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Crenshaw Lock

Master Key System in Sylmar · 24/7 mobile

Master Key System in Sylmar, California

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

  • Mobile to your Sylmar 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 the fewest keys possible. A property manager might carry one key that opens every unit. A tenant opens only their own space. A maintenance crew opens the utility rooms and nothing else. When it is planned well, you carry fewer keys, you know who holds access to what, and a lost key does not mean rekeying an entire building.

Sylmar is a spread-out community, and the properties here vary widely. It climbs from the valley floor into the San Gabriel foothills. It includes small office and light-commercial buildings, multi-unit and rental properties, gated subdivisions, and large-lot equestrian properties with barns and outbuildings. Each one calls for a different layout. A sprawling property with a main house, a guest house, a barn, and a tack room has very different needs from a small professional building with a handful of suites.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar is the person behind the work. We are mobile only. There is no storefront to visit, so we come to you, look at the doors you actually have, and build the system around them. We can also set up restricted keyways, which means keys that cannot be copied at a hardware store without authorization, so key control stays in your hands.

How it works in Sylmar

  1. 1

    Walk the property and map the doors

    We start by visiting the site and listing every door, gate, padlock, and cabinet that needs a lock. On a Sylmar property that may include entry doors, side gates, a detached garage, a barn, and a tack room. We note what hardware is already there and what condition it is in.

  2. 2

    Decide who needs access to what

    Next we talk through the people involved: owners, managers, tenants, employees, contractors, and family members. We sort them into access levels, such as one key for a single door, one for a group of doors, and one for everything. This hierarchy is the foundation of the system.

  3. 3

    Design the key hierarchy

    We lay out the structure, with change keys for individual doors, sub-master keys for groups, and a grand master where it makes sense. We also discuss whether to use a restricted keyway so that duplication requires your authorization. We explain the trade-off between convenience and security in plain terms, because a larger system with more levels has more built-in compromises.

  4. 4

    Select hardware that suits the setting

    We match cylinders and locks to the location. Interior office doors, exterior gates, and barn padlocks exposed to Santa Ana dust and grit all need different hardware. Where an existing lock cannot be integrated, we tell you and recommend a replacement.

  5. 5

    Install, pin, and test every lock

    We install the cylinders and cut and test the keys. We check that each key opens only what it should and that nothing else opens it. If a door is racked from settling or seismic movement and the bolt does not throw cleanly, we correct the strike and alignment so the new system works smoothly.

  6. 6

    Document the system and set up key control

    We hand over a record of the key structure and recommend a simple way to track who holds which key. If you later add a door, a tenant, or an employee, the documentation makes expanding the system far easier and safer.

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What affects the price

  • The number of doors, gates, and padlocks that need to be included in the system.
  • How many levels the key hierarchy has, such as change keys, sub-masters, and a grand master, and how many people need keys.
  • Whether you choose a restricted or patented keyway for stronger key control, versus a standard keyway.
  • The condition of existing hardware, and whether current locks can be rekeyed into the system or must be replaced.
  • Specialty needs such as weather-resistant or shrouded padlocks for barns and outdoor use, or hardware for gates and outbuildings.
  • The number of keys to be cut and any labeling or documentation you want for your records.

Why Sylmar chooses us

  • We are fully mobile and available 24/7, so we meet you at your property, not at a shop counter.
  • Serving Greater Los Angeles and Ventura County since 1987, with owner David Shar leading the work.
  • We design the system around how your people actually use the property, rather than selling a standard package.
  • We are honest about trade-offs. More levels of master keying add convenience but can reduce security, and we explain this before you decide.
  • We can address related problems on the same visit, such as misaligned deadbolts on older foothill homes or seized, dusty padlocks on equestrian properties.
  • We provide documentation so you can manage keys and expand the system later without starting over.

Master Key System across Sylmar

Sylmar covers a lot of ground, from the tract homes and older modest houses near the valley floor up to the gated subdivisions and semi-rural lots in the foothills. In neighborhoods like Rancho Cascades, newer gated properties often combine a driveway keypad or call-box with house locks, and a master key plan can tie together the front door, garage entry, and side gates under one organized system. Around El Cariso, near El Cariso Community Regional Park & Golf Course, and in the Olive View and foothill district, we see a mix of residences and small commercial and institutional sites.

Large-lot equestrian properties off Hubbard Street and Foothill Boulevard are a good fit for master keying. An owner may want one key for the house, a separate key for the barn and tack room, and a limited key for a ranch hand or boarder. Because barns and trailers are exposed to Santa Ana dust and grit, we pair the system with weather-resistant, shrouded locks that keep working. Older homes here also sometimes have frames that shifted during past earthquakes, so we check that each door closes and latches properly before keying it into the system.

We serve ZIP code 91342 and the surrounding area, including properties near Olive View-UCLA Medical Center, Veterans Memorial Community Regional Park, and the Wildlife Learning Center, and along Roxford Street and the I-5, I-210, and SR-14 corridors. Because we are mobile, we come to wherever the property is. Call (323) 997-8867 to talk through your setup.

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Other Sylmar locksmith services

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

Master Key System in Sylmar — FAQs

What is a master key system?
It is a lock arrangement where each door has its own key, and higher-level keys can open multiple doors. A manager might hold a key that opens every door, while others hold keys that open only theirs. Call (323) 997-8867 to discuss a layout for your property.
Can you set up a master key system for a home or ranch property in Sylmar?
Yes. It works well for properties with several buildings, such as a house, guest house, barn, and tack room, where different people need different access. We design it around how you use the property.
What is a restricted keyway?
A restricted keyway uses a key profile that is controlled, so duplicates generally cannot be cut without authorization. This gives you better key control than a standard key that any shop can copy.
Can my existing locks be included in the system?
Often they can be rekeyed into the system, depending on the brand and condition. Worn, damaged, or incompatible locks may need to be replaced. We check on site and tell you which is which.
How does a master key system affect security?
Adding levels adds convenience but can introduce some trade-offs, so we recommend keeping the hierarchy as simple as your needs allow. We explain these considerations before you commit.
Do you handle gates and padlocks too?
Yes. We can include padlocks and gate locks in the system, and we can recommend weather-resistant, shrouded padlocks for barns, tack rooms, and trailers exposed to dust and the elements.
What if a key is lost later?
A good system limits the damage. Depending on which key is lost, you may only need to rekey a few locks rather than the whole property. Call (323) 997-8867 and we can advise on the best fix.
Are you available outside normal business hours?
Yes. We are available 24/7 and fully mobile, so we can come to your Sylmar property when it suits you. There is no storefront, and we travel to you.
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