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Crenshaw Lock

Master Key System in Rowland Heights · 24/7 mobile

Master Key System in Rowland Heights, California

Crenshaw Lock Company designs and installs master-key and restricted-key systems with key control for businesses and multi-tenant properties in Rowland Heights, California. We are fully mobile and available 24/7, so we come to your site. Call (323) 997-8867 to plan a system around your doors.

  • Mobile to your Rowland Heights 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 doors while each tenant, department, or employee keeps a key that opens only their own. It sounds simple, but a poorly planned system leaves gaps: keys that open more than they should, no record of who holds what, and no way to cut off a former tenant without rekeying everything. In Rowland Heights, where many businesses share large multi-tenant plazas, those gaps cause real headaches.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar brings that experience to every key system we design. We are a mobile-only service. There is no storefront to visit. We come to your property, look at the doors and hardware you actually have, and build a plan that fits.

This page is for property managers, restaurant owners, office tenants, and small-business operators in the Colima Rd and Nogales St area and beyond. If you are rekeying suites between tenants, tired of duplicated keys floating around, or setting up a new building from scratch, a properly designed master key system with key control can make day-to-day access far easier to manage.

How it works in Rowland Heights

  1. 1

    Walk the property and list every door

    We come to your location and inventory the doors that need to be keyed: suite entries, back-of-house doors, storage rooms, utility closets, and gates. We note the hardware on each, such as aluminum-storefront deadbolts, mortise cylinders, or panic and exit devices, because that affects what the system can do.

  2. 2

    Map out who needs access to what

    We sit down with you and decide the hierarchy. That might be a single master for the property manager, sub-masters for each floor or department, and individual keys for each tenant. We talk through who should never have access to certain areas so the design reflects real needs.

  3. 3

    Choose restricted or standard keyways

    For stronger key control, we can discuss restricted keyways, where key blanks are not freely available for copying. This helps when you want to prevent unauthorized duplicates, which is common in plazas with high staff turnover such as restaurants and retail shops.

  4. 4

    Install and rekey the cylinders

    We pin or install the cylinders to match the plan, test each key against every lock it should and should not open, and confirm that doors latch and operate smoothly. Where hardware is worn or jammed, we tell you what is worth repairing before building a system on top of it.

  5. 5

    Document the system and hand over the keys

    You receive a clear key schedule showing which keys open which doors. We go over how to track issued keys, how to request additional copies, and how to handle a lost key so you can respond quickly instead of guessing.

  6. 6

    Plan for changes down the road

    Tenants move, staff changes, and buildings expand. We explain how the system can be extended or rekeyed later without starting over, and we are reachable 24/7 at (323) 997-8867 if something comes up outside business hours.

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What affects the price

  • The number of doors and cylinders that need to be included in the system, since each one must be keyed or replaced.
  • The complexity of the hierarchy, such as a single master versus multiple sub-masters across floors, suites, or departments.
  • Whether you want standard keyways or a restricted keyway with tighter key control and duplication limits.
  • The condition and type of existing hardware, including aluminum-storefront deadbolts, mortise locks, and panic devices that may need repair or replacement.
  • Whether the work is done in one planned visit or spread across phases, such as between tenant turnovers.
  • The time of day the work is needed, including after-hours or emergency visits.

Why Rowland Heights chooses us

  • Fully mobile service: we come to your plaza, office, or restaurant, and there is no storefront to drop by.
  • Available 24/7, which matters for restaurants and shops that can only be worked on after closing.
  • Serving Greater Los Angeles and Ventura County since 1987, with owner David Shar leading the work.
  • Design starts with how your people actually use the doors, not a one-size-fits-all template.
  • Clear written key schedules so you know exactly which key opens what.
  • We tell you honestly when worn hardware should be fixed first rather than building a system on a failing lock.

Master Key System across Rowland Heights

Rowland Heights has a commercial character unlike most suburbs. In the Little Taipei corridor along Colima Rd and Nogales St, large plazas such as Diamond Plaza, Hong Kong Plaza, and Pearl Plaza hold dozens of restaurants, markets, and offices under one roof or one parking lot. For a property manager in ZIP code 91748, that means many tenants, frequent turnover, and a lot of keys in circulation. A master key system with key control lets you keep management access while giving each tenant a key that opens only their suite.

The hardware in these plazas often includes aluminum-storefront deadbolts, roll-gate padlocks, and restaurant panic and exit devices. These take real wear, and a jammed deadbolt or tired panic bar is better dealt with before it is tied into a larger system. We can look at those doors during the same visit and rekey several suites between tenants in a single trip.

Outside the plazas, the Fairway Dr area and the Powder Canyon hillside tracts are mostly residential, with 1970s and 80s two-story homes. Small offices, home-based businesses, and homeowners with detached structures or multiple entries sometimes want a keyed-alike or master arrangement too, and we can scope that. Whether you are near SR-60, off Fullerton Rd, or up toward Schabarum Regional Park, we come to you.

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Other Rowland Heights locksmith services

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

Master Key System in Rowland Heights — FAQs

What is a master key system?
It is a keying arrangement where each lock has its own key, and a higher-level master key opens a defined group of locks. Sub-masters can open a smaller group, such as one floor. Call (323) 997-8867 to talk through what would suit your property.
Can you rekey several tenant suites in one visit?
Yes. Because we are mobile, we can work through multiple suites at a plaza in a single visit. This is common between tenants in multi-tenant retail centers like those along Colima Rd and Nogales St.
What is a restricted key system?
A restricted keyway uses key blanks that are not freely sold, so keys cannot be copied at just any hardware store. It adds key control and is useful for businesses with staff turnover.
Do you work after hours for restaurants?
Yes. We are available 24/7, which suits restaurants and shops that cannot be disrupted during open hours. Call (323) 997-8867 to schedule or to ask about an urgent need.
Can you build a system around my existing locks?
Often, yes. We inspect what you have first. Aluminum-storefront deadbolts and panic devices that are worn or jammed may need repair or replacement before they can be part of a reliable system.
Do you have a shop I can visit?
No. Crenshaw Lock Company is mobile only. We come to your location anywhere in Rowland Heights, including the 91748 area.
What happens if a master key is lost?
The response depends on how the system is built and which key was lost. We can advise on rekeying the affected locks and, with a well-documented system, usually limit the work to what is necessary.
How do I get started?
Call us at (323) 997-8867. We will ask about your doors, tenants, and goals, and arrange a mobile visit to look at the property and plan 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