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Crenshaw Lock

Master Key System in Arcadia · 24/7 mobile

Master Key System Design and Installation in Arcadia, CA

Crenshaw Lock Company designs and installs master-key and restricted-key systems with key control in Arcadia, California. We are a fully mobile locksmith available 24/7, and we come to your property. Call (323) 997-8867 to talk through your doors, your users and how you want keys managed.

  • Mobile to your Arcadia location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
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A master key system lets one key open many locks while each person still carries only the keys they need. In Arcadia that can mean a new custom estate where the owner wants a single key for the whole house, a condo or apartment building where each unit has its own key and management holds a master, or a tenant space near a shopping center where staff, managers and cleaners need different levels of access.

Arcadia has a lot of building change going on. Older 1950s and 1960s ranch homes in Upper Rancho, Lower Rancho and Highland Oaks are regularly torn down and replaced with large new custom homes. Those projects need a full lockset package keyed correctly from day one, and a master-key plan is often the cleanest way to do it. Multi-unit buildings near Santa Anita and Huntington Drive, plus commercial space around Westfield Santa Anita, have their own access needs.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar. We are mobile only, so there is no storefront to visit. We come out, look at the doors, and design a system that fits how the property is really used, then install it and explain how to keep control of the keys afterward.

How it works in Arcadia

  1. 1

    Walk-through and access mapping

    We visit the property and list every door and lock that needs to be included: front and rear entries, interior rooms, garages, equipment rooms, unit doors, and common areas. We also talk about who needs access to what.

  2. 2

    Designing the key hierarchy

    We lay out the levels of access, such as individual change keys, group masters and a grand master. The design is written down so it can grow later without compromising security.

  3. 3

    Choosing hardware and key control

    We help you decide between standard master-keyed cylinders and restricted keyways, where copies can only be made with proper authorization. The right choice depends on how tightly you want to control duplication.

  4. 4

    Installation and rekeying

    We install new cylinders or rekey existing hardware to the plan, test every lock with its intended keys, and confirm that keys that should not work on a door do not.

  5. 5

    Key issuing and records

    We hand over keys, mark them with a coding system, and provide the key schedule so you know who holds what. Good records are what keep a master system secure over years.

  6. 6

    Future changes and expansion

    When you add a door, replace a tenant or lose a key, we can extend or adjust the system so it stays consistent, rather than starting over.

Need master key system in Arcadia?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • The number of doors and cylinders included in the system
  • How many levels of access the hierarchy needs, from simple change keys to a multi-tier grand master
  • Whether you choose standard keyways or a restricted keyway with controlled duplication
  • Whether existing hardware can be rekeyed or new locksets and cylinders must be supplied
  • New construction timing versus retrofitting an occupied home, building or business
  • The grade and finish of the hardware, especially for custom homes with specific design requirements

Why Arcadia chooses us

  • Fully mobile service, so we assess your actual doors on site rather than guessing from a description
  • Operating since 1987 with owner David Shar directly involved in the work
  • Systems designed around how your property is used, not a one-size-fits-all pattern
  • Clear key schedules and records so you can manage access long after installation
  • Experience across residential, multi-unit and commercial settings, which matters in a city that mixes all three
  • Available 24/7, so urgent changes such as a lost master key can be addressed without waiting for business hours

Master Key System across Arcadia

Arcadia's building stock makes master key systems especially relevant. In Upper Rancho, Lower Rancho and Highland Oaks, teardown-and-rebuild projects are common, and a new custom home often comes with many exterior and interior doors, guest quarters and sometimes separate garages or pool houses. Keying everything under one plan from the start avoids a drawer full of mismatched keys. Around Baldwin Stocker and Peacock Village, homeowners remodeling or upgrading can have existing locks rekeyed into a coherent system.

Multi-unit properties near Santa Anita and along Huntington Drive have different needs: each tenant gets a unique key, while the manager or owner holds a master for emergencies and maintenance. When a tenant moves out, a rekey keeps the system accurate. If you manage a property in ZIP code 91006 or 91007, we can set the system up so changing one unit does not disturb the rest.

Commercial spaces in strip centers and near Westfield Santa Anita, along Baldwin Ave and Santa Anita Ave, benefit from tiered access for owners, managers and staff. We also serve properties in 91066 and 91077, and the surrounding area reached via I-210 and SR-19. Whether the property is a home, an office or a retail suite, we come to you.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

Other Arcadia locksmith services

See all of our Arcadia services, or our citywide master key system page.

Master Key System in Arcadia — FAQs

What is a master key system?
It is a lock and key arrangement where each lock has its own key, but a higher-level master key opens a defined group of locks. A grand master can open everything in the system.
Can you set up a master key system for a new custom home in Arcadia?
Yes. For new construction in areas like Upper Rancho or Highland Oaks, we can supply and key a full lockset package under one plan. Call (323) 997-8867 to discuss your door count and access needs.
Is a master key system less secure than separate keys?
A well-designed system can be very secure, but more access levels do add some complexity. We balance convenience with security and recommend restricted keyways where you want tighter control over copies.
What is a restricted keyway?
It is a key profile that is patented or controlled so that copies can only be made with proper authorization. It helps prevent employees, tenants or former occupants from duplicating keys at a hardware store.
Can my existing locks be added to a master key system?
Often yes, if the cylinders can be rekeyed or replaced to match the plan. We check the hardware on site and tell you which locks can be kept.
What if a master key is lost?
Contact us right away at (323) 997-8867. Depending on the system, we may be able to rekey the affected locks or reconfigure the hierarchy so the lost key no longer works.
Do you offer master key systems for apartments and condos near Santa Anita?
Yes. We can set up a system where each unit has an individual key and management holds a master, and we can rekey units at tenant turnover to keep it accurate.
Do I need to visit your shop?
No. We are a fully mobile locksmith with no storefront, and we are available 24/7. We come to your Arcadia property to assess, install and test the system.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7