Rekey or Replace? Which Is Actually Cheaper for LA Homeowners

Rekeying means a skilled technician opens your existing lock cylinder and swaps out the tiny internal pins so that the old key no longer works. The hardware on your door — the lock body, the handle, the strike plate — stays exactly where it is. You walk away with new keys and a lock that's effectively a stranger to whoever held the old ones. Replacing, on the other hand, means removing the entire lock assembly and installing brand-new hardware from scratch, pins, cylinder, body, and all.

Rekeying is almost always the faster job per lock. But 'per lock' is the critical phrase. The total cost of any locksmith visit is shaped by several factors: the type and brand of lock (a standard Kwikset door knob lock rekeyed quickly is very different from a specialty mortise lock that requires more hands-on disassembly), the number of locks on the property, the time of day you call, travel distance to your address, and whether any parts need to be sourced or ordered. At Los Angeles Locksmith Pros, we confirm an exact up-front price before a single screw is touched, so there are never surprise charges at the end of a job.

Here's where most online calculators fall short. A mortise lock is fundamentally different from the cylindrical locks most people picture. It's a rectangular lock body that fits into a deep pocket — a mortise — cut into the door edge, with a separate cylinder that accepts the key. You'll find mortise locks all over older Los Angeles homes, in Craftsman bungalows in Pasadena, Spanish Colonial revivals in Los Feliz, and mid-century buildings throughout the Wilshire corridor. They are robust, high-security locks that can last decades, but working on them takes more time and specialized experience than a standard door knob lock.

When a mortise lock is in good mechanical shape, rekeying it can be a genuinely smart call — you preserve the quality hardware and simply revoke access from old keyholders. When the mortise lock is worn, the bolt doesn't throw cleanly, or the trim is damaged, replacement makes more sense even if the upfront work is more involved. Our experienced technicians assess the condition of your existing mortise lock hardware before recommending either path, because the right answer depends on what's actually on your door, not a generic rule of thumb.

Think of every locksmith visit as having two components: the service call itself and the per-lock work. The service call portion — getting a trained professional to your door in Los Angeles traffic, whether you're in Encino, Echo Park, or anywhere along the 405 corridor — is a fixed cost regardless of how many locks get touched. That means rekeying a single lock and rekeying five locks are very different value propositions per lock, even if the per-lock labor is identical.

Here's the practical math in plain terms. If you have one exterior lock and the hardware is newer, the service call cost is spread across just one rekey — the savings over replacement exist but are modest. Add three or four locks to that same visit, and the rekey option becomes substantially more efficient, because you're applying one service call cost across multiple locks with relatively fast per-lock labor. Conversely, if your door knob lock is wobbly, your deadbolt is a decade past its prime, and you want to upgrade to a smart lock or a high-security mortise lock, replacement earns its cost across that same visit by delivering lasting improvements. The tipping point for most LA single-family homes sits somewhere around three or more quality locks — below that, replacement may be worth the upgrade; at or above that number in good hardware, rekeying almost always wins on value.

Rekeying wins when: you've just purchased a home and the existing locks are high-quality (especially a mortise lock in solid condition), a tenant or roommate has vacated and you want to revoke access quickly, you've lost a key and aren't sure how many copies are floating around, or you want all your exterior locks to work on one key (called a master key system or keyed-alike setup). In every one of these cases, the hardware itself is not the problem — access control is, and rekeying solves that cleanly and efficiently.

Replacement wins when: your lock is visibly damaged, corroded, or failing mechanically, you're upgrading to a higher-security lock grade (moving from a builder-grade door knob lock to a commercial-grade mortise lock, for example), you want to add smart lock functionality, or your door has been forced and the frame or lock body is compromised. If you've had a break-in attempt — a real concern in dense neighborhoods like Koreatown or North Hollywood — replacement is often both a security upgrade and a peace-of-mind investment that rekeying simply can't replicate. When you're unsure which situation you're in, calling Los Angeles Locksmith Pros for an honest assessment costs nothing — reach us any time at (818) 875-9120 and we'll talk through your door before you commit to anything.

Questions like 'How do I know if a locksmith is legit?' and 'What is a master locksmith?' come up constantly, and they deserve straight answers. In California, locksmiths are required to register with the Bureau of Security and Investigative Services (BSIS). Any professional coming to your door should be able to show identification and their registration number. A master locksmith is a technician who has demonstrated advanced proficiency across a wide range of lock types, security systems, and access control hardware — it reflects depth of training, not just time on the job.

Beyond credentials, legitimate locksmiths give you a firm, confirmed price before starting work — never a low quote over the phone that balloons once they're at your door. They arrive in a marked vehicle, carry professional tools, and don't pressure you into unnecessary replacements. At Los Angeles Locksmith Pros, our technicians are trained, experienced, and insured, and we operate as a fully mobile 24/7 team serving the entire Los Angeles area. Whether you're dealing with an emergency locksmith situation at 2 a.m. in Van Nuys or a scheduled rekey in Brentwood on a Tuesday morning, the standard of service is identical — and the price is always confirmed up front. For emergency locksmith service near you, one call to (818) 875-9120 connects you directly to our dispatch, around the clock.

Los Angeles homeowners, renters, and business owners often don't realize the full range of work a qualified mobile locksmith team handles. Here is what our technicians cover on every call: residential lock rekeying, mortise lock installation and repair, door knob lock replacement, deadbolt installation, smart lock setup and programming, master key system design, high-security lock upgrades, lockout service for homes and apartments, key duplication, broken key extraction, lock cylinder repair, sliding door lock service, gate lock installation, mailbox lock replacement, window lock installation, garage door lock service, padlock rekeying, panic bar and push bar installation, commercial locksmith services for storefronts and offices, access control system installation, intercom and keypad lock integration, car lockout service, automotive key programming, transponder key replacement, ignition lock cylinder service, safe opening and combination changes, and after-hours emergency locksmith response across all Los Angeles neighborhoods. Whether it's a standard door knob lock on a rental unit or a century-old mortise lock on a historic Highland Park home, our team has the tools and training to handle it correctly the first time.