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Wilshire Lock & Key

24/7 locksmith · Paramount, CA

Master Key System in Paramount, CA

Wilshire Lock & Key designs and installs master key systems in Paramount, CA: one key for the manager, separate keys for each door, and restricted keyways that stop casual copying. We answer 24 hours a day, 7 days a week at (213) 577-1366, and David oversees every system design.

  • Since 1987
  • Westwood storefront + mobile vans
  • A person answers, day or night
Lock cylinder, follower and pinning kit on a workbench during a rekey

What does a master key system actually do?

A master key system lets different keys open different sets of locks inside the same property. Every door has its own key, usually called the change key. A master key opens a whole group of doors. Above that, a grand master can open several groups. A tenant's key opens one apartment, the property manager's key opens all the apartments, and the owner's key opens everything including the utility rooms. It all comes down to how the pins inside each cylinder are arranged, so that more than one key will turn the same lock.

This is not the same thing as keying locks alike. Keyed-alike means one key opens every lock, which is simple but gives you no hierarchy and no way to separate one person's access from another's. A master key system is the opposite idea: many keys, each with a defined reach, and a paper record of who can open what.

There is an honest tradeoff, and you should hear it from us before you buy. Because each cylinder accepts more than one key, a master-keyed lock gives up a little resistance to picking and key-bumping compared with a single-key lock. Good design, tight record keeping, and a restricted keyway bring that back under control. We will also tell you when a particular door, such as a server closet or a safe room, is better left off the system entirely.

Where does key control go wrong in a building?

Most people call us about a master key system after a problem has already shown up. It rarely starts with a break-in. It starts with a key ring nobody can identify, a manager carrying a separate key for every door, or a former employee who still has a key to the back entrance and nobody is sure which locks it fits.

These are the situations that usually lead to a conversation about a business master key system, an apartment master key system, or an employee key control system:

  • A property has grown door by door, and now has a dozen different keys that all look alike.
  • A manager, maintenance person, or cleaning crew needs wide access, but the rest of the staff should not have it.
  • A key has gone missing and the only fix is rekeying every lock, one at a time, with new keys for everyone.
  • Tenants or employees copy keys at a corner kiosk, and nobody knows how many copies exist.
  • A building changed hands and the previous owner's keys are still out in the world.

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How do we design and install a master key system?

A master key installation is mostly planning, and the planning is where a system either works for ten years or becomes a headache in two. Here is how we run it from the first call.

  1. We talk through who needs to open what: owners, managers, maintenance, tenants, staff, vendors. We also list every opening that takes a key, including gates, storage rooms, mailboxes, and utility doors.
  2. We look at the existing hardware on site. Some cylinders can be rekeyed into the system, and some are worn, mismatched, or built to a type that cannot be master keyed, so they get replaced.
  3. We draw the hierarchy on paper before any pin is touched: change keys, group masters, and a grand master where it makes sense. We decide which doors stay off the system.
  4. We choose the keyway. A standard keyway is the lighter-cost route. A restricted keyway adds copy control, and we explain what it does and does not protect against.
  5. We pin or cut the cylinders to the plan and assign each key a record, so the system can be extended or repaired later without starting over.
  6. We install, then test every key on every lock. Each change key should open only its own door, and each master should open only the doors it was meant to.
  7. We hand over the key schedule and explain how to track keys: who has which one, and what to do when one comes back or goes missing.
  8. We leave room for growth. If you may add doors, we plan the system so new locks can join it without redoing the old ones.

What are restricted keyways and duplicate-protected keys?

A standard key blank can be bought almost anywhere, so any copy shop can duplicate a standard key in a few seconds. A restricted keyway uses a key profile whose blanks are controlled by the manufacturer, and duplicate-protected keys are stamped so that copying generally requires proof of authorization. Together they give you a restricted key system: a real barrier to casual copying and a paper trail for anyone who is supposed to be able to copy a key.

We will be straight about the limits. No key is impossible to copy for someone determined and equipped, and restricted blanks can take longer to get than ordinary ones. What a restricted system does well is stop the everyday leak: the employee who copies a key on the way home, or the tenant who hands out spares. You can read more about the hardware side on our high-security locks page, and about ordinary copies on our key duplication page.

For a small shop with a handful of employees, a restricted keyway is worth considering mainly if you have turnover or shared access. For an apartment complex or a multi-tenant building, it is usually the first thing we recommend, because the number of people holding keys is large and the turnover is constant.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

How much does a master key system cost in Paramount?

We do not quote a master key system over the phone without knowing the doors, because the work varies too much. What we can do is tell you exactly what moves the cost up or down, so you can plan around it.

The biggest factors are these:

  • The number of locks that need to join the system, since each cylinder has to be pinned or replaced to the plan.
  • How many levels the hierarchy has. A simple two-level system is a smaller job than a grand-master system with several groups.
  • Whether your existing cylinders can be rekeyed or have to be replaced. Rekeying what you already own is usually the more economical route, and our lock rekey service covers that part.
  • The keyway you choose. A restricted keyway and duplicate-protected keys cost more than a standard profile, and the blanks and key control cards add to the job.
  • The grade and type of cylinders and hardware. Heavier-duty cylinders for exterior and shared doors cost more than light interior ones.
  • How many keys you need cut, and how many people will carry them.
  • Doors that need more than a cylinder swap, such as worn latches, bent strikes, or gate hardware that has to be fixed before any key will work smoothly.

Why call Wilshire Lock & Key for a master key system?

A master key system is a long-term decision, and the company that sets it up is the one you will call when something changes. Here is what we can honestly offer.

  • We have been in business since 1987, and master keying is a field where experience matters, because most mistakes only show up years later.
  • We run a storefront at 10740 Wilshire Blvd in Westwood plus mobile service vans, so planning, parts, and on-site work all come from one company.
  • We are one company, not a dispatch service passing your job to whoever is free. The person who plans your system is part of the team that installs it.
  • David, the owner and lead technician, oversees the system design, because the hierarchy is the part that cannot be fixed with a quick patch later.
  • Our phone at (213) 577-1366 is answered 24 hours a day, 7 days a week, year-round, so a lost master key at night gets a real conversation and not a voicemail.

Where do master key systems fit around Paramount?

Paramount was formed in 1948 from the dairy towns of Hynes and Clearwater, and you can still hear those names in the Hynes and Clearwater historic districts. The city has a high renter share, and a lot of its buildings are 1960s to 1980s apartment complexes. That is exactly where master key systems earn their keep. We are based about 23 miles away in Westwood and serve all of 90723 with mobile vans.

Here is how master key work tends to line up with the parts of town we hear about:

  • Paramount Boulevard corridor and Downey Avenue corridor: apartment complexes where a manager needs every unit, the laundry room, and the trash enclosure, while each tenant should open only one door. Lockouts and mailbox lock work are common here, and a master key system keeps those problems from turning into key-ring chaos. If you own rental property, our locksmith for landlords page covers the wider picture, and our mailbox lock replacement service handles that hardware separately.
  • Alondra Boulevard corridor and the Garfield Avenue industrial area: warehouses and industrial buildings where shift supervisors, maintenance, and delivery staff need different levels of access. Panic-bar doors and rear exits have to be part of the plan, and our panic bar installation page explains the exit-hardware side.
  • Somerset Boulevard area, Rosecrans Avenue corridor, and the Progress Park area: smaller businesses and mixed properties where a restricted keyway can stop key copies from leaving with a former employee.
  • Near the Paramount Swap Meet: storefronts and roll-up gates where the same set of keys often covers a front door, a gate, and a storeroom. If you manage several vendor spaces, a hierarchy makes it clear who can open what. For the gate hardware on its own, see our gate lock repair page.
  • Mobile home parks: shared facilities such as laundry rooms, offices, and gates can be placed on one system, with each resident's door left independent.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

What does the Paramount setting change about a master key job?

Paramount sits on a flat southeast-county coastal plain with a morning marine layer and mild temperatures. Salt-air corrosion is not a meaningful factor here, so we are not specifying special finishes for cylinders. Damp winters can swell older wood doors, though, and that matters more than people expect. A swollen or sagging door makes a key bind, people force it, and a worn key in a master-keyed cylinder causes more trouble than in a single-key lock, because there are more pin positions that have to line up. We check the door's fit before we blame the cylinder.

Most of Paramount's single-family homes are small 1940s and 1950s houses, and these almost never need a master key system. A homeowner who wants one key for the front and back doors is better served by a simple rekey. Security screen doors are common on both houses and apartments, so on apartment jobs we also check whether the screen door's lock needs to be keyed into the plan or left alone.

What should you ask any locksmith before agreeing to a master key system?

California requires locksmith companies to hold a license from the Bureau of Security and Investigative Services (BSIS), called an LCO license. Ask any locksmith you are considering for it, and verify it with the state. That goes for us too. We are glad to answer questions about our credentials, and our license number is being added to this site.

Beyond that, these questions separate a solid system from a fragile one:

  • Who keeps the key records, and how do I get them if I change companies?
  • What happens when a master key is lost? How many locks have to be re-coded?
  • Is the keyway actually restricted, and who controls the blanks?
  • Which doors are you leaving off the system, and why?
  • Can the system grow without redoing the existing locks?

Frequently asked questions

Can you convert my existing locks into a master key system?

Often yes. If your cylinders are in decent shape and of a type that can be re-pinned, we can rekey them into a hierarchy, which is usually the more economical route. Worn, mismatched, or unsuitable cylinders get replaced. We confirm on site, since the condition of each lock decides it.

How is a master key system different from keying everything alike?

Keyed-alike means one key opens every lock, with no way to separate access. A master key system gives each door its own key, plus master keys that open defined groups. You get a hierarchy and a record of who can open what.

How many levels should my system have?

Most small businesses and apartment properties need two or three levels: a change key for each door, a master for a group, and sometimes a grand master. Every added level adds complexity and slightly more security tradeoff, so we recommend the fewest levels that fit how you actually operate.

What happens if an employee does not return a master key?

The locks that key opens need to be re-coded, or the affected group needs new cylinders. With a well-documented system, we know exactly which doors are involved, so the work is targeted and not a full rebuild. This is why we recommend tracking every master key from the day it is issued.

Is a restricted keyway worth it for a small business?

It depends on turnover and shared access. If only you and one or two trusted people hold keys, a standard keyway may be enough. If staff change often or contractors need access, a restricted keyway with duplicate-protected keys makes unauthorized copying much harder. It does not make copying impossible, and we will say so plainly.

Can an apartment building use a master key system for tenant doors, laundry rooms, and gates?

Yes, that is one of the most common uses. Each tenant gets a key to one door, and the manager and maintenance staff get keys that reach defined groups. Mailbox hardware and gate locks may or may not be eligible for the system, so we check what is actually installed on site before promising anything.

Will you work around my business hours?

Yes. We schedule installs to avoid shutting your doors during the day, and we can plan after-hours work. Our phone at (213) 577-1366 is answered 24 hours a day, 7 days a week, so you can reach us any time, including if a key goes missing.

Will I get a record of which key opens what?

Yes. We hand over a key schedule that shows the hierarchy and which key belongs where. Keep it somewhere secure, separate from the keys themselves, because it is a map to your whole system.

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Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.

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