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Wilshire Lock & Key

24/7 locksmith · Tarzana, CA

Master Key System in Tarzana, CA

Wilshire Lock & Key designs and installs master key systems in Tarzana, from restricted keyways for medical offices to key hierarchies for condo buildings and gated properties. We answer 24 hours a day, seven days a week, at (213) 577-1366. Call, and David will help you map who needs access to what.

  • 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 is a master key system, and who needs one in Tarzana?

A master key system lets different keys open different sets of locks inside the same property. Every door still has its own key that opens that door and nothing else. On top of that, one or more higher-level keys open whole groups of doors, or all of them. The cylinders are built so that more than one cut of key will lift the pins correctly. That is why a master key system cannot be faked by simply cutting a key differently at the counter. It has to be designed, pinned and tested as a system.

The signs that you need one are easy to spot. You carry a ring of eight keys and still guess which one is which. You cannot say with confidence who has a key to the back office, the supply room or the roof. A manager needs to reach every unit but should not hand out a key that opens everything. An employee left last spring and you are not sure what they still have in a drawer at home.

Who tends to need it: medical suites with exam rooms and supply closets, multi-tenant commercial buildings, apartment and condo buildings, offices with several staff, and larger private properties with a main house, guest house, pool house and gates. If all you have is a front door and a back door, a master key system is probably more than you need. In that case lock rekey service is usually the more economical route, and we will tell you so.

How is a key hierarchy laid out?

A hierarchy is a map of who opens what, drawn on paper before any lock is touched. Most of the real work in a master key system happens here, not at the door. Get the map right and the hardware follows. Get it wrong and you end up with a key that opens too much or a key that is missing where someone needs it.

The usual levels look like this:

  • Change key: opens one lock only, such as a single office, a single apartment or a single exam room.
  • Master key: opens a defined group, such as every exam room on one floor or every unit in one building.
  • Grand master key: opens several master groups, and is usually held by a property manager or practice administrator.
  • Top-level or great-grand master key: owner level, only for larger systems, and issued to very few people.
  • Common-area keys: a separate group for shared doors like mail rooms, laundry rooms, trash enclosures and equipment rooms, so those can be handed out without exposing anything else.

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How we install a master key system, step by step

We do the same disciplined sequence on every job, whether it is eight doors or eighty. The details change with the property. The order does not.

  1. Walk the property and list every door, gate, cabinet and padlock that might belong in the system. We note the hardware type, its condition, and whether the cylinders can be re-pinned or need to be swapped.
  2. Talk through the people. Who needs access to what, on which shifts, and how do contractors, cleaners and vendors fit in? We also ask what happens when somebody leaves, because that question shapes the whole design.
  3. Draw the hierarchy and agree on it with you before anything is cut. You get a written key schedule that shows each door, its key code and which keys open it.
  4. Choose the cylinder platform and keyway. Sometimes that means re-pinning what you already own. Sometimes it means installing new cylinders with a restricted keyway.
  5. Pin or replace the cylinders, working door group by door group so your property is never left open longer than it has to be. Then test every key on every lock, including the locks it should not open.
  6. Cut and mark the keys. We tag them with codes rather than door names, so a lost key does not tell a finder which building it opens.
  7. Hand over the key schedule and set up a simple key control routine: who is allowed to request copies, how keys are signed out, and how replacements are ordered.

What do restricted keyways and duplicate-protected keys actually do?

A restricted keyway is a key profile whose blanks are controlled by the manufacturer and released only through authorized channels. Duplicate-protected keys add a layer of paperwork on top: copies are made only on a request from the registered account holder. In practical terms, the key cannot be copied at a hardware-store kiosk, and that is the main point of a restricted key system. You decide who can authorize copies, and copies are then made through a controlled process such as our key duplication service.

It helps to be clear about the limits. A restricted keyway makes casual and quiet copying much harder. It does not make a door impossible to defeat, and it does nothing about a weak door, a loose strike plate or a frame that flexes. Which restricted options exist depends on the hardware line, so we confirm what is available for the doors you have rather than promise a specific product over the phone.

If your doors need a stronger cylinder in addition to key control, that is a separate conversation, and our high-security locks page covers it.

  • Good fit: offices, clinics, rental properties and any place where keys change hands often.
  • Less necessary: a single-occupant space with two or three keys that never leave your pocket.
  • Worth doing together: a restricted keyway plus a written authorization list, so the protection does not depend on one person's memory.

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

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How does a master key system help with employee key control and apartment buildings?

For an employee key control system, the benefit is accountability. Each key carries a code tied to a person on your schedule. A restricted blank means it is not casually duplicated. When someone leaves, you collect their key and look at what it opened. In a well-designed system, a lost or unreturned change key means rekeying one group of doors, not replacing every lock in the building.

An apartment master key system works the same way at a different scale. Each tenant gets a key to their unit only. Maintenance gets a key for a defined set of units and utility rooms. The manager holds the master. When a tenant moves out, a single unit can be changed over without touching the rest of the building, and without recutting the keys everyone else already carries. If you run rentals, our page on locksmith services for landlords covers the turnover side of that.

There is one honest caveat. If you have constant staff turnover or dozens of people coming and going, a mechanical system gets hard to manage, because every key is a physical object you have to chase. In that case a mixed approach, with mechanical keys for most doors and electronic credentials for the busiest ones, can be the better design. That is where access control installation comes in.

What affects the cost of a master key system in Tarzana?

We do not quote a flat number over the phone for this work, because two buildings with the same number of doors can be completely different jobs. Here is what moves the cost, so you can see why a walkthrough comes first:

  • Number of cylinders: every door, gate, cabinet and padlock in the system adds work.
  • Re-pin or replace: if your existing cylinders are sound and compatible, re-pinning them into a system is usually the lighter-cost option. If they are worn, mismatched or unsupported, replacement is the safer call.
  • Keyway and security level: a restricted, duplicate-protected platform costs more than a standard keyway, but it gives you real key control.
  • Depth of the hierarchy: more levels and more groups mean more planning and more pin combinations to manage.
  • Number of keys: each key has to be cut, tested and tagged, and larger key counts add up.
  • Condition of the doors: a cylinder will not work well in a worn latch or a sagging door. If hardware needs attention, we point that out and may suggest commercial door hardware work first.
  • Scheduling: work done around business hours or in stages across a building takes more coordination than a single clean visit.

Locked out or need a locksmith now?

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

Call (213) 577-1366

Where do master key systems fit in Tarzana?

Tarzana is a mix of property types, and each one uses a master key system differently. Along the Ventura Boulevard corridor, including the Tarzana Safari Walk business district, you find storefronts and multi-tenant buildings with back-of-house doors, shared mechanical rooms and tenant suites. Condo and apartment buildings cluster along that same corridor and the 101, and those are classic cases for a unit, maintenance and manager hierarchy. A shopfront with shared utility access also benefits from a restricted key that a former tenant cannot simply copy.

Around Providence Cedars-Sinai Tarzana Medical Center, the Tarzana medical district has office suites where staff roles differ. Front-desk staff, clinical staff, an office manager and a cleaning crew all need different access to exam rooms, records rooms and supply closets. A hierarchy with restricted keys is a natural fit, and medical office lock and rekey work like this is one of the scenarios we plan for in this part of town.

On the North Tarzana flats, along the Victory and Vanowen corridors, the same logic applies to any small shop or office that has outgrown a drawer full of unmarked keys. Nothing about the design depends on the building being large.

Then there are the estates. Guard-gated Mulholland Park, Braemar Estates and the semi-rural equestrian lots of Melody Acres often have a main house, outbuildings, driveway gates and paddock gates, all on one property. A single-owner system lets the family carry one key while staff or caretakers get a limited key that reaches only what they need. Because hillside and equestrian properties see strong sun and canyon wind, exterior hardware there weathers faster than a protected entry, so we check gate and exterior locks before pinning them into a system. If a gate lock is already struggling, our gate lock repair page explains what we do first. We work on the locks and gates on your own property, not on a community's shared entry system unless that association has hired us for it.

We serve all of 91356 from our Westwood storefront at 10740 Wilshire Blvd and our mobile vans. Tarzana is about 14 miles from that base, and the property survey is done on site, door by door.

What mistakes should you avoid with a master key system?

A master key system is a trade-off. It gives you convenience and control, and in exchange it introduces a few things you need to manage honestly.

  • Do not add more levels than you need. Each extra level adds pin combinations and a little more theoretical exposure. Start with the simplest hierarchy that matches how your people actually work.
  • Guard the top-level key. If a grand master is lost, you may need to rekey a large share of the system. Issue it to very few people and record who holds it.
  • Do not ask for a master key to be improvised from your current keys. A real system has to be designed from the start and tested across every lock.
  • Do not mix random old cylinders into a new system. One mismatched lock is a gap in your key control.
  • Keep the key schedule somewhere safe. It is effectively a map of your building, and it is also how you add doors or order replacement keys later.
  • Plan for growth. If you may add suites, units or outbuildings, tell us now so the system leaves room for them.

Locked out or need a locksmith now?

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

Call (213) 577-1366

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

We have been in business since 1987, and master key work is the kind of job where that history matters, because a system you install today has to still make sense years from now. We run a real storefront at 10740 Wilshire Blvd in Westwood plus mobile service vans, and we are one company, with no dispatch middlemen between your call and the person who shows up. David, the owner and lead technician, oversees how systems are designed, so the hierarchy on your key schedule is reviewed by someone who has to live with it.

California requires locksmith companies to hold a BSIS LCO license, and you should ask any locksmith for it before they start work, on a job like this above all. Ask us too, and check it yourself.

Our phone is answered 24 hours a day, seven days a week, year-round at (213) 577-1366. Most master key projects are planned, not urgent, but if your keys have gone missing and you need a fast answer about which doors are exposed, call any time. For the wider range of work we do for businesses, see our commercial locksmith page.

Frequently asked questions

Can my existing locks be turned into a master key system?

Often yes, but it depends on the cylinders. If they are in good condition and made in a way that allows re-pinning, we can usually build a system around them. If they are worn, mismatched or from a line that cannot be mastered, we replace those cylinders. We confirm that on the walkthrough, not over the phone.

How long does it take to install a master key system?

It depends on the number of doors and how much hardware needs attention. A small suite can often be finished in one visit. Larger buildings are staged door group by door group so you are not left without working locks. Design and the key schedule come first, and that planning is part of the job.

What happens if a master key is lost?

It depends on the level of the key. A lost change key usually means rekeying one lock. A lost master affects that whole group, and a lost grand master can mean rekeying much more. That is why top-level keys are issued sparingly and recorded, and why we mark keys with codes instead of door names.

Is a restricted keyway worth it for a small office?

If keys change hands, if you have employees, or if you share a building with other tenants, usually yes. It keeps copies from being made without your authorization. If you are the only person with a key, a standard keyway is often enough and the more economical choice.

Can a hardware store copy a duplicate-protected key?

Not through normal channels. Restricted blanks are released only through authorized sources, and duplicate-protected keys require a request from the registered account holder. No system is perfect, but it stops casual copying, which is where most key control problems begin.

Can we add doors to the system later?

Usually, if the system was planned with room for growth and you still have the key schedule. Tell us if you may add suites, units or outbuildings, and we will design the hierarchy with that in mind. Adding to a system without a record is much harder.

Do you set up apartment master key systems for Tarzana condo and apartment buildings?

Yes. A typical layout gives each resident a key to their own unit, maintenance a defined group, and the manager a master. Buildings with a board or association will need that body to approve who holds which key level, and we can help you write that up.

Can a master key system work alongside electronic locks or keypads?

Yes. Many properties keep mechanical keys for most doors and use electronic credentials where there is heavy traffic or frequent staff changes. We design the mechanical hierarchy so it fits around the electronic doors, not against them.

How much does a master key system cost?

It depends on the number of cylinders, whether existing hardware can be re-pinned or must be replaced, the keyway you choose, the number of hierarchy levels and the number of keys. We scope it after a walkthrough, so the figure reflects your actual doors. Call (213) 577-1366 to arrange one.

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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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