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Crenshaw Lock

Residential Locksmith in Diamond Bar · 24/7 mobile

Residential Locksmith in Diamond Bar, California

Crenshaw Lock Company provides residential locksmith service in Diamond Bar, California, 24 hours a day, 7 days a week. We are fully mobile and come to your home for lockouts, rekeys, repairs, replacements and upgrades. Call (323) 997-8867 to talk with a technician about your door.

  • Mobile to your Diamond Bar location
  • Available 24/7
  • Price quoted before we start
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Deadbolt and lever handle on a wooden front door
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Diamond Bar is a hillside suburb, and its homes show it. Much of the city was built out between the 1960s and 1980s, so there are plenty of two-story tract and semi-custom houses with attached garages, original deadbolts that have been turned thousands of times, and entry doors that have shifted a little as the hillsides and the seasons have done their work. Homeowners here also tend to be upgrading: electronic and smart deadbolts are showing up more and more on front doors and garage entries.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner and lead technician David Shar built the business around one idea: a locksmith should come to you, do the work properly, and explain what was done. We are mobile only. There is no storefront to visit, so everything happens at your door, whether you are in a gated enclave or on a quiet street off Diamond Bar Blvd.

Residential work covers a wide range. Some calls are urgent, such as a lockout late at night or a deadbolt that will not retract. Others are planned, such as rekeying after buying a house, moving a family onto a single key, or swapping an aging lockset for something sturdier. We handle both, at any hour, and we will tell you plainly whether a repair, a rekey or a replacement makes the most sense.

How it works in Diamond Bar

  1. 1

    Call and describe the door

    Call (323) 997-8867 any time, day or night. Tell us what the lock is doing, what kind of door and hardware you have, and whether it is a lockout or a planned job. For gated properties, let us know how access works so we arrive prepared.

  2. 2

    Confirm access and identity

    Before we open or change anything, we ask you to show that you live at or are authorized for the home. This protects you and your neighbors, and it is a normal part of legitimate locksmith work.

  3. 3

    Assess the lock on site

    We look at the deadbolt, handleset, strike plate and door alignment. A deadbolt that sticks in warm weather may be worn internally, may be binding because the door has shifted, or may simply need a new cylinder. Diagnosing the real cause avoids paying for the wrong fix.

  4. 4

    Open, rekey, repair or replace

    Where possible we use non-destructive entry methods to protect finish hardware, which matters on high-end entry sets. Then we do the agreed work: rekeying cylinders to new keys, repairing worn parts, or installing new locks, including smart deadbolts.

  5. 5

    Test everything before we leave

    We cycle each lock with the door open and closed, check the latch and strike alignment, and make sure every new key works smoothly. You get the working keys and a clear explanation of what was changed.

Need residential locksmith in Diamond Bar?

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

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What affects the price

  • The type of job: a lockout, a rekey, a repair and a full replacement involve different labor and parts.
  • The hardware itself: standard tract-home deadbolts cost differently from high-security cylinders, multi-point patio locks or electronic smart deadbolts.
  • The number of locks involved, since rekeying every door in a home is a different scope than working on one entry.
  • Condition and fit of the door, such as a shifted door or damaged strike plate that must be corrected for a new lock to work well.
  • Time of day, because after-hours and overnight calls differ from scheduled daytime appointments.
  • Access complications, such as a gated property or a keypad system that must be worked through as part of the job.

Why Diamond Bar chooses us

  • Fully mobile and available 24/7, so a lockout at a hillside home is handled at your door rather than somewhere you have to travel to.
  • Serving the region since 1987, with owner David Shar leading the work, so experience with older tract-home hardware is built in.
  • Care with finish hardware: we favor non-destructive entry on upscale entry sets and explain options before drilling anything.
  • Honest recommendations: if a rekey fixes the problem, we will not push a full replacement, and if a lock is truly worn out, we will say so.
  • Comfortable with both traditional and electronic locks, from classic deadbolts to smart deadbolts and multi-point patio-door hardware.
  • No storefront overhead or gimmicks: we are a mobile service and describe pricing in terms of the actual work involved.

Residential Locksmith across Diamond Bar

Diamond Bar's housing varies more than people expect. In Pathfinder and around the Sunset Crossing area, you will find many of the two-story tract and semi-custom homes from the 1960s through the 1980s. Locks that old often have worn pins and loose spindles, and a deadbolt that stops retracting in summer heat is a common complaint. A rekey or a new cylinder on site usually brings these doors back to dependable use, and it is also a smart move after buying a resale home in ZIP code 91765.

The Country Estates is a different world: a guard-gated enclave of large hillside custom homes with keypad gates, high-end entry hardware and multi-point patio-door locks. A lockout there involves more than the front door, because the perimeter gate keypad may be part of the problem. We approach these properties carefully, working to protect finish hardware and expensive entry sets. In the Summitridge area and other hillside streets in 91789, long driveways and grade changes are part of the job, and we plan for them.

We reach homes from the SR-57 and SR-60 corridors along Grand Ave, Diamond Bar Blvd and Golden Springs Dr, whether you are near Diamond Hills Plaza, Sycamore Canyon Park, the Diamond Bar Golf Course or Diamond Bar Center. Commercial space here is mostly strip centers and office parks near the freeway interchange, and while this page focuses on homes, call (323) 997-8867 if you need help with that too.

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Other Diamond Bar locksmith services

See all of our Diamond Bar services, or our citywide residential locksmith page.

Residential Locksmith in Diamond Bar — FAQs

Do you come to homes in Diamond Bar at night?
Yes. We are available 24/7 and fully mobile, so lockouts and urgent lock failures can be handled at any hour. Call (323) 997-8867 and describe the situation.
My deadbolt will not retract in hot weather. What is wrong?
Heat can make a door or frame swell slightly, causing the bolt to bind, or an older worn lock may be failing internally. This is common in 1970s tract homes. We check alignment and the lock itself, then rekey, repair or replace as needed.
Should I rekey or replace my locks after buying a house?
Rekeying is often enough if the hardware is in good condition, because it makes old keys useless. If the locks are worn or you want an upgrade, such as a smart deadbolt, replacement makes more sense. We will advise you on site.
Can you help if I am locked out at The Country Estates?
Yes. We work with gated properties and high-end entry hardware, using methods that protect finishes whenever possible. Let us know about the gate and keypad when you call (323) 997-8867 so we can plan.
Do you install smart locks?
We install and set up electronic and smart deadbolts, which are increasingly common in Diamond Bar. We can also help you decide whether a keypad, smart or traditional deadbolt suits your door and routine.
Do you have a shop I can visit?
No. Crenshaw Lock Company is mobile only, with no storefront. We come to your home, which means the work is done where the lock actually is.
How much will a residential locksmith job cost?
It depends on the job type, the hardware, how many locks are involved, door condition, time of day and access complications. We discuss these factors and the scope of work before starting. You can describe your situation at (323) 997-8867.
Do I need to prove I live at the home?
Yes, we ask for reasonable proof that you live there or are authorized to have access. It is standard practice that protects residents from unauthorized entry.
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