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Crenshaw Lock

Master Key System in West Covina · 24/7 mobile

Master Key System Installation in West Covina, CA

Crenshaw Lock Company designs and installs master key systems and restricted-key setups with key control for West Covina properties. We are a fully mobile locksmith available 24/7, and we come to your site. To plan a system for your building, call (323) 997-8867.

  • Mobile to your West Covina location
  • Available 24/7
  • Price quoted before we start
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A master key system lets the right people open the right doors with as few keys as possible. A property manager may carry one key that opens every unit door, a tenant opens only their own, and a maintenance worker opens the utility rooms but not the offices. Done well, it cuts down on key rings, lost-key panic and guesswork about who can get in where. Done badly, it creates weak points that are hard to fix later.

West Covina has plenty of properties where this matters. The city has garden and mid-rise apartment complexes, two large retail centers in Plaza West Covina and Eastland, and a medical district around Emanate Health Queen of the Valley Hospital. Each has a different access problem: unit turnover, staff shifts, back-of-house rooms, storage areas and shared amenities.

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, with no storefront to visit. We work out the design with you on site, install the hardware at your doors and hand over a clear key plan so the system stays manageable years from now.

How it works in West Covina

  1. 1

    Walk the property and list every door

    We come to your location and go through the doors that need to be keyed: unit entries, offices, mechanical rooms, gates, storage and shared spaces. We note the existing hardware, its condition and which doors should stay separate from the rest.

  2. 2

    Decide who needs access to what

    We sit down with you to map out access levels. Typically that means individual keys for single doors, group keys for areas such as a floor or a building, and a top-level master. We talk through how many people will hold each level, since that shapes the design.

  3. 3

    Design the key hierarchy and choose the keyway

    We lay out the hierarchy on paper before cutting anything. You can choose a standard keyway or a restricted one, where duplication is limited to authorized people. We explain the tradeoffs of each, including how more levels in a master system affect security.

  4. 4

    Install or rekey the cylinders

    We fit new cylinders or rekey suitable existing hardware to match the plan, door by door. Where a lock is worn or too basic for the job, we tell you and suggest an upgrade rather than building a system on weak hardware.

  5. 5

    Test every key against every door

    Before we leave, we test each key level against the doors it should open and, just as important, the doors it should not. Fixing a mistake on the spot beats finding it on a busy morning.

  6. 6

    Hand over the key records and control plan

    You get a record of the hierarchy and guidance on issuing, tracking and returning keys. We also explain how to add doors or change levels later without starting over.

Need master key system in West Covina?

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

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What affects the price

  • The number of doors and cylinders included, which drives both the parts and the labor involved.
  • How many levels the hierarchy has, since a system with more groups and sub-masters takes more design and more precise key cutting.
  • Whether you choose a standard keyway or a restricted, patent-protected keyway with duplication control.
  • The condition and grade of your existing hardware, and whether it can be rekeyed or needs replacing.
  • How many keys you need cut for each level, and whether the keys will be stamped or tracked for control.
  • Whether the work happens in one visit or is phased across a large complex or several buildings.

Why West Covina chooses us

  • Fully mobile service: we come to your complex, shop or office, so you can see the doors we are designing around.
  • In business since 1987, which means long experience with the mix of older and newer hardware found in post-war and newer buildings.
  • We design the hierarchy on paper first and explain security tradeoffs plainly, including when a simpler system is the better choice.
  • We test every key against every door before leaving, so problems are caught on site.
  • You deal with the owner-led team, with David Shar as lead tech, rather than a call center.
  • We will tell you when existing locks are too worn to build a system on and recommend practical fixes.

Master Key System across West Covina

West Covina's commercial and residential mix gives master key systems plenty of uses. Around Plaza West Covina and the Eastland Center in the 91790 and 91791 areas, retail and service businesses often need keying that separates the sales floor, stockrooms and offices, and lets managers hold access without every employee carrying a full set. The medical district near Emanate Health Queen of the Valley Hospital raises similar needs for supply rooms, records areas and staff-only spaces.

Apartment complexes along Azusa Ave, Amar Rd and Vincent Ave are another common case. Property managers want one key that serves the whole complex while each tenant's key opens only their own unit. A well-planned system also makes turnover easier, because rekeying a unit does not disturb the rest of the building. Residents in the 91792 and 91793 areas often live in these garden-style and mid-rise buildings.

Some South Hills and Woodside Village owners with larger properties, gated entries or outbuildings also ask about restricted keys, so copies cannot be made at any hardware counter. Whether you are near the I-10, the SR-60, Glendora Ave or Sunset Ave, we come to you at any hour. Call (323) 997-8867 to talk through your site.

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Other West Covina locksmith services

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

Master Key System in West Covina — FAQs

What is a master key system?
It is a set of locks designed so that each door has its own key, while higher-level keys open groups of doors or all of them. It lets a manager hold fewer keys while tenants or staff only open what they should.
Can my existing locks be turned into a master key system?
Often yes, if the cylinders are in good condition and compatible. We inspect them on site and tell you honestly which can be rekeyed and which should be replaced. Call (323) 997-8867 to arrange a visit.
What is a restricted keyway?
A restricted keyway uses a key blank that is not freely sold, so copies require authorization. It adds key control, which is useful for apartment complexes, offices and medical settings where lost or copied keys are a worry.
Is a master key system less secure than separate locks?
In theory, a master system adds some added possible key combinations, which is why design matters. Using quality cylinders, a sensible number of levels and restricted keys keeps the risk low. We explain the tradeoffs for your property.
Can you set this up for an apartment complex in West Covina?
Yes. A common setup has a unit key per tenant, a building or common-area key and a manager master. It also simplifies turnover rekeys. You can reach us 24/7 at (323) 997-8867.
Do you offer this for retail stores and offices?
Yes. Retailers and offices often separate the sales area, stockroom, back office and utility spaces, with managers holding higher access levels than staff.
Can I add doors to the system later?
Usually, yes, if the system was planned with room to grow. We document the hierarchy so additions or changes are manageable without rekeying everything.
Do I need to come to a shop?
No. We are fully mobile with no storefront, and we do the design and installation at your property. We are available 24/7, so call (323) 997-8867 to get started.
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