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Crenshaw Lock

Master Key System in Northridge · 24/7 mobile

Master Key System in Northridge, California

Crenshaw Lock Company designs and installs master key and restricted key systems with key control for Northridge, California properties. Our fully mobile locksmiths are available 24/7 and come to your site. Call (323) 997-8867 to talk through your buildings, doors, and who needs access to what.

  • Mobile to your Northridge location
  • Available 24/7
  • Price quoted before we start
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A master key system lets many different locks be opened by their own individual keys while a higher-level key opens all or part of them. For a property manager, school facility, medical office, or owner with several buildings, that means one person can carry a small set of keys instead of a ring that weighs down a pocket. Done well, it also means you know exactly who can open what, and you can change that without replacing every lock.

Northridge is a good example of why planning matters. The area mixes student-rental apartment stock around CSUN, 1950s and 60s ranch tract homes, newer condos, commercial strips along Reseda Blvd, Nordhoff St, and Devonshire St, and horsekeeping properties in Sherwood Forest. Each of these has a different access pattern. A landlord with a block of units needs turnover-friendly rekeying. A horse property needs barn, tack room, and gate locks that work together. A small business wants staff to open the shop but not the office.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner David Shar. We are mobile only, with no storefront, so every consultation and installation happens at your property. We design the key hierarchy on paper first, then install, so the system fits how your property is actually used rather than how a catalog assumes it is.

How it works in Northridge

  1. 1

    Walk the property and list every door

    We come to your site and go through each door, gate, cabinet, and padlock position. We note existing hardware, its condition, and which pieces can be reused. In Northridge that can mean anything from apartment unit doors near campus to older tract-home hardware or barn latches outdoors.

  2. 2

    Map who needs access to what

    Together we decide the levels of access: individual keys, group keys for a building or department, and a top master. We also decide whether a grand master is warranted. This is the planning step that prevents expensive changes later.

  3. 3

    Choose a keyway and level of key control

    A standard system uses keys that can be copied widely. A restricted keyway limits duplication to authorized people with proper credentials. We explain the tradeoffs so you can pick control that matches your risk, such as high student turnover versus a small private estate.

  4. 4

    Prepare the hardware, including problem doors

    Locks are rekeyed or replaced to the new bitting plan. Doors that bind, such as frames shifted by earthquake settling in older homes, are checked and aligned so the new cylinders operate smoothly rather than hiding a mechanical issue.

  5. 5

    Install, test, and label

    We install and test every lock with its intended keys, plus the masters, and confirm that keys do not open doors they should not. Keys are stamped or coded as appropriate and a record is organized for you.

  6. 6

    Document the system for future changes

    You receive a clear key schedule describing the hierarchy. When a tenant moves out, a staff member leaves, or you add a building, the system can be expanded or rekeyed without starting over. We are available 24/7 if a key is lost and something needs attention quickly.

Need master key system in Northridge?

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What affects the price

  • The number of locks and doors involved, since each cylinder must be pinned to the plan.
  • Whether existing hardware can be rekeyed or must be replaced to work in the system.
  • The depth of the hierarchy, such as a simple master versus multiple group levels and a grand master.
  • The level of key control chosen, from standard keyways to restricted keyways with controlled duplication.
  • The condition of doors and frames, including any alignment or repair needed so locks function properly.
  • Whether the work is done in one visit or phased across buildings, and whether it is outside normal business hours.

Why Northridge chooses us

  • Mobile only: we come to your property, so we see the real doors, gates, and frames instead of working from guesses.
  • In business since 1987 under owner and lead tech David Shar, with long experience across Los Angeles and Ventura County properties.
  • We plan the hierarchy before touching a lock, which avoids the common problem of a system that cannot grow.
  • We pay attention to doors, not just cylinders, so a binding frame is addressed instead of masked.
  • We explain restricted versus standard keys plainly, including their limits, and do not push more than you need.
  • Available 24/7, so a lost master key or urgent rekey does not have to wait for business hours.

Master Key System across Northridge

Northridge properties ask for master key systems for different reasons. Around the CSUN and university district, apartment owners deal with constant turnover. A complex on Reseda Blvd preparing for fall semester move-in is a typical case: a block of units needs rekeying, with each tenant getting a unique key and the manager holding a master to the building. Planning that once saves repeat work each year.

In Sherwood Forest, horsekeeping estates in ZIP 91326 area style properties often have barn doors, tack rooms, pedestrian gates, and a driveway gate. A system that keys these alike for the owner, with separate keys for a trainer or caretaker, keeps access organized outdoors where weather is hard on hardware. In the Devonshire residential area and Northridge Village, we see older 1950s-60s ranch tract homes where hardware is aging, and 1994 earthquake settling can leave frames out of true so deadbolts bind. Aligning the door before rekeying matters.

We work across ZIP codes 91324, 91325, 91327, 91328, and 91330, including businesses near the Northridge Fashion Center, medical offices near Northridge Hospital Medical Center, and shops along Devonshire St, Nordhoff St, and Balboa Blvd. Whether you use Ronald Reagan Fwy (SR-118) or surface streets like Tampa Ave and Zelzah Ave to reach us, we come to you. Call (323) 997-8867 any time.

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Other Northridge locksmith services

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

Master Key System in Northridge — FAQs

What is a master key system?
It is a lock arrangement where each lock has its own key, while a master key opens a defined group of locks. Larger systems add group levels and a grand master. We design the structure around how your Northridge property is used.
Can you set up a system for a student apartment complex near CSUN?
Yes. We plan unit keys, building masters, and a way to rekey units at turnover without redoing the whole property. Call (323) 997-8867 to discuss timing ahead of fall move-in.
Can my existing locks be used?
Often they can be rekeyed into the system, depending on brand, condition, and how many key levels you want. Some may need replacement. We check each one during the walkthrough.
What is a restricted key system?
It uses a keyway and controls on duplication so keys cannot easily be copied at a general key shop. It adds accountability, though no system is a guarantee. We explain the tradeoffs before you decide.
Do you handle barns, gates, and tack rooms on horse properties?
Yes. For Sherwood Forest style properties we can key barn, tack-room, and gate locks alike, with separate keys for other people if needed. Call (323) 997-8867 to describe your setup.
My front door deadbolt sticks since the house settled. Does that affect rekeying?
It can. A shifted frame makes deadbolts bind, and new cylinders will not fix the cause. We realign the door as part of the work so the lock operates properly.
Can the system be expanded later?
A well-planned one can. We leave room in the design for added doors, tenants, or buildings, and give you a key schedule so changes are organized.
Are you available outside business hours?
Yes, we are 24/7 and fully mobile, with no storefront. If a master key is lost or compromised, call (323) 997-8867 and we will discuss next steps.
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