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Crenshaw Lock

Master Key System in Montebello · 24/7 mobile

Master Key System in Montebello, California

Crenshaw Lock Company designs and installs master key and restricted key systems in Montebello, California, with full key control. We are a 24/7, fully mobile locksmith and come to your property. Call (323) 997-8867 to talk through your doors, tenants, and who needs access to what.

  • Mobile to your Montebello location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Large ring of master system keys with colored key caps
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A master key system lets one key open many locks while each person carries only the key they need. A property manager might hold a key that opens every suite, a tenant might hold a key for their own suite only, and a maintenance person might hold a key for utility rooms and common doors. Done well, it cuts the ring of keys on every belt and makes it clear who can get in where. Done badly, it creates keys that open doors they should not, or a system that cannot grow.

Montebello has the kind of mixed commercial stock where this matters. Washington Blvd storefronts, office suites, tenant spaces at The Shops at Montebello, event and hospitality buildings, and multi-unit properties all have different needs. A retail strip with several tenants needs something different from a single office with a back warehouse, and an older building with mismatched hardware needs a plan before anyone cuts a key.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead tech David Shar. We are mobile only. There is no storefront to visit, so we come to your building, look at the doors in person, and build the system around how your property actually runs.

How it works in Montebello

  1. 1

    Talk through access needs

    We start by learning who needs to open what. That means tenants, managers, staff, cleaners, contractors, and anyone who needs limited access. Call (323) 997-8867 and we will set up a time at your Montebello property.

  2. 2

    Walk the doors and survey hardware

    We visit the site and look at every door, lock, and cylinder involved. Older hardware, mixed brands, and failed locks are noted, since some may need replacing before they can join a system.

  3. 3

    Design the key hierarchy

    We map out the levels, such as individual keys, group keys, and a top master. We explain the plan in plain language so you can see how access is divided and where room to expand has been left.

  4. 4

    Choose conventional or restricted keyways

    A conventional system is simpler and easier to service. A restricted keyway adds control because keys cannot be freely copied at a hardware store. We help you weigh the tradeoffs for your property.

  5. 5

    Install, pin, and test

    We install or rekey the cylinders on site, and test every key against every lock it should and should not open. Mistakes in a master system are easier to catch before anyone moves in.

  6. 6

    Set up key control going forward

    We hand over a key schedule and talk through how to issue, track, and recover keys. When a tenant leaves or a key goes missing, we can rekey just the affected part of the system.

Need master key system in Montebello?

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 single keys up to a top master.
  • Whether you choose a standard keyway or a restricted keyway with tighter key control.
  • The condition and type of existing hardware, since worn or mismatched locks may need replacement.
  • Whether the work is a new design or an expansion or repair of an existing system.
  • Timing, such as after-hours or urgent requests versus scheduled visits.

Why Montebello chooses us

  • We are fully mobile and work at your property, so we see the real doors rather than guessing from a description.
  • The business has operated since 1987 under owner and lead tech David Shar.
  • We explain the key hierarchy in plain language, so you understand who can open what before work begins.
  • We are available 24/7, which helps when a failed lock or lost master key cannot wait.
  • We test every key against every lock before finishing, instead of assuming the pinning is right.
  • We can work with mixed building stock, from aluminum storefronts to older hardware in established buildings.

Master Key System across Montebello

Montebello's commercial life centers on a few clear corridors. Washington Blvd carries older storefronts and small offices, Montebello Blvd and Beverly Blvd serve neighborhood businesses, and The Shops at Montebello brings tenant suites with their own access needs. With I-5 and I-710 close by, many businesses here also run storage, delivery, or back-of-house areas that need separate access from the front door. In ZIP code 90640, we see how a simple master key plan can keep those areas organized.

Residential and mixed-use properties matter too. Older homes near the original core, many dating from the 1920s to the 1950s, sometimes have been converted into offices or rentals, and their hardware can be a patchwork. Out in Montebello Hills, newer development brings gated entries and amenity doors, where gate hardware and entry locks may need to be coordinated. In North Montebello and the adjacent Montebello Gardens area, small multi-unit buildings often benefit from a key plan that separates unit doors from shared spaces.

Whether you manage a suite near The Shops at Montebello, a business on Washington Blvd, or a building with multiple tenants, we come to you at any hour. Call (323) 997-8867 and we will start by looking at your doors.

Locked out or need a locksmith now?

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

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Other Montebello locksmith services

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

Master Key System in Montebello — FAQs

What is a master key system?
It is a set of locks designed so that each lock has its own key, while higher-level keys can open groups of locks or all of them. It lets managers and tenants share a building with clear access boundaries.
Can you add to a master key system I already have in Montebello?
Often yes, depending on the existing hardware and how it was originally set up. We would look at the locks on site first. Call (323) 997-8867 to arrange a visit.
What is a restricted keyway?
It is a key profile that is controlled so duplicates cannot be freely cut at ordinary key shops. It gives you better key control, though it usually means the system is a bit more involved to manage.
Is a master key system a good fit for a tenant suite at a shopping center?
It can be, especially when a landlord and tenant each need clear access. The right design depends on lease terms and which doors are shared, so we plan it around your layout.
What happens if a master key is lost?
We assess which locks are affected and typically rekey them so the lost key no longer works. A good system limits how much has to be redone. You can reach us 24/7 at (323) 997-8867.
Do my existing locks work in a master key system?
Some can be converted by changing the internal pinning, while worn, damaged, or incompatible locks may need replacing. We check each one during the walkthrough.
Can a master key system include gates or side doors?
Where the hardware allows, yes. Gates, rear doors, and utility rooms are often included so one plan covers every point of entry. We confirm compatibility during the site visit.
Do I need to come to a shop?
No. We are mobile only and have no storefront. We come to your Montebello property, day or night, and do the design and installation on site.
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