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Crenshaw Lock

Master Key System in La Habra Heights · 24/7 mobile

Master Key System in La Habra Heights, California

Crenshaw Lock Company designs and installs master key and restricted-key systems in La Habra Heights, California, with full key control. We are fully mobile and available 24/7, so we come to your property. Call (323) 997-8867 to plan a system for your house, barn and outbuildings.

  • Mobile to your La Habra Heights location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Large ring of master system keys with colored key caps
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A master key system lets one key open many locks while other keys open only their own. In La Habra Heights, that usually does not mean an office tower. It means a one-acre hillside estate with a main house, a guest casita, a pool house, a workshop and a gate. It can also mean a ranch with a barn, tack room and caretaker quarters. Carrying a ring of eight or ten keys is a nuisance, and it gets worse when someone new joins the household or the staff.

Our work is designing the hierarchy first and installing hardware second. We decide who needs access to what, whether that is the owner, a housekeeper, a ranch hand, a contractor or a caretaker. Then we build a keying structure that matches. Where the property calls for it, we add restricted keyways. These keys cannot be copied at a hardware store counter, so you control who can make duplicates.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, under owner and lead technician David Shar. We are mobile only. There is no storefront to drive to, which suits a canyon community where the nearest shop can be a long way down the hill. We bring the tools and work on your property.

How it works in La Habra Heights

  1. 1

    Walk the property and list every lock

    We start by walking the property with you, or reviewing it by phone. We note every door, gate, padlock, cabinet and outbuilding, along with the hardware already in place and what can be reused.

  2. 2

    Map who needs access to what

    We build an access plan with you. It may include a top-level key for the owner, a key for the main house, a key for the barn and outbuildings, and limited keys for staff or contractors. Changes in caretakers or household help are planned for now.

  3. 3

    Choose the keying and key control level

    We recommend a standard master-keyed setup or a restricted keyway with controlled duplication, depending on how tight you want control. We explain the tradeoffs in plain terms, including how master keying affects security.

  4. 4

    Install and rekey on site

    Our mobile technician rekeys existing cylinders or installs new hardware at each opening. We also add high-security deadbolts where an entry needs an upgrade. Everything is done at your property.

  5. 5

    Test every door and label the key set

    We test each key against each lock, confirm that keys do not open what they should not, and give you a key schedule recording which key opens what.

  6. 6

    Set up key control going forward

    We explain how to issue, track and retrieve keys, and how to add or retire keys later. When staff change, you can rekey specific locks rather than start over.

Need master key system in La Habra Heights?

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 locks, doors, gates and outbuildings that need to join the system.
  • How many levels the hierarchy has, such as owner, house, barn, and limited staff access.
  • Whether you choose a standard keyway or a restricted, patent-protected keyway with controlled duplication.
  • Whether existing hardware can be rekeyed or some locks need replacing with higher-security hardware.
  • How many keys you need cut, and for how many people or roles.
  • Whether the visit is scheduled or after hours, and the travel involved for a hillside or canyon property.

Why La Habra Heights chooses us

  • Fully mobile service. We come to a Hacienda Road estate or a canyon ranch rather than expecting you to bring locks to a shop.
  • Available 24/7, which matters when a caretaker leaves abruptly and you want the locks changed right away.
  • In business since 1987, with owner David Shar leading the technical work.
  • We plan the access structure with you before touching hardware, so the system fits how your property is used.
  • We are candid about tradeoffs: master keying adds convenience and also adds some risk, and we help you decide where it makes sense.
  • We handle high-security deadbolts and safes as well, so a single visit can cover the whole property.

Master Key System across La Habra Heights

La Habra Heights is a semi-rural canyon community. Lots are at least an acre, commercial activity is minimal, and many properties have long private driveways, perimeter gates, intercoms and several outbuildings. Master key systems here are mostly about estates and ranches rather than offices. A home along the Hacienda Road corridor may have a main house, guest quarters and a workshop that all deserve different levels of access.

In the Powder Canyon area near the Hacienda Hills Trail, hillside custom homes often combine house locks, gate hardware and storage buildings. Around the Hacienda Golf Club area, owners often value convenience and tighter control over who holds keys. A ranch or equestrian owner who changes caretakers might want the house, barn and outbuildings brought into one controlled system, so the departing person's keys no longer work.

We serve ZIP code 90631 and reach properties off Hacienda Rd, Fullerton Rd, Skyline Dr and Harbor Blvd. Since there is no storefront nearby, a mobile technician is the practical choice. Call (323) 997-8867 to talk through your property.

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Other La Habra Heights locksmith services

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

Master Key System in La Habra Heights — FAQs

What is a master key system?
It is a keying design where each lock has its own key, and a higher-level key opens several locks. For a La Habra Heights estate, that might mean one key for the house and barn, while a worker's key opens only the barn.
Can you make one system for my house, barn and outbuildings?
Yes. We can rekey or replace cylinders across the buildings so they follow one plan. Call (323) 997-8867 and we can talk through your layout.
Should I rekey after changing caretakers?
In most cases, yes. Old keys may still be out there. Rekeying the affected locks makes those keys useless, and a master system lets you do it without handing out a new key for every door.
What is a restricted key system?
It uses a keyway whose blanks are controlled, so duplicates generally cannot be cut at a typical key counter. That helps you track who has copies.
Do you come to hillside and canyon properties?
Yes. We are fully mobile and work at your property. Our service covers La Habra Heights, including ZIP code 90631, and we are available 24/7.
Does master keying reduce security?
It adds some risk because more keys open more locks, and the system can be more complex to pick. We help you decide where to use it and where to keep separate keys, such as for a safe room.
Can you also fix my gate keypad or open a safe?
We handle high-security deadbolts and safes as well. For gate operators and intercoms, call (323) 997-8867 and describe the problem so we can say what we can do.
How much does a master key system cost?
It depends on the number of locks, the levels of access, the keyway type and whether hardware needs replacing. We explain these factors and give a quote after learning about your property.
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