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Crenshaw Lock

Master Key System in Sun Valley · 24/7 mobile

Master Key System Installation in Sun Valley, CA

Crenshaw Lock Company designs and installs master key and restricted key systems with key control for Sun Valley, California businesses. We are fully mobile and available 24/7, coming to your warehouse, yard or office. Call (323) 997-8867 to talk through your doors and who needs access to them.

  • Mobile to your Sun Valley location
  • Available 24/7
  • Price quoted before we start
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A master key system lets one person, such as an owner, facility manager or operations lead, open every door in a building, while each employee, tenant or vendor carries a key that opens only what they need. In Sun Valley, where warehouses, manufacturing shops, auto-dismantlers and recycling yards fill the San Fernando Road corridor, that structure matters. A single ring of loose keys that nobody can account for is a common source of theft, and a staff change can quietly leave a dozen unknown copies in circulation.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar has seen how access problems build up in industrial properties. Doors get added over the years, padlocks are bought one at a time, and eventually no one knows who holds what. A planned master key system replaces that patchwork with a clear hierarchy: a grand master, sub-masters for departments or buildings, and individual change keys.

We are a mobile-only service, so there is no storefront to visit. We come to your site, walk the doors with you, and design the system around how your operation really runs. That includes roll-up doors, man-doors, office doors, gates and padlocks, and where it makes sense, restricted keyways so copies cannot be cut at a hardware store counter.

How it works in Sun Valley

  1. 1

    Walk the site and list every opening

    We start by visiting your property and listing every lock: office doors, man-doors, roll-up doors, yard gates, cabinets and padlocks. In a Sun Valley yard or warehouse this often reveals mixed brands and old hardware that affect the design.

  2. 2

    Map who needs access to what

    We sit down with you to decide who holds the grand master, who gets department or building sub-masters, and who gets a single-door key. Shift workers, drivers, contractors and cleaning crews often each need a different level of access.

  3. 3

    Design the keying hierarchy

    We lay out the key schedule on paper, with the levels of access, the number of keys per level and which locks share a keyway. We also discuss growth, so you can add doors or staff later without redoing the system.

  4. 4

    Choose hardware and key control level

    You choose between a standard keyway and a restricted, patent-protected keyway, where duplication is limited to authorized requests. For yards and exposed gates we recommend hardened padlocks and gate hardware that resist cutting and prying.

  5. 5

    Install, rekey and test on site

    We install new cylinders or rekey existing hardware, then test every key against every lock to confirm each one opens only what it should. Doors that stick or hardware that is failing are flagged before we finish.

  6. 6

    Hand over keys and a record

    You receive the keys, a key schedule and guidance on keeping a log of who holds which key. Good records are what make key control work after the installation is done.

Need master key system in Sun Valley?

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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 of access the hierarchy needs, such as grand master, sub-masters and individual keys.
  • Standard keyway versus a restricted keyway with controlled key duplication.
  • Condition of existing hardware, since worn or mismatched locks may need replacing rather than rekeying.
  • Hardware grade for exposed locations, such as hardened padlocks, gate locks and roll-up door locks.
  • The number of keys to be cut and whether the work is scheduled in advance or after hours.

Why Sun Valley chooses us

  • Fully mobile service: we work at your warehouse, yard or office instead of asking you to bring locks anywhere.
  • Available 24/7, so urgent changes after a break-in or sudden staff departure do not have to wait for business hours.
  • Operating since 1987, with owner David Shar directly involved in the work.
  • Systems designed around your actual workflow, not a one-size template, with room to grow.
  • Experience with industrial hardware such as roll-up door locks, hardened padlocks and gate locks that suit rough, exposed yards.
  • A written key schedule at handover so you know what each key opens.

Master Key System across Sun Valley

Sun Valley is an industrial district at the base of the Verdugo Mountains, and much of its commercial life runs along San Fernando Road and the corridor behind Hollywood Burbank Airport. Auto-dismantlers, recycling yards and manufacturers here deal with theft pressure, high staff turnover and vehicles and equipment moving in and out. We see a yard needing hardened gate and padlock hardware after a break-in, or a warehouse near the airport that wants its roll-up door and man-door rekeyed onto a single organized system once employees have changed.

We work around Glenoaks Boulevard, Sunland Boulevard, Vineland Avenue, I-5 and CA-170, reaching businesses in ZIP code 91352 and nearby. The LADWP Valley Generating Station smokestacks are a familiar landmark across the district, and the businesses beneath them often have older buildings with a mix of door types that benefit from a consolidated key plan.

Our master key work is not only commercial in feel. Stonehurst, with its 1920s stone and clinker-brick houses, includes small offices, rental properties and multi-door homes where original hardware needs a sympathetic deadbolt upgrade and a rekey. Whether you manage a yard off San Fernando Road or a property in Stonehurst or near La Tuna Canyon, we can plan keying that fits it.

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Other Sun Valley locksmith services

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

Master Key System in Sun Valley — FAQs

What is a master key system?
It is a keying plan in which each lock has its own key, but higher-level keys can open multiple locks. A grand master opens everything, sub-masters open groups of doors, and change keys open one. It lets you control access without carrying a huge ring of keys.
Can you set up a master key system for a warehouse in Sun Valley?
Yes. We regularly plan keying for warehouses and industrial buildings, including man-doors, offices and roll-up doors. Call (323) 997-8867 and we can talk through your layout and schedule a visit.
Do you handle yard gates and padlocks as part of the system?
Yes. Auto yards and recycling operations along San Fernando Road often need hardened padlocks and gate hardware. We can include them in the same keying plan so one hierarchy covers buildings and gates.
What is a restricted keyway and do I need one?
A restricted keyway uses a protected key blank that cannot be freely duplicated, so copies require authorization. It is worth considering when you have many employees or contractors and want tighter key control. Standard keyways cost less but offer less control.
Can my existing locks be converted into a master system?
Often they can, if they are in good condition and compatible. Some mixed or worn hardware will need to be replaced. We assess this during the site walk so you know what is reusable.
Do you offer 24/7 service for key emergencies?
Yes. We are available 24/7 and fully mobile. If a key goes missing or an employee leaves on bad terms, call (323) 997-8867 and we can talk through rekeying options.
Can you work on historic homes in Stonehurst?
Yes. For 1920s homes we focus on sympathetic upgrades, such as adding a modern deadbolt and rekeying while respecting the original hardware wherever practical.
Do I have to come to a shop to get this done?
No. Crenshaw Lock Company is mobile only, so there is no storefront to visit. We come to your Sun Valley site and do the design, installation and testing there.
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