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Crenshaw Lock

High Security Locks in Rosemead · 24/7 mobile

High Security Locks in Rosemead, California

Crenshaw Lock Company installs pick-, bump- and drill-resistant high security locks and restricted keys in Rosemead, California. We are fully mobile and available 24/7, so we come to your home, rental or storefront. Call (323) 997-8867 to talk through which lock fits your door.

  • Mobile to your Rosemead location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
High-security lock cylinder with a dimple key
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A standard builder-grade deadbolt can often be defeated by someone with a little practice and a cheap tool. High security locks are built to resist the common methods: picking, bumping, drilling and forced key duplication. In Rosemead, where single-story stucco homes, garage conversions, apartment buildings and busy commercial strips sit close together, upgrading the cylinders on the doors that matter most is one of the more practical security steps an owner can take.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner David Shar leads the work. We are a fully mobile service. There is no storefront to visit; we bring the hardware, tools and key-cutting capability to your property, assess the door, and install on the spot wherever the door allows.

This page explains how a high security installation works, what affects the cost, and what is specific to Rosemead properties, from a family home near Garvey Park to a market on Valley Boulevard. If you are not sure whether you need a full upgrade or just a better cylinder, we will help you sort it out honestly.

How it works in Rosemead

  1. 1

    Talk through the goal

    We start with a call to (323) 997-8867. Tell us what you are protecting: a front door, a rear garage-conversion entry, an ADU, a storefront or several apartment units. We ask about the current locks, any past break-in attempts, and who needs keys.

  2. 2

    Inspect the door and hardware

    On site, we check the door, strike plate, frame and existing deadbolt. A high security cylinder only helps if the door and frame can hold up, so we point out weak spots like short screws, thin strikes or worn jambs, and tell you what is worth fixing.

  3. 3

    Choose the lock and key system

    We recommend a high security cylinder or deadbolt suited to the door and your needs. Options include restricted keyways, where duplicates can only be made with authorization, and hardened components that resist drilling and bumping. We explain the tradeoffs plainly.

  4. 4

    Install and reinforce

    We remove the old hardware, fit the new lock, and align the bolt cleanly with the strike. Where needed we add a reinforced strike plate with long screws that reach the framing, since stucco-era frames are often lightly secured.

  5. 5

    Cut keys and test

    We cut or program the keys, test them repeatedly, and operate the lock with the door open and closed. For multiple doors or units we can key them alike or under a master system, depending on how you manage access.

  6. 6

    Review key control

    We walk you through how to keep control of your keys, including how restricted blanks work, what to do when a tenant or employee leaves, and when rekeying is smarter than replacing the lock.

Need high security locks in Rosemead?

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What affects the price

  • The lock grade and keyway type: restricted, patent-protected key systems generally cost more than standard high security cylinders.
  • The number of doors or units, since multi-unit apartment or commercial jobs involve more hardware and more key cutting.
  • Door and frame condition: if the strike, jamb or door needs reinforcement for the new lock to be effective, that adds parts and labor.
  • Door material and type, such as a wood residential door versus an aluminum storefront door, which can require specialty cylinders or adapters.
  • Number of keys and whether you want keyed-alike or master-keyed arrangements across several locks.
  • Time of service: after-hours and emergency calls are handled 24/7, and scheduling can affect the final quote.

Why Rosemead chooses us

  • Fully mobile service: we bring the lock, key machines and tools to your door, and there is no shop to drive to.
  • Operating since 1987, with owner David Shar directly involved in the work.
  • We assess the door and frame first, and tell you honestly if a cheaper fix will do the job.
  • Experience across the property types Rosemead has: single-family homes, ADUs, apartment buildings and aluminum-storefront retail.
  • We explain key control and restricted-key systems in plain language so you know what you are buying.
  • Available 24/7, including for urgent upgrades after a break-in or a lost set of keys.

High Security Locks across Rosemead

Rosemead is a dense valley-floor city, and the security needs vary a lot block to block. In North Rosemead and South Rosemead, many homes are 1950s and 1960s single-story stucco and ranch houses. Over the years a lot of them have picked up converted garages, ADUs and additions, which means extra entry doors that often have basic, mismatched locks. Upgrading those secondary doors to high security cylinders, in the 91770 area and nearby, closes a gap many owners overlook.

Along the Valley Boulevard and Garvey Avenue corridors, and in the Garvey district, the character is commercial: aluminum-storefront retail strips, markets and restaurants. Storefront doors usually use narrow-stile hardware, so cylinder choice matters. We can fit high security cylinders suited to these doors, and rekey after a staff change. Landlords and property managers with apartment complexes in ZIP codes 91771 and 91772 often ask us about rekeying or upgrading several units after an ownership change or between tenants.

We reach customers from the Southern California Edison headquarters area to Rosemead Place, near Garvey Park, and out toward the Whittier Narrows Recreation Area, using routes such as Rosemead Boulevard (SR-19), San Gabriel Boulevard and the I-10. Because we are mobile only, you call (323) 997-8867 and we come to you, whatever the hour.

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Other Rosemead locksmith services

See all of our Rosemead services, or our citywide high security locks page.

High Security Locks in Rosemead — FAQs

What makes a lock high security?
High security locks use tighter tolerances, hardened pins and inserts, and special keyways to resist picking, bumping and drilling. Many also use restricted keys that cannot be copied at a typical hardware store counter.
Do I need a new deadbolt or just a new cylinder?
Often the cylinder is the weak point and can be upgraded while keeping the existing deadbolt body, if it is in good shape. We check on site and recommend what makes sense. Call (323) 997-8867 to discuss your door.
Will a high security lock work on my garage-conversion or ADU door?
Yes, in most cases. Converted garage and ADU doors vary a lot, so we inspect the door thickness, bore and frame first. If the door or strike is weak, we suggest reinforcement so the lock can do its job.
Can you install high security locks at my Valley Boulevard or Garvey Avenue business?
Yes. We work on aluminum-storefront doors, which often need specific cylinders or adapters. We can also rekey after an employee leaves. Call (323) 997-8867 to describe the door.
Can several apartment units be keyed the same way?
Yes. We can key units to their own keys, key doors alike where that makes sense, or set up a master-key arrangement so a property manager has access without carrying many keys.
Are restricted keys really harder to copy?
Restricted key systems control who can obtain blanks and duplicates, usually requiring authorization or a card. This is useful for landlords and businesses, though you still need to keep careful track of who holds keys.
Do you have a shop I can visit?
No. Crenshaw Lock Company is fully mobile. We come to your Rosemead home or business, day or night, and do the work on site.
How do I get a price?
Pricing depends on the lock type, number of doors, door condition and key needs. Call (323) 997-8867, describe your situation, and we will explain what drives the cost before work begins.
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