What does key duplication actually involve?
Key duplication sounds like the simplest job in the trade, and when it is done well it is. A blank that matches your key's profile is cut so each depth and spacing follows the original. The copy slides in, turns without force, and works as smoothly as the key you handed over. The trouble starts when the cutting is a little off. A copy that is slightly out of spec might turn on a fresh lock but bind in one that has seen years of use, or it might work for a month and then start wearing the pins and cause problems for both keys.
That is why we treat a spare house key as a precision part, not a throwaway. A good copy starts with a good look at the original: is it worn, bent, or itself a copy of a copy? Each generation of copying can add a little error, and a tired original produces a tired duplicate. When the original is in rough shape, we say so and talk through the better route, which is sometimes cutting a fresh key by the lock's code or having us look at the cylinder itself.
If you are in Cerritos and need duplicate keys for a house, an apartment, an office, a mailbox, or a deadbolt, you can call us at (213) 577-1366 at any hour. Key copying is a routine request, but we still ask a few questions first, because the key in your hand decides what can be done.
Which keys can we copy, and which need more care?
Most everyday keys are straightforward. Here is how the common categories break down for our customers in Cerritos:
- House key copy: standard residential keys for entry knobs, lever handles, and deadbolts. This covers most spare house key requests.
- Duplicate deadbolt key: deadbolts often use a different key from the knob, or one key for both. We check what you have before cutting so you do not end up with a copy that fits only half the doors.
- Apartment key copy: fine when the key is an ordinary one and you are the tenant or owner. Some buildings use restricted keys, and those follow the rules below.
- Office key duplication and commercial key duplication: standard office-door and file-cabinet keys are routine. Keys tied to a master key system need to be handled with the system owner's involvement.
- Mailbox key duplication: private mailbox keys are usually small and simple, but not every mailbox lock is ours to copy, as covered later on this page.
- High security key duplication and restricted key duplication: possible in many cases, but they require authorization and sometimes factory-controlled blanks.
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We answer around the clock, every day of the year.
Call (213) 577-1366What about high-security and restricted keys?
Some keys are deliberately hard to copy. Restricted keyways are sold under controlled programs so that only the registered owner or an authorized contact can order more keys. Others use a high-security design with unusual cuts, sidebars, or small internal elements that a basic cutting machine cannot reproduce. If your key says something like 'Do Not Duplicate', that stamp is a request, not a technical barrier, but it often signals a restricted system, and we handle it as one.
With a true restricted key, we ask for proof that you are the authorized party, such as a card, an account record, or confirmation from the property owner or facility manager. We would rather slow down for a few minutes of paperwork than cut a key that compromises someone's security. In some cases the manufacturer or an authorized dealer has to supply the blank or approve the order, and we will tell you plainly if that is where things stand. We do not pretend every key is available on the spot.
If you are weighing whether to move to a controlled keyway so that nobody can copy your keys freely, that is a lock decision rather than a copying decision. Our high-security locks page explains how those systems work and what the tradeoffs are.
How do we handle a duplication request, step by step?
There is nothing mysterious about the process, and you should know what to expect before anyone cuts anything.
- You call (213) 577-1366 and describe the key: where it fits, any brand stamped on it, and whether it is marked restricted. A photo of both sides of the key helps.
- We tell you whether the key can be copied as-is, needs authorization, or is better replaced through another route. If it is something we can only cut at the storefront, we say so.
- We inspect the original. A worn or bent key is flagged before we copy it, because the copy will inherit every flaw.
- The blank is matched to the original by keyway and profile, then cut to follow the original's depths and spacing.
- We deburr the new key, then test it. A good copy should enter smoothly, turn without forcing, and release cleanly.
- We cycle the lock with the copy when we can, so you leave knowing both keys work in the real lock and not just on the bench.
What affects the cost of key duplication?
We do not quote numbers on a web page, because the honest answer depends on the key in your hand. These are the factors that move the cost up or down:
- Key type: a plain residential key is the lighter-cost end of the range. Specialty and high-security keys involve harder-to-source blanks and more precise cutting.
- Restricted or controlled keyways: these may require manufacturer authorization or ordering, which adds steps and handling.
- Quantity: a single spare is a small job. A set for a family, a staff, or a rental unit takes more blanks and more time.
- Condition of the original: a worn key can require extra work, or we may recommend a better route than copying it.
- Where the work happens: coming to you takes more of our time than a visit to the storefront, and the 29 miles between Cerritos and our Westwood location is part of that picture.
- Time of day: our phone is answered around the clock, and after-hours calls are handled differently from daytime ones.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Why call Wilshire Lock & Key for duplicate keys?
We have been in business since 1987, and most of what we know about keys comes from decades of cutting them, fixing the problems bad copies cause, and explaining to people why a copy that almost fits does not fit. We operate from a storefront at 10740 Wilshire Blvd in Westwood and send out mobile service vans, so we are not a call center that hands your job to whoever picks it up. When you call (213) 577-1366, you are reaching the company that will do the work, not a dispatch middleman.
David, the owner and lead technician, oversees how we do things. That matters most on the judgment calls: whether a worn original should be copied at all, how to treat a restricted key, or whether a duplicate is the wrong fix for your situation.
California requires locksmith companies to hold a Locksmith Company license (LCO) through the Bureau of Security and Investigative Services (BSIS). Whoever you hire, ask to see that license number. It is a reasonable question, and a reputable locksmith should expect it.
Key duplication around Cerritos: what we see locally
Cerritos grew out of the Dairy Valley farmland in the 1960s and 1970s, and the housing reflects it: ranch and two-story stucco tract homes, mostly owner-occupied. In neighborhoods like Cerritos Terrace and Concord Place, the same family may have held a house for decades, which means the original keys have often been copied and re-copied. That is the situation where we pay the most attention to the original's condition, because a worn master key makes poor copies. If you are in the 90703 ZIP and your spare house key sticks, we would much rather cut a clean copy from a decent key than a fifth-generation duplicate of a tired one.
Shadow Park is a gated enclave of roughly 394 homes built in the late 1970s, with staffed gate access. Residents there tend to want extra keys for family members, house sitters, and service providers, and we can copy the mechanical keys for the home. Gate remotes, cards, and entry lists are controlled by the community, so those are handled with the association. If gate hardware itself needs work, see our gate lock repair page.
Around the Cerritos Towne Center and along the townhome and condo corridors, apartment key copy and mailbox requests come up more often. Management may control which keys can be duplicated, so check with your landlord or association before you ask for a copy.
In the Cerritos Industrial Park, warehouse and office keys are a different matter. A business there often needs several identical keys for staff, and sometimes a key that must stay under controlled distribution. We handle commercial key duplication with that in mind, and we can help you decide whether a master key system would be cleaner than a drawer full of loose copies.
Climate plays a small part. Cerritos sits inland, so summer afternoons run warmer than in coastal cities, and a sun-exposed door can expand slightly. Sometimes a lock that binds in the afternoon is a door-fit issue, not a key problem, and a new copy will not fix it. Salt corrosion, on the other hand, is not a meaningful factor here, so keys and cylinders generally age from use rather than from the air.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Can you come to us in Cerritos, or do we visit you?
Both options exist, and the right one depends on the key. A lot of people prefer that we come to them, whether they are at home, at an office, or locked into a busy day. Our mobile locksmith service covers Cerritos, and it makes particular sense when you need several keys tested against the actual lock, when you cannot leave a business, or when the original key is too valuable to carry around.
Some keys are better handled at our Westwood storefront, particularly specialty or high-security blanks and anything that needs more bench time. When you call (213) 577-1366, we tell you which route fits your key so you do not make a trip for nothing.
Our location is about 29 miles from Cerritos, so we are upfront that travel is part of mobile work. If you only need one ordinary spare and plan to be in the area anyway, a stop at the storefront is usually the more economical route. If convenience or the lock's condition matters more, we come to you.
When is a copy not the right fix?
Duplication solves one problem: you need another working key. It does not solve a security problem. If a key has been lost, you have no idea who holds the copies, or a former tenant or employee kept theirs, then cutting yet another key leaves the old ones working. In that case, lock rekeying changes the pins inside the lock so the old keys stop working and you start fresh. It is common for 1960s-70s tract homes in Cerritos, where the original keys have travelled a long way over the years.
A few other situations call for a different service. If a key has snapped in the lock, our broken key extraction service comes first, because you cannot copy a key until you have the pieces. If the mailbox lock itself is damaged or its key has gone missing, mailbox lock replacement may be the real answer. And if you are chasing a car key instead of a house key, the car key replacement page covers that work. Vehicle keys often involve chip programming and sometimes dealer-only steps, and we confirm what applies to your car by VIN or in person rather than guess.
We would rather point you to the right service than sell you a copy that does not fix what is wrong.
Frequently asked questions
Can you copy a key if I only have one and it is worn?
Often yes, but we look at it first. A worn original produces a worn copy, and it may not operate the lock any better. If the key is badly worn, we may suggest cutting by the lock's code or checking the cylinder itself. We tell you which route we recommend before we cut anything.
Can you duplicate a key stamped 'Do Not Duplicate'?
That stamp is a request, not a technical block, but it usually means the key belongs to a controlled system. We ask for proof you are authorized, such as a property manager's approval or a registered card. If we cannot confirm, we will not cut it, and we explain why.
Do you make duplicate deadbolt keys?
Yes. Deadbolts sometimes use a different key from the doorknob, and in other homes one key does both. Tell us what you have, or send a photo, so we cut the right copy. We try the new key in the deadbolt when we can, so you know it works.
Can I get a mailbox key copied?
It depends on whose mailbox it is. A private mailbox or a lock owned by your building or association can often be copied with the right permission. If it belongs to the postal service, the keys are controlled and we cannot copy them. If the lock or key is lost, replacement may be the better route.
Can you come to my house or office in Cerritos to cut keys?
Yes, our mobile vans serve Cerritos. Whether a given key can be cut at your door or needs our Westwood storefront depends on the key, and we tell you when you call (213) 577-1366. Phones are answered 24 hours a day, 7 days a week.
I rent an apartment. Can I make my own spare?
Check your lease and ask your landlord or property manager first. Many buildings control copies, particularly for restricted keys. If copying is allowed and the key is a standard one, we can usually cut it. If the key is restricted, we may need written approval from management.
How many copies should I make?
For a home, most people want one for each adult, plus one kept somewhere safe and trusted. For a business, think about who needs access and keep a record of who holds which key. If you cannot account for existing copies, rekeying is better than adding more.
Can you copy a high-security key at the same visit?
Sometimes. It depends on the keyway, whether the blank is available, and whether the system is restricted. Some high-security keys need manufacturer authorization or ordering. We tell you what applies to your key on the first call rather than promise something we cannot confirm.
Do you copy car keys too?
Car keys are a separate job from house keys because many involve chips or remote functions. Whether yours can be done by cutting alone, programming, or a dealer-only step is something we confirm by VIN or in person. Our car key replacement page explains the process.
More locksmith help in Cerritos
Key Duplication near Cerritos
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.
