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Crenshaw Lock

Master Key System in Mission Hills · 24/7 mobile

Master Key System in Mission Hills, California

Crenshaw Lock Company designs and installs master key and restricted key systems with key control in Mission Hills, California. We are a fully mobile locksmith available 24/7, and we come to your office or property. Call (323) 997-8867 to plan a system that fits your doors and your staff.

  • Mobile to your Mission Hills location
  • Available 24/7
  • Price quoted before we start
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A master key system lets different people open different doors with the right key for their role, while one key you control can open them all. In Mission Hills that usually means a small medical or professional office, a property manager with several units, or a business along Sepulveda Boulevard that has outgrown a drawer full of unmarked keys and the question of who holds copies.

The need often comes after a change: a staff member leaves, a tenant moves out, or an office is bought and nobody knows who has keys. A master key system fixes that by giving you a plan. Each door gets a defined level of access, and every key is tied to a person or role. Restricted keyways add another layer, because copies can only be made with your authorization rather than at any hardware counter.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead tech David Shar's team works on site. We are mobile only, with no storefront to visit, so the work starts with a conversation about your building and ends with the system installed and tested at your doors.

How it works in Mission Hills

  1. 1

    Talk through who needs access to what

    We start by learning how your space is used: which rooms are shared, which are private, and which roles need access. For an office near Providence Holy Cross Medical Center, that might mean front-desk areas, exam or consultation rooms, supply closets, and records storage.

  2. 2

    Walk the doors and assess existing hardware

    We come to your location and look at each door, cylinder, and lock type. Older buildings may have mixed brands or worn hardware that cannot be included in a system, and we tell you plainly which locks can be reused and which should be replaced.

  3. 3

    Design the keying structure

    We lay out a hierarchy of change keys for individual doors, group keys for areas, and a master key above them. We also discuss whether a restricted keyway makes sense so that duplication stays under your control.

  4. 4

    Install and pin the cylinders

    We rekey or replace cylinders so each lock responds only to the intended keys. Every door is tested with every key level to confirm that each key opens what it should and nothing it shouldn't.

  5. 5

    Set up key control and records

    We stamp or label keys appropriately, and give you a key record showing who holds what. We recommend how to handle issuing keys, returning them, and re-keying when someone leaves.

  6. 6

    Plan for growth

    Systems should have room to add doors, tenants, or staff later. We build in that flexibility so expansion means adding cylinders rather than starting over.

Need master key system in Mission Hills?

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 that need to be included in the system.
  • How many levels of access the hierarchy needs, such as individual, group, and master tiers.
  • Whether existing hardware can be rekeyed or some locks must be replaced with commercial-grade cylinders.
  • Whether you choose a restricted keyway with controlled duplication rather than a standard keyway.
  • The number of keys to be cut and how many people need them.
  • Whether the work happens during normal hours or you need after-hours or urgent service.

Why Mission Hills chooses us

  • We are fully mobile and do the design, assessment, and installation at your site, so there is no shop to visit.
  • We have worked in Greater Los Angeles since 1987, which includes mixed older and newer commercial buildings.
  • We tell you honestly when old hardware should be replaced instead of forced into a system it cannot support.
  • We focus on key control as much as the lock hardware, since a system only works if you know who holds which key.
  • We are available 24/7, which helps when a staff departure or break-in concern cannot wait.
  • We design systems with room to grow so you do not need to rebuild when your business changes.

Master Key System across Mission Hills

Mission Hills has a distinctive mix of settings. Around the Historic Mission district, near Mission San Fernando Rey de Espana and the Andres Pico Adobe, you find older properties where hardware changes should be careful and sympathetic. Along the Sepulveda Boulevard corridor, small businesses and professional offices have steady needs for rekeying and access control, and the medical-office cluster near Providence Holy Cross Medical Center often needs systems that handle several staff roles and private areas.

A typical job in ZIP code 91345 might be a professional office that has had staff changes and wants a commercial rekey with a simple master key setup, so current employees have exactly the access they need and old keys stop working. Owners of multi-unit or mixed-use property near San Fernando Mission Boulevard and Brand Boulevard sometimes want the same thing: unit keys for tenants and one master for the manager.

Residential neighbors in the older Dennis Park tract and the streets around the Mission also ask about keying several exterior doors alike or restricting copies on a rental. Whether you reach us from CA-118 or a quiet side street, call (323) 997-8867 and we will come to you.

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Other Mission Hills locksmith services

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

Master Key System in Mission Hills — FAQs

What is a master key system?
It is a keying plan in which each lock has its own key, and a higher-level master key can open a defined group of locks or all of them. It gives you flexible access without carrying a ring of keys.
Can you set up a master key system for a small office in Mission Hills?
Yes. Small medical and professional offices are a common fit. We assess your doors, design the access levels, and install the system on site. Call (323) 997-8867 to discuss it.
What is a restricted keyway?
A restricted keyway uses a key blank that is not freely sold, so copies must be authorized by you. It adds protection against unauthorized duplication, and it works well with a master key system.
Can my existing locks be included?
Often they can be rekeyed if they are in good condition and compatible. Worn or mismatched hardware may need replacing. We tell you which is which after looking at your doors.
We had staff changes. Do we need a full system or just a rekey?
It depends on how many doors and roles are involved. A simple rekey may be enough for a small space, while a master key setup helps when different staff need different access. We can recommend one or the other.
Do you offer service outside normal business hours?
Yes, we are 24/7 and fully mobile. If you need urgent help after a lost key or a security concern, call (323) 997-8867.
Can I add doors or keys to the system later?
Usually yes, if the system was designed with expansion in mind. We plan for growth at the start so additional doors or staff can be added without redoing everything.
How do I keep track of who has keys?
We provide guidance and a key record listing who holds which key. Good practice includes signing keys out, collecting them when someone leaves, and rekeying when a key is lost.
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