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Crenshaw Lock

Master Key System in Granada Hills · 24/7 mobile

Master Key System in Granada Hills, California

Crenshaw Lock Company designs and installs master key and restricted key systems with key control for Granada Hills properties. We are fully mobile and available 24/7, coming to your building rather than a storefront. Call (323) 997-8867 to plan a system that fits your doors and your people.

  • Mobile to your Granada Hills 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 as few keys as possible. A property manager might carry one key that opens every unit's common areas, while each tenant's key opens only their own space. A church, school-adjacent office, or small medical practice might need tiers: a custodian who reaches the supply rooms, a manager who reaches everything, and staff who reach only their own area. Done well, it cuts the ring of keys on every belt and makes it clear who can get where.

The design work matters more than the hardware. Before any cylinder is pinned, we sit down with you and map your doors, your roles, and what happens when someone leaves. We also talk about restricted keyways, where the key blanks are controlled and cannot be casually duplicated at a hardware-store kiosk. That is what turns a convenient system into one with real key control. Because we have been working in the Los Angeles area since 1987, we have seen what happens when a system is planned poorly: lost keys that force a full re-do, or a master that quietly ended up in too many hands.

Granada Hills is a mix of mid-century ranch homes, older commercial strips along Chatsworth St and Devonshire St, foothill properties, and multi-building sites that have grown over decades. Many of them still run on a patchwork of unrelated keys. We work with the owner, David Shar, and our technicians come to you in a fully mobile setup, so the system can be designed, installed, and tested on your property with your doors in front of us.

How it works in Granada Hills

  1. 1

    Walk the property and list every door

    We come to your location and go through every lock: exterior doors, offices, storage rooms, utility closets, gates, and any padlocks or cabinets you want included. We note the existing hardware, what can be rekeyed, and what needs replacing.

  2. 2

    Define who needs access to what

    We help you set up a key hierarchy: a grand master if you want one, master keys for groups of doors, and individual change keys. We talk through real roles, such as owners, managers, staff, cleaners, contractors, and tenants, so the plan reflects how your building actually runs.

  3. 3

    Choose the keyway and level of key control

    You can use a standard keyway or a restricted one where key blanks and duplication are controlled. We explain the trade-offs honestly, including convenience for you and difficulty for anyone trying to copy a key without authorization.

  4. 4

    Pin, install, and test the cylinders

    We build the cylinders to the agreed key chart, install or rekey them on site, and test every key against every door. A master system leaves little room for error, so we check that each key opens only what it should and nothing it should not.

  5. 5

    Deliver keys and document the system

    We hand over the keys and a clear record of the key chart, so future additions follow the same logic. We also go over how to issue keys, track them, and what to do if one is lost.

  6. 6

    Plan for growth and changes

    Businesses add suites, tenants turn over, and staff come and go. We leave the system able to expand where possible, and we are available around the clock if a lost master key means you need to act quickly.

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What affects the price

  • The number of doors and cylinders included in the system, since each one must be keyed to the chart.
  • The structure of the hierarchy: a single master is simpler than multiple masters plus a grand master.
  • Whether you choose a standard keyway or a restricted keyway with controlled key blanks and duplication.
  • The condition and type of existing hardware, and whether locks can be rekeyed or must be replaced.
  • Door types and special locations, such as hillside gates, cabinets, or older mortise hardware that needs extra work.
  • Timing and access, including after-hours work or a staged installation across several buildings.

Why Granada Hills chooses us

  • We have served Greater Los Angeles and Ventura County since 1987, so we have seen many master key systems succeed and fail over the years.
  • Everything is mobile. We design and install at your property, with no storefront trip and no guesswork about your actual doors.
  • We plan the key hierarchy with you before touching a cylinder, so the system matches your real staffing and tenant setup.
  • We explain restricted keyways and key control plainly, including the limits, so you can decide what level of protection makes sense.
  • We are available 24/7, which helps when a master key goes missing and the system needs attention outside business hours.
  • We leave you with a clear key chart so future additions do not undo the design.

Master Key System across Granada Hills

Granada Hills spreads across ZIP codes 91344 and 91394, and the places that need key control vary a lot. Along Chatsworth St in Old Granada Hills, and on commercial stretches of Devonshire St, Balboa Blvd, and San Fernando Mission Blvd, small offices, shops, and multi-suite buildings often rely on a pile of unrelated keys added over the years. A master system can bring those suites and shared rooms under one organized plan.

The residential side matters too. In Balboa Highlands, the Joseph Eichler mid-century tract, and in the 1950s and 1960s ranch homes of Knollwood and Old Granada Hills, a family or landlord may want all doors keyed alike, or a simple master setup across a main house, guest unit, and garage. On Eichler homes we are mindful of preserving the original look of the entry hardware. Foothill properties near O'Melveny Park and Bee Canyon sometimes have driveway gates, outbuildings, and equestrian-area structures that benefit from a single key plan, and heat and dust can make gate locks stick, so we check their condition during the walkthrough.

Institutions and larger sites in the area, from properties near Granada Hills Charter High School to clubs and community buildings around Knollwood Country Club, often need tiered access for staff, volunteers, and maintenance. Whether you are reached from Balboa Blvd, Zelzah Ave, Hayvenhurst Ave, or the I-405 and SR-118 corridors, we come to you. Call (323) 997-8867 any time.

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Other Granada Hills locksmith services

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

Master Key System in Granada Hills — FAQs

What is a master key system?
It is a lock setup in which each door has its own key, but one or more higher-level keys open multiple doors. It lets managers or owners access many spaces with one key while others only open their own.
Can you set up a master key system for a small business in Granada Hills?
Yes. Small offices and shops are common candidates. We come to your location, review your doors, and design a hierarchy that fits your staff. Call (323) 997-8867 to discuss your site.
What does a restricted keyway do?
A restricted keyway uses key blanks that are controlled, so keys cannot easily be copied at ordinary key-cutting kiosks. It adds a layer of key control, though it works best combined with good key-issuing habits.
Can my existing locks be used in a master system?
Often yes. Many quality cylinders can be rekeyed into a system. Worn, mismatched, or damaged hardware may need replacement, and we assess that during the on-site walkthrough.
Can a landlord or property manager use this for multiple units?
Yes. A common layout gives each tenant a key to their own unit while a master opens shared areas or all units, depending on your needs and legal and lease considerations.
What happens if a master key is lost?
A lost master is a serious matter because it opens many doors. Depending on the design, we may rekey affected cylinders or revise the system. We are available 24/7 at (323) 997-8867 if this happens.
Do you have a shop I can visit?
No. We are fully mobile only. We come to your Granada Hills property, and the work is done on site.
Can I add doors to the system later?
Usually yes, if the system was planned with growth in mind. Keep the key chart we provide so new cylinders can be pinned to fit the existing hierarchy.
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