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Crenshaw Lock

Lock Installation in Diamond Bar · 24/7 mobile

Lock Installation in Diamond Bar, California

Crenshaw Lock Company provides mobile lock installation in Diamond Bar, California, for new doors and openings that never had a lock. We are available 24/7 and come to your home or business. Call (323) 997-8867 to describe your door and schedule installation.

  • Mobile to your Diamond Bar location
  • Available 24/7
  • Price quoted before we start
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New deadbolt being fastened to a white front door
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Installing a lock sounds simple until the door is in front of you. Is it solid wood, hollow core, steel, or an aluminum storefront? Is the bore drilled correctly? Does the strike sit in a sound frame? In Diamond Bar, where most homes were built out between the 1960s and 1980s, we see all of it: original doors with tired hardware, remodeled entries, new side doors, and garage-to-house doors that were never given a proper deadbolt.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and we are fully mobile. There is no storefront to visit. We bring cylinders, deadbolts, handlesets, smart locks, and the tools to prepare a door, so most installations are finished in one visit at your property. Owner and lead tech David Shar built the business on careful work that holds up after we leave.

This page covers installing locks where none existed before, or on a new door. If you have an existing lock that is worn or failing, we can also replace or rekey it on site. Either way, we look at the door, the frame, and how your household actually uses the entry before we recommend hardware.

How it works in Diamond Bar

  1. 1

    Tell us about the door

    Call (323) 997-8867 and tell us the door type, material, and what you want: a deadbolt, a handleset, a keypad, or a smart lock. Photos of the door edge and frame help us bring the right parts.

  2. 2

    Inspect the door and frame

    On arrival we check door thickness, bore holes, backset, and the condition of the jamb. A lock is only as strong as the wood or metal around it, so we note anything that needs reinforcement.

  3. 3

    Prepare the door

    If the door has no bores, we cut them cleanly with proper tools to protect the finish. If existing holes are the wrong size, we use the correct adapters rather than forcing a poor fit.

  4. 4

    Install and align the hardware

    We mount the lockset, set the strike plate, and make sure the bolt throws fully without binding. On a two-story tract home with a door that has settled over decades, alignment matters most.

  5. 5

    Set up keys or smart features

    We cut and test keys, and for electronic deadbolts we configure codes and walk you through the settings. We can key new locks alike so one key works for several doors.

  6. 6

    Test and hand over

    We cycle the lock repeatedly, test it with the door closed and open, and show you how it operates before we leave.

Need lock installation in Diamond Bar?

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What affects the price

  • The type of lock chosen: a basic deadbolt, a high-security cylinder, a keypad, and a smart lock all differ in hardware cost and setup time.
  • Door material and condition: solid wood, steel, and aluminum storefront doors each need different preparation, and a door with no bores takes more work than one with existing holes.
  • Whether the frame or strike area needs reinforcement to hold up against forced entry.
  • The number of locks and whether they should be keyed alike, which affects both parts and labor.
  • Specialty entries such as multi-point patio-door locks or hardware that must match a premium finish.
  • The time of day and the location of the job, since we are available 24/7 and travel to you.

Why Diamond Bar chooses us

  • Fully mobile since 1987: we do the work at your door, so there is no need to remove a door or bring it anywhere.
  • Frame-first thinking: we check the jamb and strike before we sell you a lock, because strong hardware in a weak frame does little.
  • Comfortable with both older and newer entries, from 1970s tract-home doors to modern smart deadbolts.
  • Careful with finishes: we protect high-end hardware and painted or stained doors while drilling and fitting.
  • Residential and light commercial experience, including aluminum-storefront cylinders in strip centers and office suites.
  • Straightforward guidance from the owner's team: we explain options and costs in plain terms and recommend only what the door needs.

Lock Installation across Diamond Bar

Diamond Bar is a hillside suburb, and its housing shapes the work. In Pathfinder and the Sunset Crossing area, many two-story tract and semi-custom homes from the 1960s to 1980s have attached garages. We often add a deadbolt to a garage-to-house door or fit a new side-gate or patio door, and we find that older doors sometimes have settled enough that the strike must be repositioned for the bolt to throw smoothly. Homes near Diamond Bar Blvd and Golden Springs Dr commonly ask for smart deadbolts as upgrades.

The Country Estates is a guard-gated enclave of large hillside custom homes with high-end entry hardware, keypad gates, and multi-point patio-door locks. Work here calls for a lighter touch: protecting finish hardware, matching existing styles, and fitting locks to heavy custom doors. The same goes for Summitridge area homes, where hillside layouts often mean several exterior doors to secure. If you are in ZIP code 91765 or 91789, we come to you.

Commercial needs in Diamond Bar are more limited, mostly strip centers like Diamond Hills Plaza and office parks near the SR-57/SR-60 interchange at Grand Avenue. For a suite with a new door or an aluminum-storefront entry, we install commercial cylinders and deadbolts, including after hours. Whether you live near Sycamore Canyon Park or the Diamond Bar Golf Course, call (323) 997-8867 any time.

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Other Diamond Bar locksmith services

See all of our Diamond Bar services, or our citywide lock installation page.

Lock Installation in Diamond Bar — FAQs

Can you install a lock on a door that has never had one?
Yes. We prepare the door by cutting the correct bores and edge mortise, then install and align the lock. Call (323) 997-8867 and tell us the door material so we bring the right tools.
Do you install smart deadbolts in Diamond Bar homes?
Yes. Electronic and smart deadbolts are increasingly common here, and we install and configure them, set up codes, and show you how they work. Fit still depends on the door and frame, so we check those first.
Can you work on gated homes in The Country Estates?
Yes. We understand guard-gated and keypad-gate properties and take care with high-end finish hardware. Let us know about gate access when you call (323) 997-8867 so we can plan the visit.
Can you add a deadbolt to my garage-to-house door?
Yes. Many attached garages in Diamond Bar homes have a basic knob lock on the interior door. We can install a proper deadbolt and reinforce the strike so it resists force.
Do you install commercial locks near the SR-57/SR-60 interchange?
Yes. We install and replace commercial cylinders and deadbolts for suites and storefront doors, including aluminum-frame entries, and we can work after hours since we are available 24/7.
How much does lock installation cost?
Cost depends on the lock type, door material, whether the door needs drilling, frame reinforcement, and how many locks are involved. Describe the job when you call and we will explain what affects the final price.
Can all my new locks use the same key?
Usually yes. We can key new locks alike so one key opens the front door, side door, and garage entry, subject to the brand and model you choose.
Is there a shop I can visit?
No. We are fully mobile and come to your location anywhere in the area. Call (323) 997-8867 any hour to arrange service.
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