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Crenshaw Lock

Master Key System in Tarzana · 24/7 mobile

Master Key System Design and Installation in Tarzana, CA

Crenshaw Lock Company designs and installs master-key and restricted-key systems with real key control for Tarzana businesses, medical suites, and multi-unit properties. We are fully mobile and available 24/7, and we come to you. Call (323) 997-8867 to plan a system around your doors and your people.

  • Mobile to your Tarzana 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 different people open different doors with different keys, while one authorized key can open them all. That sounds simple until you try to run it in a real building. In Tarzana, where a suite on Ventura Blvd may hold a medical practice, a billing office, a supply closet, and a shared corridor door, the way keys are organized matters as much as the hardware itself.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead tech David Shar's work covers the whole job: planning the key hierarchy, selecting compatible cylinders, pinning or rekeying them, and setting up key control so duplicates cannot quietly multiply. We also handle restricted keyways, where keys can only be cut by an authorized source, which helps when staff turnover is a regular fact of life.

We are mobile only. There is no storefront to visit. We bring tools, cylinders, and key-cutting capability to your property, walk the doors with you, and build the system on site. That suits Tarzana well, from busy professional buildings along the Boulevard to managed residential properties on the flats and larger estates in the hills.

How it works in Tarzana

  1. 1

    Walk the property and list every door

    We start by walking the site with you and recording each door, lock type, and who needs access: entry doors, suites, storage, utility rooms, gates. In a Ventura Blvd medical building this often exposes mixed hardware from several tenant improvements over the years.

  2. 2

    Design the key hierarchy

    Together we decide who gets what: individual change keys, group keys for departments or floors, and a top-level master. We also discuss whether any areas, such as records or medication storage, should sit outside the master entirely.

  3. 3

    Choose cylinders and keyway

    We match the system to your doors and your security needs. Options include standard keyways or restricted keyways with controlled blanks, plus compatibility with existing hardware where it is worth keeping.

  4. 4

    Install and pin or rekey on site

    Because we are mobile, we do the work at your property. Cylinders are installed, rekeyed, or pinned to the agreed hierarchy, and each lock is tested with its intended keys and confirmed not to open with the wrong ones.

  5. 5

    Cut keys and set up key control

    We cut and label keys, document the system, and help you set a sign-out and duplication policy. Restricted keys can only be copied through authorized channels, which gives you a real record of who holds access.

  6. 6

    Plan for staffing changes

    Employees leave and tenants change. We explain how the system can be re-keyed in part, so a single lost key or departed employee does not force you to replace every lock in the building.

Need master key system in Tarzana?

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What affects the price

  • Number of doors and cylinders included in the system
  • Depth of the hierarchy: how many levels of master, group, and individual keys you need
  • Standard versus restricted keyway and the level of key control you want
  • Condition and type of existing hardware, and whether any locks need replacing rather than rekeying
  • Number of keys to be cut and how many users will hold them
  • Whether the work is a new design or an expansion or repair of an existing system, and the timing of the visit

Why Tarzana chooses us

  • Fully mobile: we do the design review, installation, and key cutting at your Tarzana property, with no shop trip in the middle.
  • In business since 1987, with owner and lead tech David Shar directly involved in the work.
  • We design around how your people actually work, not a one-size template, including which areas should stay off the master.
  • Restricted-key and key-control options so duplicates are tracked, not casually made.
  • Available 24/7 for urgent issues such as a lost master key or a sudden staff departure.
  • We document the system clearly so future changes are easier for you and for any locksmith.

Master Key System across Tarzana

Tarzana splits naturally along Ventura Blvd, and the locks on each side reflect it. The Ventura Blvd medical and commercial corridor, running through ZIP codes 91356 and 91357, is dense with professional offices, many near Providence Cedars-Sinai Tarzana Medical Center. Suites there often need layered access: front-of-house staff, clinicians, billing, and cleaning crews each need different doors. A master key system with sensible key control can make staffing changes far less disruptive.

North of the Boulevard, the Tarzana flats hold 1950s ranch homes, apartments, and small commercial properties along roads like Reseda Blvd, Tampa Ave, and Wilbur Ave. Older buildings and managed apartment properties often have a mixture of builder hardware and keys that nobody can account for. A master-key plan can bring order, giving a manager access to common areas and units while each tenant keeps a private key.

South of the Boulevard and toward the El Caballero area and Mulholland Dr, larger estates and gated properties bring their own needs: guest houses, pool areas, offices, and gates that benefit from coordinated keying. Whether you are off Lindley Ave, near Corbin Ave, or just off the US-101, we come to you and build the system on site.

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Other Tarzana locksmith services

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

Master Key System in Tarzana — FAQs

What is a master key system?
It is a keying plan where each lock has its own key, groups of locks share a group key, and one master key opens everything. It gives managers broad access while limiting what each user can open.
Is a master key system a good fit for a medical office on Ventura Blvd?
Often yes. Suites usually have areas with different access needs, like front desk, exam rooms, records, and storage. We can design the hierarchy so staff changes do not force a complete re-key. Call (323) 997-8867 to talk through your layout.
What is a restricted key system?
A restricted keyway uses key blanks that are not freely available, so copies must go through an authorized source. This gives you far better control over who can duplicate keys than a standard hardware-store keyway.
Can you convert my existing locks into a master system?
In many cases, yes. We inspect the current cylinders and hardware, then rekey or replace as needed. Some older or mismatched locks are better replaced, and we tell you plainly which ones.
What happens if a master key is lost or an employee leaves?
Depending on the design, we can often rekey only the affected levels rather than the whole building. If it is urgent, call (323) 997-8867 any time, since we are available 24/7.
Do you offer systems for apartments or rental properties on the Tarzana flats?
Yes. A manager or owner key for common areas and units, with separate tenant keys, is a common setup. We can also rekey between tenants without rebuilding the whole system.
Do I need to come to a shop?
No. Crenshaw Lock Company is fully mobile with no storefront. We come to your Tarzana property, do the work on site, and cut keys there.
How is the cost of a master key system determined?
It depends on the number of doors, the depth of the hierarchy, the keyway, the condition of your hardware, and how many keys are needed. We review these with you on site before work begins.
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