whether to proceed. No surprises after the fact. Our mobile team serves the full Bexar County area — San Antonio proper, Leon Valley, Shavano Park, Universal City, Live Oak, Converse, Helotes, and surrounding communities — 24 hours a day, seven days a week. Services we provide include: residential lock rekeying, residential lock replacement, mortise lock installation and repair, commercial lock rekeying, commercial lock replacement, commercial locksmith services for office and retail properties, master key system setup, keying-alike across multiple doors, smart lock installation, smart lock rekeying and reconfiguration, high-security deadbolt upgrades, Grade 1 deadbolt installation, door knob lock replacement, door lever replacement, keypad lock installation, electronic access control installation, emergency locksmith response for home lockouts, emergency locksmith response for business lockouts, car lockout service, automotive key replacement, transponder key programming, key fob replacement and programming, ignition repair and replacement, motorcycle lockout service, broken key extraction (residential), broken key extraction (automotive), safe opening and combination changes, and lock hardware consultation for new construction or remodels. Whether you've just moved in or you've owned your home for years and are finally getting around to that security upgrade, we have the tools and experience to get it done right.