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Crenshaw Lock

Master Key System in Norwalk · 24/7 mobile

Master Key System Design and Installation in Norwalk, CA

Crenshaw Lock Company designs and installs master key and restricted-key systems with key control for Norwalk, California landlords, retailers, and property managers. We are a fully mobile locksmith available 24/7, and we come to your property. Call (323) 997-8867 to plan a system.

  • Mobile to your Norwalk 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 individual key opens only its own. For a Norwalk property owner, that can mean a ring of keys cut down to one per person, tenants who can't open each other's units, and a clear record of who holds what. Done well, it saves time on every turnover and every staffing change. Done poorly, it creates a weak system that is hard to maintain.

Norwalk has a lot of properties where this matters: older apartment buildings along Pioneer Blvd, Firestone Blvd, and Rosecrans Ave, small retail strips around Norwalk Town Square, and offices and shops near the Civic Center. Many of these still run on mismatched, worn hardware that has been rekeyed ad hoc over decades. A planned system replaces that patchwork with a logical structure.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, led by owner and lead technician David Shar. We are mobile only, with no storefront, so every consultation and installation happens on site at your building, where we can see the doors, the hardware, and how people actually use the space.

How it works in Norwalk

  1. 1

    Walk the property and talk through access needs

    We come to your building and look at every door that will be part of the system: unit doors, utility rooms, offices, gates, and storage. We ask who needs access to what, and who should never have it.

  2. 2

    Design the key hierarchy

    We lay out the levels: individual change keys, group or master keys for areas such as a floor or building, and a grand master if one is needed. We explain the tradeoffs, since each added level adds some complexity and security considerations.

  3. 3

    Choose the keyway and level of key control

    You can use a standard keyway or a restricted one, where key duplication is limited to authorized people. Restricted keyways suit landlords and businesses that want to prevent copies being cut casually.

  4. 4

    Assess and replace worn hardware

    Cylinders that are seized or badly worn do not belong in a master system. We check existing locks, such as old Kwikset cylinders and aging tubular deadbolts, and replace what won't hold up.

  5. 5

    Pin, install, and test every lock

    We pin the cylinders to the design, install them, and test each key against each door, including the keys that should not work. Nothing is handed over until it behaves as planned.

  6. 6

    Document the system and set up key control

    We give you a key schedule showing which keys open which doors, and advise on tracking keys issued, so future turnovers and departures are easy to manage.

Need master key system in Norwalk?

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

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What affects the price

  • The number of doors and locks to be included in the system.
  • How many levels the hierarchy has, such as change keys, master keys, and a grand master.
  • Whether you want a restricted keyway with duplication controls or a standard keyway.
  • The condition of existing hardware and how many cylinders must be replaced instead of re-pinned.
  • The grade and type of locks you choose, such as deadbolts, knob sets, or commercial cylinders.
  • Whether work is scheduled during regular hours or requires an after-hours or emergency visit.

Why Norwalk chooses us

  • Fully mobile service: we come to your Norwalk property and design around your actual doors, not a catalog.
  • In business since 1987, with a lead technician who has worked on older residential and commercial hardware for decades.
  • Honest advice on hierarchy depth, since an overbuilt system can be harder to secure and maintain than a simpler one.
  • We replace worn or seized cylinders instead of forcing them into a system they can't reliably support.
  • 24/7 availability, useful when an employee departure or tenant issue means locks need attention outside business hours.
  • Clear written key schedules so you know what each key opens.

Master Key System across Norwalk

Norwalk's building stock makes master key planning especially practical. Along Pioneer Blvd, Firestone Blvd, and Rosecrans Ave there are many 1960s and 70s stucco apartment buildings with worn cylinders, and a landlord there often faces rekeying units one at a time on every tenant turnover. A master key system, paired with replacement of tired Kwikset cylinders, can make that routine instead of a recurring scramble. Properties in the 90650 ZIP code, which covers much of central Norwalk, include plenty of these multi-unit buildings.

Commercial users are just as common. Small retailers in the Norwalk Town Square and Civic Center district may have several employees with keys, and after a departure they need to know the keys in circulation still match the locks. In the 90651 and 90652 areas, including the Carmenita Road corridor and the Cerritos College and Studebaker Road area, we also see small offices, shops, and mixed-use properties that benefit from organized access.

Because Norwalk sits along I-5 and I-605 and near the Norwalk Metro C Line station and Metrolink station, many owners manage properties from elsewhere. Our mobile, 24/7 service means we can meet you or your on-site manager at the property. Call (323) 997-8867 to talk through your building.

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Other Norwalk locksmith services

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

Master Key System in Norwalk — FAQs

What is a master key system?
It is a lock setup where each lock has its own key, and one or more higher-level keys open multiple locks. For example, each tenant's key opens only their unit, while a manager's master key opens all of them.
Is a master key system a good fit for a Norwalk apartment building?
Often yes. Landlords of older buildings along Pioneer, Firestone, and Rosecrans deal with frequent turnover. A system lets you rekey units more predictably and carry one key instead of many. Call (323) 997-8867 to discuss your building.
What is a restricted key system?
It uses a keyway whose blanks are not freely sold, so copies generally require authorization. It adds key control, which matters if you want to prevent tenants or employees from duplicating keys at a hardware store.
Can you convert my existing locks into a master system?
Often, if the cylinders are in good condition and compatible. Worn or seized ones, common on older Kwikset sets, usually need replacement first. We inspect on site and tell you what is worth keeping.
Do you offer service after hours for a retail space?
Yes. We are available 24/7 and fully mobile, so if an employee leaves and you need locks addressed outside business hours, call (323) 997-8867.
Does a master key system reduce security?
A master system adds some inherent tradeoffs, since more key combinations are possible. A well-designed system with good cylinders and key control keeps risk low. We will be candid about how many levels make sense for you.
Do you have a shop I can visit in Norwalk?
No. We are mobile only and come to your property, which lets us see the actual doors and hardware before recommending a design.
What should I have ready before the consultation?
A rough list of doors, who needs access to what, and how many keys are currently out. If you have an old key list or floor plan, bring it, but it is not required.
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