Cost Per Lock: Is It Cheaper to Rekey or Replace?

To rekey a lock means to change the internal pin configuration inside the lock cylinder so that the old key no longer works and a new key operates it instead. The lock hardware — the knob, deadbolt, handle, or mortise lock body — stays exactly where it is. Only the tiny pins inside the cylinder are swapped out, which is why the process is typically faster and involves fewer parts than a full swap. When people search for how to rekey a lock, they are usually asking whether a professional can make their existing hardware respond to a brand-new key, and the answer is almost always yes, provided the lock is in reasonable working condition.

Replacing a lock, by contrast, means removing the entire lock assembly and installing a new one. This makes sense when the hardware is damaged, worn, outdated, or when you want to upgrade to a higher-security option — say, moving from a basic door knob lock to a heavy-duty mortise lock with a reinforced strike plate. A mortise lock, which fits into a deep rectangular pocket cut into the door edge rather than sitting on the surface, offers significantly more resistance to forced entry and is a service our team handles regularly throughout the Greenville area. The choice between rekeying and replacing really comes down to the condition of your current hardware and how much of a security upgrade you want.

There is no single flat rate for either service, and any honest professional will tell you the same thing. What determines the final price per lock is a combination of variables: the type and brand of lock (a Schlage B-series deadbolt is different to service than a vintage mortise lock), whether the job is done during standard hours or as an emergency locksmith call in the middle of the night, how far the technician needs to travel to your location, and what parts are required. Rekeying generally involves fewer parts — a rekey kit with replacement pins specific to the lock brand — while replacement involves purchasing and installing entirely new hardware.

Time of day matters more than many homeowners expect. A straightforward daytime rekey on a standard door knob lock involves different logistics than a 2 a.m. call after a break-in attempt near the Brandywine Creek Greenway. Emergency locksmith service requires a technician to mobilize immediately regardless of other scheduling, and that urgency is reflected in the quote. The same logic applies to specialty hardware: rekeying or replacing a commercial-grade mortise lock takes more time and more specialized components than swapping pins in a basic residential knob. Our process is simple — we confirm the exact up-front price before any work begins, so you are never surprised by the final number.

Rekeying is the right call when the lock itself is in good condition and your only concern is controlling who has a working key. Classic scenarios include moving into a previously owned home, ending a rental tenancy, recovering from a lost or stolen key, or wanting to rekey a lock to match existing key sets so that one key opens multiple doors — a convenience upgrade that locksmiths accomplish by matching the pin depths across several cylinders to a single key cut. How long does it take to rekey a lock? On a standard residential deadbolt or door knob lock, an experienced technician typically completes the process in ten to twenty minutes per cylinder once on site, though that window extends for high-security cylinders or mortise locks with more complex internals.

The process itself — what happens inside the lock cylinder — involves removing the cylinder from the lock body, extracting the existing driver pins and key pins using a plug follower tool, replacing them with a new set of pins matched to the new key's cut depths, and reassembling everything. Homeowners sometimes ask about how to rekey a lock cylinder themselves using retail kits, and while kits exist for common brands like Kwikset, the process requires careful handling of very small components and a precise understanding of pin heights. A mistake can leave you locked out or with a cylinder that binds. For anything beyond basic practice, having a qualified professional handle it protects the hardware and your time.

Full replacement becomes the practical choice — and sometimes the only choice — in several situations: the lock is damaged from a forced-entry attempt, the mechanism is worn to the point where it binds or sticks, you are upgrading the door entirely, or you want to move to a higher-security lock type. This is where the conversation about mortise locks becomes especially relevant for Greenville homeowners. Many older properties along the Kennett Pike corridor feature original mortise lock hardware that is decades old. A trained locksmith can assess whether that hardware is worth rekeying or whether a modern mortise lock replacement would give you meaningfully better security without requiring door modifications.

Replacement also makes sense when you are consolidating a property's access control — for instance, a homeowner adding a smart lock to the front door while upgrading a side-entry door knob lock to a deadbolt at the same time. As a commercial locksmith service as well as a residential one, our team handles everything from single-family homes to small business storefronts, and the per-lock calculus is similar: condition of existing hardware, desired security level, and whether the door prep already accommodates the new lock. When we arrive, we carry a range of hardware so that the conversation about options is immediate and practical, not a return trip away. If you are weighing a significant hardware upgrade, call (704) 850-6756 and our team can walk you through your options before you commit to anything.

Locksmithing is a genuinely specialized trade, and understanding the different areas of expertise helps you ask better questions. Residential locksmiths focus on homes — rekeying, lock replacement, lockouts, and safe work. Commercial locksmiths handle master key systems, access control panels, and heavy-duty mortise lock hardware used in office and retail environments. Automotive locksmiths deal with transponder keys, key fob programming, and ignition work. A full-service mobile operation like ours covers all three, which matters when a single call involves both a home entry door and a vehicle in the driveway.

The terminology homeowners encounter can also be confusing. Rekeying, re-pinning, and recombinating all refer to the same core process — changing the pin stack inside a lock cylinder. A key fob is a separate electronic device from a traditional cut key, and programming one involves syncing it to a vehicle's onboard computer rather than cutting metal. On the regulatory side, locksmith licensing requirements vary significantly. In the United States, there is no single federal standard — some states require formal licensing and background checks while others have no specific requirement at all, which is why verifying that a locksmith is insured and carries identifiable credentials matters regardless of where you live. In the United Kingdom, the trade is similarly unregulated at the national level, though industry bodies set voluntary standards. Here in Delaware, the profession operates under general contractor and business registration frameworks rather than a dedicated locksmith license, making it especially important to work with insured professionals who stand behind their work with a clear, up-front quote.

A few questions come up on nearly every call, and they deserve straight answers rather than vague reassurances. Can a locksmith make a key from a lock? Yes — a process called impressioning or decoding allows a skilled technician to create a working key by reading the lock's internal pin configuration, even without an original key present. This is different from picking a lock and is a legitimate, professional technique used routinely for lockouts and estate situations. How much is a locksmith per lock? As covered above, the price depends on lock type, time of day, parts, and travel — we provide the exact figure before starting. Should I tip my locksmith? It is never expected and always appreciated, the same as any skilled trade service call.

How long does it usually take for a locksmith to come? Our mobile team serves the Greenville area around the clock, and response times depend on current call volume and your exact location — we give you an honest estimated arrival time when you call. Can a locksmith program my key fob? Yes, for most makes and models, fob programming is part of our automotive services alongside key cutting and ignition work. How much is the average locksmith charge? Again, no honest answer exists without knowing the specific job details — but every call with us starts with a clear, confirmed price so you know exactly what you are agreeing to before we touch anything.