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Crenshaw Lock

Master Key System in La Verne · 24/7 mobile

Master Key System in La Verne, California

Crenshaw Lock Company designs and installs master key and restricted key systems in La Verne, California, with full key control. We are a fully mobile locksmith available 24/7, and we come to your property. Call (323) 997-8867 to plan a system for your building, rentals, or hangar.

  • Mobile to your La Verne 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 one key open many doors while each door still keeps its own individual key. Done well, a property manager carries one key instead of a heavy ring, a business owner can separate staff access by area, and a lost key becomes a manageable problem instead of a building-wide emergency. Done badly, it creates overlapping keys, confusion, and security gaps. The difference is almost entirely in the planning.

La Verne has an unusual mix of property types for a city its size. There are historic homes and small commercial buildings in Old Town, student rentals around the University of La Verne, newer foothill developments on the north side, and general-aviation hangars at Brackett Field. Each calls for a different approach to hierarchy, key control, and hardware, and a one-size-fits-all keying chart rarely fits any of them well.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner David Shar's work in commercial keying informs how we approach every system. We are fully mobile, so there is no storefront to visit. We meet you at the property, walk the doors with you, and build a system around how people actually use the space.

How it works in La Verne

  1. 1

    Walk the property and list every door

    We come to your location and go through each lock: entry doors, offices, storage rooms, utility closets, gates, and padlocks. We note the hardware brand, condition, and whether it can be keyed into a system or should be replaced.

  2. 2

    Define who needs access to what

    We talk through the people involved, such as owners, managers, maintenance, tenants, staff, or hangar users. From that we sketch a hierarchy: individual keys, group masters for zones or floors, and a top-level grand master if the property warrants one.

  3. 3

    Choose the key control level

    Standard keyways are easy to copy at any kiosk. If you want real control, we can discuss restricted keyways, where duplication requires authorization. We explain the tradeoffs between convenience, control, and long-term flexibility before you commit.

  4. 4

    Prepare the keying plan on paper

    Before any cylinders are changed, we put the plan in writing: which key opens which door, how many of each key are issued, and room for future expansion. Reviewing this first prevents costly changes after installation.

  5. 5

    Install and pin the cylinders

    We rekey existing compatible hardware or install new cylinders and locksets as needed, then test every key against every door it should and should not open. Since we work on site, adjustments happen in the same visit.

  6. 6

    Hand over keys and a control record

    You receive the keys, a clear record of the system, and guidance on tracking issuance and returns. When tenants turn over or staff change, the system can be adjusted without starting from scratch.

Need master key system in La Verne?

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 included in the system, since each one must be keyed to the plan.
  • The depth of the hierarchy, such as a simple master versus multiple group masters and a grand master.
  • Whether you choose a standard keyway or a restricted keyway with duplication control.
  • The condition of existing hardware, and whether locks can be rekeyed or must be replaced, which is common with older or worn commercial sets.
  • The mix of lock types involved, including mortise locks, deadbolts, padlocks, and roll-door locks, which affects labor and parts.
  • Whether the work is scheduled in advance or needed urgently after hours, and the number of keys you want cut.

Why La Verne chooses us

  • We have been keying properties across Greater Los Angeles and Ventura County since 1987, so we have seen how systems succeed and fail over years of use.
  • We plan on paper before touching a lock, which keeps the hierarchy clean and avoids overlapping keys.
  • We are fully mobile and available 24/7, so a lost master key or a security emergency does not have to wait for business hours.
  • We are honest about when a restricted keyway is worth it and when a simpler system fits better, rather than upselling everything.
  • We handle mixed hardware, from period mortise sets to hangar padlocks, so one visit can cover an entire property.

Master Key System across La Verne

La Verne's building stock makes master keying a local puzzle. In Old Town La Verne, around D Street and Bonita Ave, early-1900s Craftsman homes and small commercial spaces often carry original mortise locks or skeleton-key doors. Owners who convert or share these spaces sometimes want modern keyed systems that still respect the look of the building. We can work with mortise hardware where it makes sense and advise when a cylinder upgrade is the better call.

Around the University of La Verne, student rentals bring a recurring need: a landlord with several units wants one master for maintenance, unique keys for each unit, and a clean way to reset things at the start of a term. A planned system in the 91750 area means a departing tenant's keys stop mattering without replacing hardware throughout the property. Newer developments climbing toward North La Verne and Marshall Canyon have different needs, often shared gates, pool or clubhouse doors, and storage areas that fit a zoned system.

Brackett Field adds another category. Hangars use padlocks and roll-door locks, and a group of hangar tenants or an operator may want keyed-alike or restricted padlocks for control. Whether you are off Foothill Blvd, near Arrow Hwy, or just off the SR-210 or SR-57, we come to you for the walkthrough.

Locked out or need a locksmith now?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

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Other La Verne locksmith services

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

Master Key System in La Verne — FAQs

What is a master key system?
It is a keying arrangement where each lock has its own key, but higher-level master keys open defined groups of locks. A property manager might hold a master for all units, while each tenant holds only a key for their own door.
Can you set up a master key system for my La Verne rental properties?
Yes. We design systems for landlords and small property owners, including student rentals near the University of La Verne. Call (323) 997-8867 and we can arrange a walkthrough at the property.
Do I need a restricted keyway?
Not always. A restricted keyway makes unauthorized duplication much harder, which matters when many people hold keys or security is a concern. For a small property, a standard system with good record keeping may be enough. We explain both options.
Can my old Craftsman's mortise locks be part of a system?
Often they can, depending on the lock's condition and whether a compatible cylinder is available. In Old Town La Verne we look at each door and tell you honestly whether to keep, rekey, or replace the hardware.
Can you key hangar padlocks and roll-door locks at Brackett Field?
Yes. We can key padlocks alike or into a hierarchy and service roll-door locks. Call (323) 997-8867 to discuss the setup you need for your hangar.
What happens if a master key is lost?
It depends on the level of the key. Losing a top-level master can mean rekeying many cylinders, which is why planning and key control matter. We are available 24/7 to help you assess and respond.
Can the system grow later?
A well-planned system leaves room for added doors, new tenants, and extra levels. That is why we write the keying plan before any cylinders are installed.
Do you have a shop I can visit in La Verne?
No, we are fully mobile only. We come to your property for the walkthrough, installation, and key handover.
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